F. Podivinsky et M. Jergelova, BIOELECTRICAL ASPECTS OF SENSORIMOTOR INTEGRATION - DISCUSSION OF OWNRESULTS AND LITERATURE DATA, Homeostasis, 34(1-2), 1993, pp. 65-75
Sensorimotor integration was studied on the base of three separate typ
es of bioelectrical phenomena in the nervous system and their changes
in different behavioural situations: Enhancement of the Bereitschaftsp
otential (BP) and the contingent negative variation (CNV) by the incom
ing stimuli; a supposed role of SEPs in sensorimotor integration with
a voluntary movement; modulation of human long-latency reflexes depend
ing on instruction and task. - The results showed facilitation of both
the H-reflexes and the BP during the preparatory period of a voluntar
y flexion of the fingers. Similar changes were found during developmen
t of the CNV. The slow potential shifts represent an excitatory state
of the cortex and facilitate the start of a motor act. - Further exper
iments indicated that the movement gating process of sensory informati
on seems to affect the input not only to the sensory cortex, but also
to the motor cortex and might play, together with an enhancing effect
on N 18 component of SEPs produced by movement, a significant role in
sensorimotor integration and motor control. - The long-loop phenomena
mediated, at least partly. via transcortical pathways, function as the
interface between central sensorimotor structures and neuro-muscular
periphery.