148 DR. C. E. BEEVOR A^-Q MR. V. HORSLEY ON THE EXCITATION OF THE 
No. of 
square. 
Distance of 
secondary coil. 
Result. 
i 
1 
cm. 
10 
Both eyes turn to opposite side 
2 
10 
Both eyes turn to opposite side (more markedly than at No. 1) and 
open at the end of excitation 
3 
10 
Both pairs of eyelids blink, then both eyes turn to the opposite side 
4 
10 
Both pairs of eyelids blink, the mouth is strongly retracted to opposite 
side, tongue flattened, protruded, tip turning to the opposite side. 
Next opposite wrist flexed, doubtful movement of fingers j 
5 
10 
Both eyelids blink, both eyes turn to opposite side 
Mouth strongly I’etracted to opposite side, tongue protruded, tip to 
opposite side, opposite fingers and thumb flexed 
5' 
10 
Nil 
6 
10 
Mouth strongly retracted to opposite side. Tongue flattened, pro- 
truded to opposite side. Flexion of fingers (strong), flexion of 
fingers (slight). Flexion of wrist, doubtful flexion of elbow 
6' 
10 
Doubtful flexion of fingers 
7 
10 
Flexion of fingers, of thumb, of wrist, later mouth retracted to 
opposite side 
7' 
10 
Flexion of finger and thumb, later flexion of wrist. 
8 
10 
Flexion of fingers and thumb (very strongly), flexion of wrist, abduc- 
tion of shoulder 
8' 
10 
Flexion of fingers (less than 8) 
9 
10 
Flexion of fingers 
9' 
10 
Flexion of fingers and wrist, later eversion of ankle 
10 
9 
Flexion of all toes, plantar extension of ankle, later pronation of wrist 
10' 
9 
Very slight adduction of shoulder. Slight flexion of toes 
As will be seen on fig. 5, Plate 17, the length of the posterior limb of the internal 
capsule is 18 mm. It will now be convenient to show more plainly the extent of 
distribution of the fibres for each particular movement. 
Movement. 
Extends 
From— 
To— 
Eyes turn to opposite side. 
m. 
1 mas. 2 
m. 
5 
Eyelids closing (blinking). 
3 
5 
Retraction of angle of mouth to opposite side . 
4 
7 
Tongue flattened and tip dii’ected to opposite side 
4 
6 
Flexion of thumb. 
5 
8 
Flexion of fingers. 
5 
9' 
Flexion of wrist. 
4 
10 
Flexion of elbow. 
6 
Abduction of shoulder. 
8 
Adduction of shoulder. 
, , 
10' 
Flexion of toes.. 
10 
10' 
Eversion of ankle. 
9' 
Plantar extension of ankle. 
10 
That this order of arrangement of the fibres in the capsule is mainly correct we 
have no doubt, in the light of our experiments on the capsule of the Bonnet Monkey 
