. Quarterly journal of experimental physiology and cognate medical sciences. edunder different experimental conditions, seem to us to lend hiscontention, although the latter is put forward on other evidence. On the whole, we should estimate that in the anthropoid brain theportion of the motor region which lies buried in the sulcus centralis andother fissures amounts to not less than about 35 per cent, of the wholemotor recrJon. The Excitable Cortex of the Chimpanzee, Oraii^-rtan. and Corilla 159 Remarks on the Grouping of the Responsesof the Motor Cortex. An occurrence met in some o
. Quarterly journal of experimental physiology and cognate medical sciences. edunder different experimental conditions, seem to us to lend hiscontention, although the latter is put forward on other evidence. On the whole, we should estimate that in the anthropoid brain theportion of the motor region which lies buried in the sulcus centralis andother fissures amounts to not less than about 35 per cent, of the wholemotor recrJon. The Excitable Cortex of the Chimpanzee, Oraii^-rtan. and Corilla 159 Remarks on the Grouping of the Responsesof the Motor Cortex. An occurrence met in some of our <*xporimonts was that in the courseof examination of gyrus centralis anterior some small art-a of its surfacemight exist whence the faradisation failed to evoke responses. An in-stance is figured in fig. 2, B, close to the genu inferius of sulcus appearance of the cortex at such a place would reveal to inspection noobvious circulatory disturbance: nor so far as we were aware had anydamage been inflicted there. But in many experiments the whole motor. Fig. 8.—Orang 2. A, left hemisphere; B, right hemisphere reversed for comparison with only of the responses obtaineil are entered ou the map. field systematically explored revealed no obvious gap in it. Beevor andHorsley in the brain of the orang they stimulated met with relativelylarge and numerous gaps of this kind, and supposed them characteristicof the motor area of the anthropoid brain. Franz records meeting withsmall areas not yielding responses in the motor field of the macaquemonkey. In our experience, a return later in the experiment to the smallarea which had not yielded responses found it still unyielding of an area was on several occasions ascertained to have no counterpartthat we detected in the hemisphere of the opposite side. Nor were theplaces of occurrence of such seemingly non-stimulable gaps the same inhemispheres of different individuals, a finding in conformity with
Size: 1744px × 1433px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookidqua, booksubjectphysiology
