An orbitofrontostriatopallidal pathway for morality: evidence from postlesion antisocial and obsessive-compulsive disorder.

INTRODUCTION: A detailed proposal is made to the effect that nonlesional antisocial personality disorder (APD) is, among other things, a dysfunctional hypomoralism and that nonlesional obsessive-compulsive disorder (OCD) is, among other things, a dysfunctional hypermoralism. METHOD: To provide an empirical test of this proposal, 25 previously published cases of acquired (post lesion) APD and 39 cases of acquired OCD are reviewed and compared with multivariate inference tests. RESULTS: The acquired APD patients most often present putamenal or pallidal lesions. CONCLUSION: The ensemble of neurobiological, endocrine, and behavioural traits in APD and OCD, as well as the distinct lesion sites in the acquired variants, support the notion of an orbitofrontostriatopallidal brain system underlying morality.

Cognitive-behavioural, pharmacological and psychosocial predictors of outcome during tapered discontinuation of benzodiazepine.

Eighty-six participants wishing to stop benzodiazepine and who met DSM-IV (Diagnostic and Statistical Manual of Mental Disorders, 4th ed. American Psychological Association, 1994) criteria for anxiety disorder or insomnia were assessed pre- and post-taper on clinical, pharmacological and psychosocial measures. An initial cohort of 41 participants received treatment as usual (taper only) plus physician counselling in the same clinic setting. A second cohort of 45 participants were randomly allocated to group cognitive-behavioural therapy (CBT) plus taper, or group support (GS) plus taper. At 3 months follow-up, the outcomes in both the CBT and the GS subgroups were equivalent. Intention to treat analysis revealed a slight advantage to the CBT over the GS group and the CBT group showed higher self-efficacy post-taper.Over all 86 participants, a high-baseline level of psychological distress, anxiety and dosage predicted a poor outcome, but increase in self-efficacy contributed to a successful outcome particularly in those with initially poor baseline predictors. Although there was a decrease in positive affect during preliminary stages of tapered discontinuation compared to baseline, there was no significant overall increase in negative affect.

[Evaluation of a program to help discontinuation of benzodiazepines]. / Evaluation d'un programme d'aide au succès de sevrage des benzodiazépines.

The efficacy of a new cognitive-behavioral group program to help discontinuation of benzodiazepines (PASSE) was evaluated by comparison to a group receiving only social support. Both programs lasted 20 weeks commencing with a preparatory period of one month and then tapering continually during 16 subsequent weeks until discontinuation. Forty-eight participants (24 in each condition) with a diagnosis of anxiety disorder took part in the study. These two active conditions were compared with a separate group of 41 people receiving standard tapering with physician counselling only. The results post-treatment supported the hypothesis that those receiving either of the two active treatments succeeded better in discontinuing benzodiazepines than those receiving the standard treatment. Among those completing the two active programs there was no difference in outcome between the social support and the cognitive behavioral (PASSE) group. However, when the rate of dropout was considered, the cognitive-behavioral group proved significantly superior than the social support group. The results suggest that a cognitive-behavioral program can help people wishing to discontinue benzodiazepines to psychologically tolerate the immediate effects of discontinuation.

Enhanced connectivity between visual cortex and other regions of the brain in autism: a REM sleep EEG coherence study.

Functional interregional neural coupling was measured as EEG coherence during REM sleep, a state of endogenous cortical activation, in 9 adult autistic individuals (21.1±4.0 years) and 13 typically developed controls (21.5±4.3 years) monitored for two consecutive nights in a sleep laboratory. Spectral analysis was performed on 60 s of artefact-free EEG samples distributed equally throughout the first four REM sleep periods of the second night. EEG coherence was calculated for six frequency bands (delta, theta, alpha, sigma, beta, and total spectrum) using a 22-electrode montage. The magnitude of coherence function was computed for intra- and interhemispheric pairs of recording sites. Results were compared by Multivariate Analysis of Variance (MANOVA). Each time the autistic group showed a greater EEG coherence than the controls; it involved intrahemispheric communication among the left visual cortex (O1) and other regions either close to or distant from the occipital cortex. In contrast, lower coherence values involved frontal electrodes in the right hemisphere. No significant differences between groups were found for interhemispheric EEG coherence. These results show that the analysis of EEG coherence during REM sleep can disclose patterns of cortical connectivity that can be reduced or increased in adults with autism compared to typically developed individuals, depending of the cortical areas studied. Superior coherence involving visual perceptual areas in autism is consistent with an enhanced role of perception in autistic brain organization.