A Dictionary of psychological medicine giving the definition, etymology and synonyms of the terms used in medical psychology, with the symptoms, treatment, and pathology of insanity and the law of lunacy in Great Britain and Ireland . erstood if they are taken in somedefinite order, and the order which is mostconvenient is that of the degree of evolu-tion of function, and the part of the brainalong which to group these functions isthe fissure of Rolando. Beginning at the medium surface it hasbeen found, in the monkey, by Horsley andSchafer (Fig. 2) that besides movementsof the limbs, the trunk
A Dictionary of psychological medicine giving the definition, etymology and synonyms of the terms used in medical psychology, with the symptoms, treatment, and pathology of insanity and the law of lunacy in Great Britain and Ireland . erstood if they are taken in somedefinite order, and the order which is mostconvenient is that of the degree of evolu-tion of function, and the part of the brainalong which to group these functions isthe fissure of Rolando. Beginning at the medium surface it hasbeen found, in the monkey, by Horsley andSchafer (Fig. 2) that besides movementsof the limbs, the trunk muscles of theopposite side of the body are thrown into Brain [ 154 ] Brain action when the part of the marginalgyrus opposite to the ascending frontalconvolution is stimulated. According toDr. Terrier, in the cortex next to thispart, on the outer surface, are the upperends of the ascending frontal and parie-tal convolutions, in which are repre- and in front by a line drawn from the prae-central sulcus upwards to the middleline (Fig. 3). Below the area for the re-presentation of the upper limb there is anarrow strip of cortex which Mr. Horsleyand the writer (Fig. 3) found to give themovement of closure of the opposite eyelids. sented the movements of the lower limbas far out and down as the horizontallevel of the superior frontal sulcus, and asfar forwards as the vertical limit of theprffi-central sulcus (Fig. 1). Below thisarea is the part for the Iepresentation ofthe upper limb, occupying the ascending and also those of the same side when thecurrent was stronger. Below this partand between the Rolandic fissure and theprae-central sulcus, elevation of the oppo-site angle of the mouth is obtained,while round the lower end of this fissure,retraction of the angle of the opposite side Fig. 3.
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