684 



FUNCTIONS OF THE CEREBRUM 



. XLVIII. 



mapped out by the method of stimulation, are situated in the 

 neighbourhood of the crucial sulcus, which corresponds to the fissure 

 of Kolando in man. 



FIGS. 494 and 495. Brain of dog, | viewed from above and in profile. F, frontal fissure, sometimes termed 

 crucial sulcus, corresponding to the fissure of Rolando in man. S, fissure of Sylvius, around which 

 the four longitudinal convolutions are concentrically arranged; 1, flexion of head on the neck, in 

 the median line ; 2, flexion of head on the neck, with rotation towards the side of the stimulus ; 3, 

 4, flexion and extension of anterior limb ; 5, 6, flexion and extension of posterior limb ; 7, 8, 0, 

 contraction of orbicularis oculi, and the facial muscles in general. The unshaded part is that 

 exposed by opening the skull. (Dalton.) 



Coming next to the brain of the monkey, figures 496 and 497 

 are reproductions from Terrier. He marked out the surface into a 



