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Query: UMLS:C0011570 (depression)
 172,036 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Psychostimulant abusers often experience anhedonia, depression, fatigue, craving, and hypersomnia and increased propensity for rapid eye movement (REM) sleep during periods of acute and subacute withdrawal from cocaine and amphetamine. These signs and symptoms may reflect a state of relative functional dopamine depletion in the brain during abstinence. Lisuride, which has dopaminergic agonist effects, has been reported to reduce signs of psychostimulant withdrawal in rodent models of stimulant abuse. These observations prompted us to test the effects of oral administration of lisuride for 3 weeks (up to 4.0 mg daily) on mood and craving ratings in a double-blind, parallel design, controlled study in hospitalized stimulant abusers during acute withdrawal from cocaine or amphetamine. Although administration of lisuride significantly prolonged REM latency and reduced REM time, amelioration of other signs of withdrawal was not significantly greater in lisuride as compared with placebo treated patients. Self-rated craving ratings, however, were low in both groups throughout the hospital stay. Further studies, perhaps in patients with more severe symptoms during withdrawal, are needed to fully test the efficacy of lisuride in the treatment of stimulant withdrawal.
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PMID:The effects of lisuride on mood and sleep during acute withdrawal in stimulant abusers: a preliminary report. 805 6

Smoking variables were assessed in female (n = 48) and male (n = 28) French hospitalized depressed smokers. Nicotine dependence, motives for smoking, and emotional situations in which depressed smokers were likely to smoke were compared with those of female (n = 36) and male (n = 60) nondepressed smokers from the general population. Depressed smokers scored higher than controls on nicotine dependence, and on stimulant and sedative smoking; they also reported that they were more likely to smoke in negative emotional situations. Sedative smoking decreased significantly between admission and discharge. Sedative smoking is a strong reason for smoking among depressed smokers regardless of degree of dependence, whereas stimulant smoking is positively correlated with degree of dependence. Nicotine dependence is also significantly correlated with anhedonia, and its relationship to depression is discussed in regard to nicotine action on hedonic systems.
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PMID:Nicotine dependence and motives for smoking in depression. 808 Nov 10

Citalopram i.v. and oral had a reliable antidepressive and anxiolytic effect in 101 hospitalized patients, as apparent from the achievement of complete remission in cca 60% of the patients with major depression after four weeks follow-up. Treatment with citalopram by the intravenous or oral route was most successful in anxious or inhibitory depressions, while atypical forms with hypochondriac or obsedant features responded better to infusions. The global score of HAMD and FKD scales and typical symptoms of depression such as a pathic decreased mood, anhedonia, feelings of guilt, lack of interest, anxiety and suicidal thoughts were positively reduced. The following were not affected: loss of appetite, loss of weight, anosognosia, paranoidity, and hallucinations. The clinical onset of the therapeutic effect was on average apparent on the 10th-12th day of therapy, significantly sooner when the intravenous route was used. The authors did not find significant differences in the therapeutic results in patients under and above 60 years and in those with a mild or severe depression. As regards subjective preference and preference by relatives, infusions were unequivically preferred as they had, no doubt, also a psychological effect. As to the incidence of undesirable effects, the authors did not detect a difference between the two routes of administration of citalopram, which was well tolerated and 50% of the patients did not report any side-effects and the rare ones recorded were not more frequent than in 20% of patients.
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PMID:[Citalopram (Seropram) in tablet and infusion forms in the treatment of major depression]. 812 33

In the last century psychopathologists attached importance to the concept of anhedonia, the loss of ability to experience pleasure. Its role in the diagnosis of melancholia was considered to be crucial. In the present century attention to anhedonia has faded, possibly because of the focus upon depressed mood as the pathognomonic feature of depressive disorders. Research on the symptomatology of endogenous depression did not include the concept; anhedonia was also lacking from the major instruments of psychiatric research, the depression rating scales, Attention was drawn to anhedonia by two authors: by Meehl in the 1960s and by Klein in the 1970s. Meehl considered anhedonia from the point of view of a personality defect predisposing to mental illness; and Klein regarded anhedonia to be a symptom of depressive illness and probably the best clinical marker predicting response to antidepressant drugs. In 1980 the revised DSM presented the concept of 'loss of interest or pleasure' as one of the two cardinal symptoms of major depression. Since then there has been a gradual recovery of emphasis although many systems confuse the two concepts of 'loss of interest' and anhedonia. It is possible that anhedonia may provide the key to a more exact delineation of depressive disorders in biological research and in clinical practice. Further research will depend upon a more precise, cross-nationally agreed definition of the concept and the means of its assessment.
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PMID:Anhedonia: a neglected symptom of psychopathology. 813 19

This study was designed to validate a novel animal model of depression by testing the curative effects of the atypical antidepressant mianserin. In this paradigm, the hedonic state of rats was assessed using an intracranial self-stimulation (ICSS) procedure. The ICSS threshold was determined before, during and after a 38-day period of exposure to a variety of intermittent, unpredictable, mild stressors. After 11 days of this regimen, the ICSS threshold was significantly higher in the stressed rats, suggesting a gradual decrease of sensitivity to reward. This "anhedonia" lasted throughout the stress regimen and progressively diminished over a 20-day period after stress was terminated. When stressed animals exhibiting anhedonia were treated with mianserin, the stress-induced increase in the ICSS threshold was gradually reversed over ten days of treatment. These results provide further support for the value of this anhedonia paradigm in modelling an important aspect of human depressive disorders.
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PMID:Curative effects of the atypical antidepressant mianserin in the chronic mild stress-induced anhedonia model of depression. 814 66

Clozapine has proven to be more effective than typical antipsychotics in treatment-refractory schizophrenic patients, and some evidence suggests that it may be particularly useful in treating the negative symptoms of schizophrenia. However, it is unclear whether this observation reflects improvement in "primary" or "secondary" negative symptoms. We hypothesized that a portion of clozapine's effect on negative symptoms would be related to an improvement in positive (psychotic and disorganization) symptoms, a decrease in extrapyramidal side effects (EPSE), and/or a decrease in depressive symptoms. The remainder of its effect would be related to a direct effect on the neural circuits or pathologic processes responsible for the negative symptoms. Twenty-nine treatment-refractory schizophrenics treated with clozapine for 6 weeks were studied. The core negative symptoms measured by the Scale for the Assessment of Negative Symptoms ([SANS] affective flattening, anhedonia/asociality, avolition/apathy, and alogia) all improved with clozapine treatment. Overall, there was a 31% improvement in negative symptoms, a 32% improvement in psychotic symptoms, and a 35% improvement in disorganization. The improvement in negative symptoms was correlated with improvement in disorganization, but not with improvement in psychotic symptoms, depression, or drug-induced EPSE. Although there was a correlation between improvement in negative symptoms and improvement in disorganization, there was a suggestion that the two are changing in parallel, but are independent of each other. It appears that at least a portion of clozapine's effect on core negative symptoms is mediated through a direct effect on the underlying pathophysiology of schizophrenia associated with negative symptoms.
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PMID:Clozapine's effect on negative symptoms in treatment-refractory schizophrenics. 814 34

Depressive patients often complain about dullness of taste of previously liked food items as well as of persistent bad taste. Taste and smell experience can be reflected by cognitive (psychophysical) indicators and also by reflectory (facial expressive) responses. In the present study 21 depressed, hospitalized patients and 16 control subjects were exposed to food-related gustatory and olfactory stimuli. Psychophysical and videotaped facial reactions were recorded from both groups. Analysis indicated that cognitive estimates of taste hedonics were similar for depressed and control groups; the former responded to sweet taste with a shorter-lasting facial reaction, involving markedly fewer facial features expressing enjoyment, than did controls. Aversive tastes, in contrast, triggered comparable facial expressive features of disgust in both groups. Facial reactions of depressed patients to acceptable and aversive olfactory stimuli were all significantly shorter and more muted than those of controls. Facial reflexes triggered by chemical cues are known to be controlled primarily by brainstem structures. Present findings suggest a possible influence of the profound anhedonia of severe depression on subcortical processes.
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PMID:Taste and odor: reactivity in depressive disorders, a multidisciplinary approach. 817 Jul 89

Psychiatric and neurological symptoms have been the target of many studies, but the emotional and behavioral modifications in HIV infection remain quite unknown. Working on the emotional dimensions and the heterogeneity of depressive mood, we were interested in evaluating the emotional symptomatology in HIV infected patients. Fifteen HIV-positive and fifteen HIV-negative homosexual men paired by age and educational level were studied. They were seen by two trained psychologists who assessed depression, anxiety and mood dimensions with the MADRS depression scale, Covi's anxiety scale, Depressive Mood scale, Abrams and Taylor scale for Emotional Blunting and Retardation scale. HIV-positive subjects had significantly higher scores of emotional blunting: anhedonia and hypoexpressiveness. Scores of depression, anxiety, irritability and hyperexpressiveness were not significantly different between both groups. Hypoexpressiveness scores were correlated to the CDC stages of the disease. This means that the emotional deficit seems to increase with the course of the disease, and is present in the absence of depression or anxiety. The question of the origin of this emotional blunting can be raised: is it the result of an adaptative behavior and/or the action of the virus on the central nervous system? Further studies are needed to confirm these results and answer this question.
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PMID:[Emotional disorders in HIV infection]. 823 25

Findings from computed tomography (CT), magnetic resonance imaging (MRI), positron emission tomography (PET), and single photon emission computed tomography (SPECT) studies of patients with depression suggest that this mood disorder is associated with regional brain dysfunction. The various elements of depression--dysphoria, anhedonia, helplessness, and sad affect--are all closely associated with changes in cerebral blood flow and/or metabolism in the frontal-temporal cortex and caudate nucleus. A compelling convergence of information from psychiatric and neurologic investigations indicates that depression is mediated by a restricted set of brain structures.
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PMID:The neuroanatomy of depression. 827 May 93

Clinical depression is associated with social, occupational and physical impairment and mortality. Furthermore, data are reviewed which have related the severity of depressive symptoms, such as anhedonia, psychic anxiety, panic attacks, alcohol abuse, insomnia and diminished concentration in depressed patients, to suicide within 1 year. By contrast, hopelessness, suicidal ideation, and prior suicide attempts were related to suicide within 2-10 years after examination, but did not correlate with suicide within the first year of follow-up. It is concluded that clinical depression continues to be associated with significant morbidity and mortality, despite progress which has been made in its treatment.
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PMID:The morbidity and mortality of clinical depression. 827 38


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