34 Another study showed that sustained pupil contraction to a bri

34 Another study showed that sustained pupil this website contraction to a bright blue light stimulus

increased, and redilation to baseline took longer, in older than younger subjects.35 This may indicate a compensatory response to the lower blue light transmission through the aging lens. The fact that older patients with cataracts exhibited faster reaction times under blue-enriched light after cataract surgery (with clear UV-only blocking intraocular lens replacement) when compared with presurgery performance36 indicates that attenuation of blue light sensitivity might be an epiphenomenon caused by reduced light transmission of the lens, and not by a change in sensitivity Inhibitors,research,lifescience,medical of melanopsin-dependent function itself. Likewise, older subjects suppressed melatonin less in response to monochromatic blue than green light37,38 and exhibited reduced responsiveness with respect to mood and alertness when compared with a young group.37 Healthy older subjects showed a reduction in the phase-delaying Inhibitors,research,lifescience,medical response to moderate light39 and, evening exposure of healthy elderly subjects to either polychromatic blue-enriched or polychromatic white light did not differ in its effects on phase delay, evening alertness, and sleep architecture.40 One interpretation might be

that non-image-forming light perception Inhibitors,research,lifescience,medical undergoes different age-related modifications of functionally separated ipRGC dependent pathways. Light treatment of misaligned circadian rhythms Scheduled bright light exposure is an effective countermeasure for sleepiness and fatigue, ie, in shift workers during night work and for re-entrainment after return to daytime shifts, Inhibitors,research,lifescience,medical or jet lag. Other circadian

rhythm sleep disorders, such as delayed and advanced sleep phase syndrome, can be treated with light therapy as well (for reviews see refs 41,42). Light therapy is used alone or as adjuvant Inhibitors,research,lifescience,medical therapy in a growing number of psychiatric and neurodegenerative diseases, where alterations of sleep-wake cycles are often observed:43-45 Light has antidepressant properties and is the treatment of choice for seasonal affective disorder (SAD),46 and is increasingly used in nonseasonal depression,45-47 particularly efficient when combined with serotonin reuptake inhibitors.48-50 Moreover, beneficial effects of light on mood, agitation, sleep quality, and/or cognitive performance have been found in patients through with ante-partum depression,51 borderline personality disorder,52,53 bulimia nervosa,54 adult attention-deficit/hyperactivity disorder,55 and Parkinson’s disease56 as well as Alzheimer’s disease and other dementias,57,58 by applying open trial designs and double-blind protocols. The control condition in those studies was either no light treatment, or lower light intensities (ie, 70 lx,51 500 lx red light54), or lower lighting (±300 lx) compared with whole-day bright lighting installations (±1000 lx) in elderly care units.

There are a number of individual and group interventions, includi

There are a number of individual and group interventions, including cognitive behavioural therapy, anxiety management and AZD4547 order confidence building. Sessions include medication awareness, dietary choices, physical fitness, gardening and teaching life skills, in addition to monitoring for adverse events from medication. Users are encouraged to be involved in the planning of their individual programme. Inpatients may attend for the duration of their admission and outpatients are expected to attend for a minimum of 2–3 days per week for 3 weeks, when progress Inhibitors,research,lifescience,medical is reviewed. Full-time

attendance would be up to 5 days or nine sessions. Should any event suggest a possible diagnosis of PDSS there is an on-call physician. Discussion This small case series demonstrates that Inhibitors,research,lifescience,medical patients with schizophrenia for whom OLAI is appropriate can be treated

within an existing healthcare facility with minimal restructuring of processes. Although each case has had an acceptable outcome and the clinical status of each patient has improved, this case series cannot provide definitive clinical outcome data. Adherence to medications is a challenge in all therapeutic areas. For specific patients who respond to olanzapine but who are nonadherent to oral medications depot medication may provide a solution. Adherence to medication is often overestimated by clinicians and extensive data support Inhibitors,research,lifescience,medical the view that using clinical research tools to measure adherence rates results in significantly lower adherence than previously thought Inhibitors,research,lifescience,medical [Velligan et al. 2009]. Data from the olanzapine therapeutic monitoring service, which assesses plasma olanzapine levels guiding dosage and estimates adherence, have recently been audited Inhibitors,research,lifescience,medical [Patel et al. 2011]. A key finding from this audit of 5856 samples obtained in the period 1999–2009 was that there was no detectable olanzapine in 6% of samples. Dose, smoking, gender, age and body weight explained only 24% of the variance in plasma olanzapine levels, suggesting that adherence may have a significant role in explaining the remaining variance. Usage of effective depot next medications may also reduce hospitalization

rates, as recently shown in a nationwide study from Finland in a first-hospitalization cohort of 2588 patients. In this study the risk of hospitalization in patients receiving depot antipsychotics was about one-third of that for patients receiving oral medications (adjusted hazard ratio 0.36, 95% confidence interval 0.17–0.75) [Tiihonen et al. 2011]. Mortality was also significantly reduced in medication-adherent cohorts, which was consistent with previous findings on mortality in schizophrenia [Bushe et al. 2010]. In our case series it is not possible to be specific about reasons for good clinical outcome, however improved adherence is a likely factor in addition to the ongoing psychosocial support within the daycare unit.

In elderly settings, over one third of those admitted had a diagn

In elderly settings, over one third of those admitted had a diagnosis of dementia and so may be

uncertain about adherence to prescribed medicines or the details of administered medicines. For this latter group of patients, their carer or care home was often asked for this information. Between baseline and re-audit there was a significant increase in the proportion of patients for whom their GP was contacted for information about their medication. This may reflect an increasing awareness within mental health settings of the importance of inquiring about, investigating and treating Inhibitors,research,lifescience,medical 4-mu in vivo physical illness. Nature of medication discrepancies It is clear from the literature that the most common type of discrepancy identified during the process of medicines reconciliation is the omission of previously prescribed medication [de Winter et al. 2010; Robinson,

2008; Strunk et al. 2008; Morcos et al. 2002; Clarke, 1993]. Inhibitors,research,lifescience,medical The nature of the omitted medicines is related to the clinical setting, in that psychiatric teams may fail to prescribe medicines for physical illness [Clarke, 1993] and GPs may miss medicines for psychiatric illness [Robinson, 2008; Clarke, 1993]. Our findings were Inhibitors,research,lifescience,medical consistent with those of previous studies in that omissions were the most commonly reported discrepancy, and most commonly involved medicines for physical illness. Further, reviews of published studies on medication adherence have Inhibitors,research,lifescience,medical concluded that within all healthcare settings poor adherence or nonadherence to prescribed medication is the rule rather than the exception, particularly immediately prior to admission to an adult acute psychiatric ward [Lacro et al. 2002; Cramer and Rosenheck, 1998]. In accordance with this, we found that fewer than 20% of patients admitted to such wards had documented evidence in their clinical record

that medication was Inhibitors,research,lifescience,medical being taken as prescribed prior to admission. Thus, when prescribing at the time of admission, medicines that the patient has been taking at home may be missed, but it is also possible that medicines that have been prescribed but not taken may be re-instated. Both types of error can lead to harm, and clinically significant examples of both were reported in our audits. In most cases where the omission had the potential to cause significant harm, the drug had been initiated or continued by a physician or other hospital specialist. Terminal deoxynucleotidyl transferase Examples of omitted drugs include erythropoietin, goserelin and methotrexate. Such drugs may not be documented in a patient’s primary care record; some primary care systems record only the drugs that are being prescribed by primary care, rather than by all clinicians involved in a patient’s care. With respect to re-instatement at full dose of medicines that were prescribed but not being taken prior to admission, the notable examples from our audits were methadone and clozapine.

Among inpatients treated with amitriptylinc, approximately one th

Among inpatients treated with amitriptylinc, approximately one third had been found to be complete responders, partial responders, and nonresponders, respectively.7 Weissman et al8 reported a follow-up study to

4 years in a sample of female depressives who had responded to initial treatment with amitriptyline and had been included in a controlled trial of Inhibitors,research,lifescience,medical continuation antidepressant and psychotherapy. Many showed moderate or fluctuating symptoms, corresponding approximately to residual chronicity, but. included some subjects who relapsed and then remitted. Occurrence of residual symptoms had been noted in general practice patients with depression and anxiety, 9 and in 38% of elderly dépressives at 1 year, and 20% at 2 to 4 years.10 More recently, one or more residual symptoms have been found in 82% of elderly depression remitters below 8 on the Hamilton Depression scale.11 At. these levels the subjects would be below the usual threshold for partial remission, however. More recent, Inhibitors,research,lifescience,medical studies of residual symptoms have been reviewed by Fava et al.12 They have been reported both after drug treatment and psychotherapy. Fava et al, 13 in a study of their own, reported a strong relationship between prodromal and residual Inhibitors,research,lifescience,medical symptoms. The most common symptoms were irritability and anxiety. The influential

Sequenced Treatment Alternatives to Relieve Depression (STAR*D) study, 14 which has reported higher nonIntegrase inhibitor remission rates for depression than hitherto thought, Inhibitors,research,lifescience,medical to occur, did not use a criterion for partial remission. Residual symptoms and relapse Following remission, the patients in our original study4 were followed for another 15 months. As in other followup studies, there was a high rate of subsequent relapse, with 40% of subjects relapsing over the next. 15 months. All the relapses occurred in the first 10 months, giving some support to the concept, of relapse as an early phenomenon that is distinguished from Inhibitors,research,lifescience,medical recurrence later in time. An

important, finding emerged when we separated out the subjects with residual symptoms at remission. Among these, 76% relapsed in the next 10 months, compared with 25% of subjects without residual symptoms.3 Residual symptoms were a key indicator of subsequent relapse. A number of other studies have drawn attention to high relapse rates in residual dépressives.10,15-18 One study19 found that patients Megestrol Acetate with residual symptoms of depression obtained greater benefit from maintenance antidepressant therapy than those who had completely recovered. Prien and Kupfer20 found that relapse was less common after full remission of at. least. 16 weeks, a finding on which they based a recommendation that continuation treatment should comprise at least 4 months of complete remission. After 9 months, 49% of a Dutch sample were found to be in full remission and 45% in partial remission.

The differences between both forms of EDMD in the level of antibo

The differences between both forms of EDMD in the level of antibodies at diagnosis and at follow-up is hard to explain. They are possibly related to the fact that, in AD-EDMD, damage of the left ventricle muscle cells predominates and is increasing with disease progression, in the X-EDMD, mainly disturbances in heart conductivity are present. In X-EDMD, autoimmunity gradually subsides, which is also observed in some autoimmune disorders such as insulin dependent Inhibitors,research,lifescience,medical diabetes type 1 (28). This is

not the case in AD-EDMD. Whatever the role of anti-heart antibodies, their level in the blood might be a useful non-invasive marker in Inhibitors,research,lifescience,medical predicting the susceptibility of the EDMD patients at risk of developing DCM, especially as it often causes sudden death of the patients even with no evident

preceding cardiac symptoms. Acknowledgments The study was conducted after approval (No KB 2/2005) of the ethics committee for human research at the Medical University of Warsaw. The study was supported by a grant from the State Committee for RG7422 cell line Scientific Research (No 2PO5B 106 29) to Prof. Irena Hausmanowa-Petrusewicz).
Many mutations in caveolin-3 gene have been detected in autosomal Inhibitors,research,lifescience,medical dominant limb-girdle muscular dystrophy (LGMD) 1C and autosomal dominant rippling muscle disease (AD-RMD) (8, 9). Mutations of the caveolin-3 gene cause a significant reduction in the cell surface level of caveolin-3 protein in a dominant-negative fashion and, to a lesser

extent, mistargeting of the mutant caveolin-3 protein Inhibitors,research,lifescience,medical to the Golgi complex (8–10). The loss of caveolin-3 by mutations of the caveolin-3 Inhibitors,research,lifescience,medical gene in LGMD1C/AD-RMD patients has resulted in subsequent abnormalities of caveolin-3-binding molecules. The enzymatic activity of neuronal nitric oxide synthase, which is strongly suppressed by caveolin-3, increases in the skeletal muscles from a transgenic mouse model of LGMD1C and LGMD1C/AD-RMD patients (11, 12). Consistently, cytokine-induced NO production increases in C2C12 myoblast cells transfected with LGMD1C/AD-RMD-type mutant caveolin-3 compared to ones transfected with wild-type caveolin-3 (9). Src tyrosine kinase, a membrane tyrosine kinase whose activation also regulates the balance between cell survival and cell death, is extremely activated and accumulates not in the plasma membrane but in the perinuclear region in cells transfected in LGMD1C/AD-RMD mutant caveolin-3 (13). Muscle-specific phosphofruktokinase, an enzyme of central importance in the regulation of glycolytic metabolism is also significantly reduced in cells transfected with LDMD1C/AD-RMD mutant caveolin-3 probably through ubiquitin-proteasomal degradation (14).

15 Teaching that incorporates the various aspects of intelligenc

15 Teaching that incorporates the various aspects of intelligence Increases academic performance relative to conventional teaching.16 Sternberg has argued that intelligence is at least somewhat malleable throughout the lifespan. Biological bases of intelligence Biological approaches to intelligence directly examine the brain and its functioning.17 Intelligence as measured by IQ tests appears to be localized, In part, in the prefrontal cortex (PFC) and across the neocortex. People with higher Inhibitors,research,lifescience,medical IQs show higher levels of functioning in the

superior parietal, temporal, and occipital cortexes as well as In subcortical regions of the brain, especially the striatum.18 Integration of functioning in the parietal and frontal Inhibitors,research,lifescience,medical lobes appears to be especially important.19 Several different biological approaches have been used, most comparing biologically based measures to IQ. Neural efficiency Complex patterns of electrical activity In the brain as prompted by specific stimuli correlate with scores on IQ tests. In particular,

speed of conduction of neural impulses may correlate with intelligence as measured by IQ tests.20 Some investigators have suggested that this research supports a view that intelligence is based, at least in part, on neural efficiency.21 Additional support for neural efficiency as a measure of intelligence can be found from studies Inhibitors,research,lifescience,medical of how the brain metabolizes glucose during mental activities. Haier and his colleagues have found that higher intelligence correlates with reduced levels of glucose Inhibitors,research,lifescience,medical metabolism during problem-solving tasks.22 Furthermore, Haier

and colleagues found that cerebral efficiency increases as a result of learning a relatively complex task involving visuospatial manipulations Inhibitors,research,lifescience,medical (for example, in the computer game Tetris).23 As a result of practice, individuals with higher IQ demonstrate lower cerebral glucose metabolism overall. But they also show more specifically localized metabolism of glucose. In most areas of their brains, persons with higher IQ show less glucose metabolism, but in selected areas of their brains (GDC-0068 solubility dmso thought to be important to the task at hand), they show higher levels of glucose metabolism. Thus, people with higher IQ may have learned how to use their brains more efficiently (see refs 24,25). These results are not consistent throughout the entire literature. Studies using electroencephalographic click here (EEG) methods have also noted a pattern of neural efficiency in Intelligent individuals. Using EEG methods, Neubauer and colleagues noted that greatest neural efficiency was observed in the brain areas associated with the individual’s greatest ability.24 Today, however, event-related potentials (ERPs) are used more widely than EEGs In the study of biological bases of intelligence. Research has examined the relation between intelligence test scores and P300.

Compounds

transported by P-gp

Compounds

transported by P-gp include important anticancer drugs like Vinca alkaloids [152], anthracyclines [153], epipodophyllotoxins, and taxanes [154]. So ABC transporters may reduce the amount of drug absorbed and limit bioavailability in a dose-dependent, inhibitable, and saturable manner [155]. Due to its ability to expel therapeutics, the presence of intestinal P-gp is associated with a decrease in oral bioavailability and is thought to be one of the most significant causes for decreased permeability and therefore oral bioavailability. Therefore, modulation of its activity is regarded as a potential means to improve Inhibitors,research,lifescience,medical drug bioavailability. 4.4.2. Polymers Commonly Used in P-gp Inhibiting PMs for Enhancement of Bioavailability The first P-gp inhibitors proposed were substrates that could bind to the protein and inhibit its activity. Several drugs, including cyclosporine A (cyA) and verapamil, have been studied for this purpose [156, 157]. However, these molecules may be associated with toxic side effects, and amphiphilic polymers were presented as a potential Inhibitors,research,lifescience,medical alternative Inhibitors,research,lifescience,medical [158]. Mostly,

the inhibition of efflux transport with amphiphilic polymers appears to be related to a modification of the fluidity of the cellular membrane [159]. This PKA inhibitor inhibitory effect has been demonstrated with both low-molecular weight and polymeric micelles, among which D-a-tocopheryl polyethylene glycol succinate (TPGS) [160, 161] and Pluronics have been extensively studied. Pluronic block copolymers (also known under their nonproprietary name “poloxamers”) consist of hydrophilic ethylene oxide (EO) and hydrophobic propylene oxide (PO) blocks Inhibitors,research,lifescience,medical arranged in a basic A-B-A structure: EOn/2-POm-EOn/2. The structure formula of Pluronic block copolymers is shown in Figure 4. Membrane fluidization is known to contribute to inhibition of P-gp efflux Inhibitors,research,lifescience,medical function. Pluronic block copolymers are known to induce drastic changes in the microviscosity of cell membranes, and these changes can be attributed to the alterations in the structure of the lipid bilayers

as a result of absorption of the block copolymer molecules on the membranes [162]. Yoncheva et al. once prepared, characterized, and evaluated the pharmacokinetics of PTX incorporated in stabilized Pluronic micelles [49]. The stabilization of micelles was performed by cross-linking aminophylline of their core, aiming to prevent disaggregation of micelles upon dilution in physiological fluids. Moreover, Pluronic copolymers may inhibit the activity of drug efflux transporters such as P-gp, MRPs, and BCRP [163, 164], which make it an adequate strategy to increase the bioavailability and promote the efficacy of PTX. Furthermore, it is believed that inhibition of P-gp ATPase activity, presumably through nonspecific changes in lipid and protein conformation and mobility, has a major contribution to the inhibition of P-gp efflux function [3].

”23 Janet described how the memories of these traumas tended to r

”23 Janet described how the memories of these traumas tended to return not as stories of what had happened: they were reenacted in the form of intense emotional reactions, aggressive behavior, physical pain, and bodily states that could all be understood as the return of elements of the

traumatic experience. Janet first observed that traumatized patients seemed to react to reminders of the trauma with responses that had been relevant to the original threat, but that currently had no adaptive value. Upon exposure Inhibitors,research,lifescience,medical to reminders, the trauma was reactivated in the form of images, feelings, and physical sensations related to the trauma.21 He proposed that when patients fail to integrate the traumatic experience into the totality of their personal awareness, they seem Inhibitors,research,lifescience,medical to develop problems assimilating new experiences as well. It is … as if their personality

has definitely stopped at a certain point, and cannot enlarge any more by the addition or assimilation of new elements.“23 ”All (traumatized) patients seem to have had the evolution of their lives checked; they are attached to an insurmountable obstacle.“24 Janet proposed that the efforts to keep the fragmented traumatic memories out Inhibitors,research,lifescience,medical of conscious awareness eroded the psychological energy of these patients. This, in turn, interfered with the capacity to engage in focused action and to learn from experience. Unless the dissociated elements of the trauma were integrated into personal consciousness, the patient was likely to experience a

Inhibitors,research,lifescience,medical slow decline in personal and occupational functioning.25 As a young physician, during the 1880s, Sigmund Freud did two clinical rotations at the Salpêtrière in Paris. Upon his return to Vienna he attached himself to an older internist, Jospeh Breuer, with whom he started to carefully study the symptoms of ”hysterical“ patients, and the origins of their symptoms, which were often characterized by marked motoric and sensory abnormalities. Inhibitors,research,lifescience,medical They summarized their first set of findings in a paper entitled On the Physical Mechanisms of Hysterical Phenomena.76 old Because of the astuteness of their ATM Kinase Inhibitor mouse observations it is useful to quote part of their account: The … memory of the trauma … acts like a foreign body which long after its entry must be regarded as an agent that is still at work. At first sight it seems extraordinary that events experienced so long ago should continue to operate so intensely – that their recollection should not be liable to the wearing away process to which, after all, we see all our memories succumb. The following considerations may perhaps make this a little more intelligible. The fading of a memory or the losing of its affect depends on various factors.

This likely contributed to suppressed DArgic neurodegeneration T

This likely contributed to suppressed DArgic neurodegeneration. The surviving neurons with elevated Bcl-xL SB216763 expression then would affect the actions of glial cells within their vicinity. Neurons fated to die may activate microglial cells to accelerate neuronal degeneration, while surviving neurons may activate neuroprotective attributes of glial cells (Streit et al. 1999; Cullheim and Thams 2007). Regardless of the cause of brain injury, microglial cells respond to even minor pathologic events in the brain, evident by morphologic changes such as enlargement of their cell bodies and Inhibitors,research,lifescience,medical shortening

of their ramified processes (Kreutzberg 1996; Streit et al. 1999). 6-OHDA-treatment caused microglial activation with these types of morphologic changes. However, it is notable that the activated morphology was observed regardless

of the survival of DA neurons, with or without the cytokine mixture injection. Interestingly, Inhibitors,research,lifescience,medical many studies have described the harmful effects of activated microglia on neurons (Mosley et al. 2006; Long–Smith et al. 2009; Tansey and Goldberg 2010); however, our results suggest that this may not always be the case. There Inhibitors,research,lifescience,medical are some controversies regarding the activation of microglia (Liberatore et al. 1999; Henry et al. 2009; Marinova–Mutafchieva et al. 2009). Is their activation the cause or the result of DArgic neurodegeneration? Inhibitors,research,lifescience,medical Because DArgic neurodegeneration induced by 6-OHDA is a

rather chronic process (Henry et al. 2009; Marinova–Mutafchieva et al. 2009), it is conceivable that microglial activation may influence the fate of DArgic neurons even if the DArgic neurodegeneration precedes microglial activation. In fact, proinflammatory cytokines, such as IL-1β or TNFα, and reactive oxygen species, such as NO or superoxide, which are produced by microglia, have been implicated in the pathogenesis of PD (McGeer and McGeer 2008; Long–Smith Inhibitors,research,lifescience,medical et al. 2009; Yacoubian and Standaert 2009; Tansey and Goldberg 2010). The ameliorative effects of the cytokine mixture may be related to the functional changes of the activated microglia. The cytokine injection decreased the expression Org 27569 of IL-1β or TNFα in the SNpc of 6-OHDA-treated rats and it simultaneously increased expression of IGF-1 and HGF. IGF-1 (Guan et al. 2000; Ebert et al. 2008;) and HGF (Koike et al. 2006) have been shown for its ameliorative effects of 6-OHDA-induced rat Parkinsonism. Addition of GM-CSF and IL-3 to primary microglial cell cultures induced similar expression spectra of the proinflammatory cytokines and the neuroprotective factors. Thus, the action of the cytokine mixture to alter the microglial phenotype from a neurotoxic phenotype to a neuroprotective one, could at least partly explain the amelioration of 6-OHDA-induced Parkinsonism by the cytokine mixture.

43 In the first study, patients in the early stages of recovery f

43 In the first study, patients in the early stages of recovery following TBI performed verbal time estimates for 10-to 60-second intervals.41 The findings revealed no difference between time estimation in TBI and control subjects for durations less than 30 seconds, whereas TBI patients significantly underestimated the longer durations. The authors suggested that episodic memory dysfunction may account for the poorer check details accuracy of the TBI participants at durations that exceeded the time frame of working memory, a result that has also been found in other patients with long-term memory deficits.30,34,37 Inhibitors,research,lifescience,medical In the second study, the same verbal time estimation task was proposed in

the early phase of recovery from injury and 1 year later.42 The results revealed that in the early phase of injury, patients underestimated the durations Inhibitors,research,lifescience,medical that exceed working memory, whereas at 12-month follow-up they exhibited normal time judgments despite a persistent episodic memory impairment. Moreover, in both phases of recovery, patients were not more variable than controls

in their estimations. Measures of attention, speed processing, and executive functioning in TBI patients were still below these of normal controls at 1 year post-injury, but no significant correlations Inhibitors,research,lifescience,medical were found between the neuropsychological tests and time estimation accuracy. The authors suggested that patients could have relearned to accurately estimate time units during recovery, which is compatible with the hypothesis we proposed to explain the accurate duration productions in the amnesic patient AC.30 Time estimation in patients with Parkinson’s disease Parkinson’s disease (PD) represents an excellent model to study

the effects of dopaminergic dysfunctions on temporal judgments. Our Inhibitors,research,lifescience,medical patients performed like normal controls in the reproduction task, while they overproduced the short duration (5 s) and underproduced the long duration (38 s) in the production task: this temporal judgment Inhibitors,research,lifescience,medical bias, known as “the migration effect,”20 was correlated with short-term memory scores. Thus, the influence of durations on each other would occur between the different trials within a session rather than between the representations of durations about in long-term memory. We also used a finger- tapping task, which is assumed to be a direct measure of internal clock speed, and we found that PD patients who produced the longer durations were those with the slowest 1-second tempo. Therefore, we proposed that levodopa administration in PD patients would have counteracted the slower rate of the internal clock typically reported in nonmedicated patients, without restoring all of the memory functions. Several other recent studies have shown a similar migration effect in PD patients.25,44,45 Time estimation in psychiatric patients Patients with affective disorders have often been reported to exhibit impaired duration judgments.