PubMed · 4089082
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A R Gellatly. 1985. Hemisphere specific effects in reasoning performance.. https://doi.org/10.1007/bf00309449
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Selective attention processes (N2 and P3 components of event-related potentials (ERPs)) have been shown to be impaired in depressed patients but findings have been mixed. Part of this variability might be explained by neurobiological factors. ERPs (Go/Nogo paradigm) were investigated in patients with remitted major depression in relation to S100B. S100B, an astroglial protein with neuroplastic properties, has been shown to be increased in depression. Its pathophysiologic role in depression, however, is not yet sufficiently understood. Patients with increased S100B serum levels (n=6) showed a normal N2- and P3-amplitude in contrast to a reduced N2- and P3-amplitude in patients with normal S100B serum levels (n=6). These findings provide evidence of a correlation between S100B levels and attentional processes in patients with recurrent depression and further substantiate S100B's role as a marker in the course of affective disorders.
A recent study has shown that information about the duration of brief time intervals acquired by one side of the brain is readily available to the other cerebral hemisphere in a patient in which the corpus callosum and the other forebrain commissures have been sectioned. This strongly suggests that the internal clock that measures time duration is subcortical, and that its output can be easily projected to both hemispheres via subcortical commissures.
Bimanual coordination, a prototype of a complex motor skill, has recently become the subject of intensive investigation. Whereas past research focused mainly on the identification of the elementary coordination constraints that limit performance, the focus is now shifting towards overcoming these coordination constraints by means of task symbolization or perceptual transformation rules that promote the integration of the task components into a meaningful "gestalt". The study of these cognitive penetrations into action will narrow the brain-mind gap and will facilitate the development of a cognitive neuroscience perspective on bimanual movement control.