70 Messrs. Mott, Schuster, and Sherrington. [Mar. 28, 



As before, but with fine electrode : — 

 900 K.U.— 



8. Primary eversion of foot, followed by inversion ; movements of hip and knee. 

 8 (again). Slight eversion, then inversion. 



9. Slight flexion of hip and knee, movements of trunk (pelvis raised). 



8 (again). Movements of trunk, flexion of hip and knee, dorsal flexion of foot. 



8 (again). Extension of foot. 



9 (again). Marked extension of foot and extension of knee. 



Left Hemisphere. 



1000 K.U.— 



19a. Dorsal flexion of (right) foot, flexion of (right) hip and knee (walking move- 

 ments). 



196. As before ; more definite. 



Calcarine Region. {Both Hemispheres.) 

 Bipolar stimulation : distance between points widened to 6 mm. : — 

 8 cm. — 



1. Left hemisphere, just above polar end of calcarine ; slight movement of ej'eball 



upwards and to left. 

 2 (repeated). Movement of eyeball upwards and a little inwards. 



3. Right hemisphere, corresponding point to 1 ; movement of eyeball over to left in 



wavering manner. 



6 cm. — 



4. Eight hemisphere, mesial surface of pole ; movement of eyeball over to left, and 



somewhat downwards, dilation. 



5. Right hemisphere, outer surface (polar region) ; same result. 



6. Left hemisphere, similar point to 5 ; eyes move to right. 



7. Left hemisphere, at anterior extremity of external calcarine ; same result. 



Larynx. 



Left Hemisphere. — Bipolar stimulation : wide electrodes :— 

 6 cm. — 



26. Adduction of chords. 

 26 (repeated). Same results. 



26 (again). Adduction of both chords, but chiefly same side. 

 Bipolar stimulation (C. S. S. stimulating) : — 

 5 cm. — 



26. Slight adduction. 

 26a. Same as 26. 



The stimulation of the calcarine region of the occipital lobe was not 

 performed until the motor area had been mapped out, consequently the 

 cortex may not have been in such a favourable condition for excitation. 

 Unipolar excitation gave no definite results; the stimulation so given may 

 not have been diffuse enough. Bipolar excitation invariably produced 

 deviation of the eyes away from the hemisphere stimulated when one pole 

 was placed above and the other below the calcarine fissure ; the regions 

 stimulated extended from the mesial surface of the pole of the occipital 



