259 



6/7 1921 



12h. 



Reflexes of the semicircular canal : all present and symmetrical. 

 Tonic reflexes: all absent, asymmetry of cocaintest quite disappeared. 

 Decerebration, fair stiffness. 



Shifting from ventral to dorsal position : no trace of tonic labyrinth- 

 reflexes. Rotation of the head in lateral position : Typical cervical 

 reflexes, no labyrinth- reflexes. 



Cavia S. 



28/6 1921: 

 4/7 192J1 : 



7/7 1921: 



Injection 

 12h 30'. 



12h30V2'. 

 12h31'. 



12h31V2 

 12h33'. 



12h 34'. 



12h 341/2'. 



12h 36'. 



12h 38'. 

 12h 40'. 



12h 52' 



All labyrinth reflexes present and normal. 



Centrifugation : head up, chest inward, time 2 minutes, rate 1000 m. 

 per minute. 



Reflexes of semicircular canal: asymmetric reflexes. Rotation-reactions 

 on head and eyes with rotation to the right weak, with rotation to 

 the left strong. 



Progression-reactions: weak; extension of the legs even lacking. 

 Tonic reflexes: lacking, only slight ,,Grunddrehung" to the left. 

 Reflexes of semicircular canal : present and symmetrical. Progession- 

 reactions weak but present. 



Tonic reflexes: lacking, no more „Grunddehung". Sits symmetrically. 

 No eye-deviation. 



Dorsal position head in normal position towards the trunk; no diffe- 

 rence of tonus in the extremities 

 of cocain in the left middle-ear. 



Held up in the air, head down: dextro-rotation of head (stimulation 

 of the left labyrinth). 



Head down: head, in normal position, not turned. 

 Head down: levo-rotation of the head (incipient paralysis of left laby- 

 rinth). 



Head down : 60° levo-rotation of the head. 



When sitting, bead turned and flexed to the left: clock-hand move- 

 ments to the left, no nystagmus. 

 S downward, D upward ; no nystagmus. 



Marked eye-deviation, no nystagmus- no difference of deviation with 

 change of position of head in space. Head down: head turned 90= 

 to the left. 



Right lateral position : head in position 

 of normal sitting animal. 

 Left lateral position: head in dorsal 

 position. 



Dorsal position: head right lateral pos. 

 Head up : head left lateral position. 

 No nystagmus. 

 Rotation to the right and to the left : eye rotation reaction and nystagmus. 



, „ , „ „ B : head rotation reaction spositive. 



On the ground: clock-hand-movements to the left; pushed with expe- 

 rimentator's foot: rolling once to the left. 



Evident eye-deviation : for the first time very strong spontaneous ny- 

 stagmus, S anteriorly upward, D posteriorly downward. 



No change of the rotation 

 of the head with different po- 

 sition of the head in space. 



