MOTOK FUNCTIONS OF CEREBRAL CORTEX OF CAT 



191 



is at the anterior extremity of the motor field, near the median 

 line, and about 0.5 cm. posterior to the upper part of the olfac- 

 tory lobe. In cat 12, figure 12, it is in two portions, one near the 

 anterior end of the coronal fissure and the other anterior to the 

 inner end of the crucial sulcus, extending over the margin of the 

 hemisphere onto the median surface. On the left cortices, the 

 field for the head and neck is found as follows in the various 

 animals. Cat 10, figure 13, a very small area about 0.5 cm. 



o o o o o o o Head and neck. 

 Fore limb. 



. . Hind limb. 

 Trunk and tail. 



FIGS. 9, 10, 11, 12, 13, 14, 15, and 16. The illustrations show the extent of the 

 cortical areas in the hemisphere of the individual cats over which movements 

 of different segments were obtained. The parts inclosed by the full line show the 

 areas for trunk and tail; those inclosed by circles show the areas for the head 

 and neck, the dotted lines inclose the areas for the fore limb, and the lines of 

 dots and dashes show the areas for the hind limb. The figures 9, 10, 11, and 12 

 give results from the right hemispheres of cats 8, 9, 10, and 12, respectively; 

 figures 13, 14, 15, and 16 give the results from the left hemispheres of cats 10, 11, 

 14, and 15. 



In the figures, posterior is above, anterior is below; the left hemisphere is at 

 the right of each figure, and the right hemisphere is at the left. The lines rep-, 

 resent certain fissures. These are lettered in figure 9 as a key, the designations 

 being as follows: A, longitudinal fissure; B, crucial fissure; C, olfactory lobe; 

 D, lateral fissure; E, coronal fissure. 



