Electrophysiological evidence for an L-shaped interhemispheric connection in the cat
Arq. neuropsiquiatr
; 47(4): 381-4, dez. 1989. ilus
Article
in En
| LILACS
| ID: lil-80103
Responsible library:
BR1.1
RESUMO
Transcallosal potentials evoked by electrical stimulation with rectangular pulses of 1 ms, 5 c/s and variable intensity were recorded from the cortical surface in cats anesthetized with ketamine hydrochloride. Sites of stimulation and recording were selected by means of a cartesian map of most of neocotex. In addition to the well known transcallosal projection pattern it was faund that stimulation of a restricted posterior area evokes low voltage potentials over the contralateral symmetric area while high voltage potentials are recorded from a few sites located at the ipsilateral anterior cortex and from the area symmetric as to the latter. This L-shaped transcallosal connection may be involved in complex cortical processes and is compatible with effective results of partial anterior callosotomies in patients whit multifocal epilepsy and frontal bisynchronism
Full text:
1
Index:
LILACS
Main subject:
Brain Mapping
/
Corpus Callosum
/
Evoked Potentials
Limits:
Animals
Language:
En
Journal:
Arq. neuropsiquiatr
Journal subject:
NEUROLOGIA
/
PSIQUIATRIA
Year:
1989
Type:
Article
/
Project document