. The Journal of comparative neurology and psychology. e totally anesthetic toall forms of stimuli, heat and cold, light touch and pressures. Themiddle and forefingers were anesthetic for all forms of stimuli overthe two distal joints, both on the back and palmar parts. Thepalmar area corresponding to these two fingers was insensitive tolight touch, but pressures could be appreciated and well of a pin were painful. Up to this time there had appearedfrom time to time painful sensations following movements of thearm at the elbow, localized poorly, but apparently over the knuckle
. The Journal of comparative neurology and psychology. e totally anesthetic toall forms of stimuli, heat and cold, light touch and pressures. Themiddle and forefingers were anesthetic for all forms of stimuli overthe two distal joints, both on the back and palmar parts. Thepalmar area corresponding to these two fingers was insensitive tolight touch, but pressures could be appreciated and well of a pin were painful. Up to this time there had appearedfrom time to time painful sensations following movements of thearm at the elbow, localized poorly, but apparently over the knucklesof the middle, ring and little fingers and over the palm at the place Franz, Sensations folloirnig Nrrvc Division. 1^5 where these fingers join the pahn, Longitndinally the pains seemedto extend ahont three qnarters of an inch, bnt, as said al)()ve, no veryaeenrate localization can be made. In addition, heat (test tubewith water heated to 45° C.) did not produce a sensation over thearea insensitive to light tonch and over half of the nalmar part of. Fig. 4.—ILiiid sliowiiig areas insensitive to pressure, to li,i,lit toneli and totemperatures. the thumb. Cold was not ap])reciated over tlie same area, althoughthe test tube was cooled to 0^ 0., but there seemed to be a dissociationof the areas concerned with hot and cold sensations, for on the thumb,with the exception of the tip, no hot sensations were evoked, althoughcold was properly appreciated over the thiunb with the exceptionof the first joint. Fig. 4 illnstrates this condition. Il6 ^Journal of Comparative Neurology and Psychology. Movement sensations were tested as follows: The eyes of thepatient were closed or turned away so that he did not see what wasbeing done. The left Avrist was moved in the four possible directionsand he properly duplicated these mo^-ements with his right experiments on flexion and extension were made with thethumb, forefinger and second finger and similar results , ho^
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