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Psychiatry and Mental HealthPharmacology (medical)Medicine (miscellaneous)Biological Psychiatry

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Die Poliomyelitis bei Jugendlichen und Erwachsenen
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The deleterious effect of ocular artefacts on the quantitative EEG, and a remedy
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The effect of ocular artefacts on spectral EEG parameters is assessed statistically. These artefacts are caused by movements of the eyeball and/or of the lid. Further, methods for correcting ocular artefacts are presented and evaluated. This methodological study is based on data from an investigation comparing the EEG of schizophrenic patients (n=17) with healthy controls (n=15). Ocular artefacts are monitored by the bipolar vertical and the biopolar horizontal electro-oculogram (EOG). It is shown that the influence of ocular artefacts on the measured electrical activity in the frontal region is larger than the cerebral potentials which the EEG is ideally intended to record. The more frequent occurrence of blinks and eye movements in schizophrenic patients may lead to an artificial enhancement of slow frequency EEG power for schizophrenics and eventually “false significant group differences when correcting for EOG artefacts than without it. This can be attributed to a very much inflated sample variability of the uncorrected EEG, due to the individually varying EOG power. We conclude that it may not be sufficient to select visually epochs for analysis that are considered artefact-free. Rather, one should monitor EOG artefacts and apply an appropriate correction.
Psychopathological rating scales for diagnostic use in adults with attention-deficit/hyperactivity disorder (ADHD)
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M. Rösler, W. Retz, J. Thome, M. Schneider, R.-D. Stieglitz, P. Falkai*
The diagnosis of attention-deficit hyperactivity disorder (ADHD) in adults is a complex procedure which should include retrospective assessment of childhood ADHD symptoms either by patient recall or third party information, diagnostic criteria according to DSM-IV, current adult ADHD psychopathology including symptom severity and pervasiveness, functional impairment, quality of life and comorbidity. In order to obtain a systematic database for the diagnosis and evaluation of the course ADHD rating scales can be very useful. This article reviews rating instruments that have found general acceptance. The Wender-Utah Rating Scale (WURS) and the Childhood Symptoms Scale by Barkley and Murphy try to make a retrospective assessment of childhood ADHD symptoms. The Connors Adult ADHD Rating Scales (CAARS), the Current Symptoms Scales by Barkley and Murphy (CSS), the Adult Self Report Scale (ASRS) by Adler et al. and Kessler et al. or the Attention Deficit Hyperactivity Disorder—Self Report Scale (ADHD-SR by Rösler et al.) are self report rating scales focusing mainly on the DSM-IV criteria. The CAARS and the CSS have other report forms too. The Brown ADD Rating Scale (Brown ADD-RS) and the Attention Deficit Hyperactivity Disorder-Other Report Scale (ADHD-OR by Rösler et al.) are instruments for use by clinicians or significant others. Both self rating scales and observer report scales quantify the ADHD symptoms by use of a Likert scale mostly ranging from 0 to 3. This makes the instruments useful to follow the course of the disease quantitatively. Comprehensive diagnostic interviews not only evaluate diagnostic criteria, but also assess different psychopathological syndrome scores, functional disability measures, indices of pervasiveness and information about comorbid disorders. The most comprehensive procedures are the Brown ADD Diagnostic Form and the Adult Interview (AI) by Barkley and Murphy. An instrument of particular interest is the Wender Reimherr Interview (WRI) which follows a diagnostic algorithm different from DSM-IV. The interview contains only items delineated from adult psychopathology and not derived from symptoms originally designed for use in children. Other instruments focus on functional impairment, quality of life, comorbid disorders, gender effects and specific psychopathological models.
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Is recurrent brief depression an expression of mood spectrum disorders in young people?
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The clinical relevance of Recurrent Brief Depression (RBD) has not received sufficient attention to date and continues to represent a controversial issue. The present study was carried out in a community sample to evaluate the lifetime prevalence of RDB, the degree of comorbidity, as well as possible risk factors. Subjects from a community survey in Sardinia (Italy) were randomly selected from registers of a rural, an urban and a mining area (n=1040, 461 males, 579 females). Interviews were carried out by physicians using the Italian version of the Composite International Diagnostic Interview Simplified which had been modified for the purpose of this study. Lifetime prevalence of RBD was 7.6%; 5.8% in males, 9% in females. Subjects aged 18 to 24 years presented higher frequencies (13.8%, OR 2.2) than those aged 25 or over. Comorbidity with Major Depression was particularly frequent. RBD was furthermore associated with suicide attempts and substance abuse, thereby constituting an effective health problem. Further epidemiological and clinical studies of RBD are warranted in order to develop specific treatments and prevention strategies.
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Obesity is highly prevalent worldwide and results in a high disease burden. The efforts to monitor and predict treatment outcome in participants with obesity using functional magnetic resonance imaging (fMRI) depends on the reliability of the investigated task-fMRI brain activation. To date, no study has investigated whole-brain reliability of neural food cue-reactivity. To close this gap, we analyzed the longitudinal reliability of an established food cue-reactivity task. Longitudinal reliability of neural food-cue-induced brain activation and subjective food craving ratings over three fMRI sessions (T0: 2 weeks before surgery, T1: 8 weeks and T2: 24 weeks after surgery) were investigated in N = 11 participants with obesity. We computed an array of established reliability estimates, including the intraclass correlation (ICC), the Dice and Jaccard coefficients and similarity of brain activation maps. The data indicated good reliability (ICC > 0.6) of subjective food craving ratings over 26 weeks and excellent reliability (ICC > 0.75) of brain activation signals for the contrast of interest (food > neutral) in the caudate, putamen, thalamus, middle cingulum, inferior, middle and superior occipital gyri, and middle and superior temporal gyri and cunei. Using similarity estimates, it was possible to re-identify individuals based on their neural activation maps (73%) with a fading degree of accuracy, when comparing fMRI sessions further apart. The results show excellent reliability of task-fMRI neural brain activation in several brain regions. Current data suggest that fMRI-based measures might indeed be suitable to monitor and predict treatment outcome in participants with obesity undergoing bariatric surgery.
Probleme der speziellen Pathopsychologie des Strafrechts
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