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Asymmetry of interhemispheric responses evoked in the prefrontal cortex of the rat

✍ Scribed by Dr. H. Pérez; S. Ruiz; A. H. Ernández; R. Soto-Moyano

Publisher
John Wiley and Sons
Year
1990
Tongue
English
Weight
325 KB
Volume
25
Category
Article
ISSN
0360-4012

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✦ Synopsis

Interhemispheric responses of anesthetized rats were evoked in the prefrontal cortex of both cerebral hemispheres by electric stimulation of the homologous contralateral cortical region. Fatigability of interhemispheric responses to repetitive stimulation was lower in the right prefrontal cortex. Besides, re-cortex (PFC), because it has been shown that it has key roles in behavior (Brody and Pribram, 1978;Fuster, 1980); also, differential lateralization of the prcfrontal lobes in affective processes has been described (Davidson, 1982).

sponses recorded in the right hemisphere exhibited greater amplitude increments to double-shock stimulation. No significant differences in rheobase, chronaxie, and threshold current were observed when comparing responsiveness of both prefrontal cortices to single stimuli. Results suggest that brain lateralization in the rat could depend, in part, on synaptic functional asymmetries of the prefrontal cortex.

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