A reference handbook of the medical sciences, embracing the entire range of scientific and practical medicine and allied science . ses are found to be associated withthe destruction of the same parts ofthe cerebrum as the areas uponstimulation of which movements areproduced. The , it is impor-tant to note, are inabilities to makecertain definite tj-pes of combined movements, and notinabilities to move individual muscles. Thus there maybe paralyses for extension and not for flexion. Thesedefect phenomena vary with the part of the brain af-fected, those due to the internal capsule, and
A reference handbook of the medical sciences, embracing the entire range of scientific and practical medicine and allied science . ses are found to be associated withthe destruction of the same parts ofthe cerebrum as the areas uponstimulation of which movements areproduced. The , it is impor-tant to note, are inabilities to makecertain definite tj-pes of combined movements, and notinabilities to move individual muscles. Thus there maybe paralyses for extension and not for flexion. Thesedefect phenomena vary with the part of the brain af-fected, those due to the internal capsule, and to thepyramidal tract below the latter being more Anu5 & VeLgina Sulc Sulc calcarin CSS dfl Fio. —Cortical Motor Areas on Mesial Aspect of Brain of Chimpanzee.(Grunbaum and Sherrington.) The calcarine area, marked with vertical linesand designated EYES, gave complex associated movements of these small letters indicate occasional and irregular movements of foot and leg,ff; of shoulder and chest, s; of thumb and fingers, h. In only man and the higher apes are the paralysesentirely permanent, the effects being less and lessmarked as we go downward in the biological scale. Associated with the loss of the ability to make 403 Brain, Pbysiology of REFERENCE HANDBOOK OF THE MEDICAL SCIENCES certain movements after destructions of parts of thebrain, other secondary effects of these lesions are tobe noted. At first the paralyzed part can be movedby external agents, but some time after the beginningof a paralysis the part which cannot be moved volun-tarily becomes rigid and a contracture results. Thiscontracture phenomenon is found only in man an
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Keywords: ., bookauthorbuckalbe, bookcentury1900, bookdecade1910, bookyear1913
