G5G Dynamic Theory. 



and spasmodic twitching of the left ear. After the cessation of the more 

 violent spasms, the animal held up its head, opened its eyes wide with 

 the most animated expression and wagged its tail in a fawning manner. 

 The change was so striking that I and those about me at first thought 

 that the animal had completely recovered from its stupor. But notwith- 

 standing all attempts to call its attention by patting it and addressing it 

 in soothing terms, it looked steadfastly in the distance with the same 

 expression and continued to wag its tail for a minute or two, after which 

 it suddenly relapsed into its previous state of narcotic stupor. " 



FIG. 358. 



FIG. 358. Side view^ of Brain of Dog, showing points stimulated in Ferrier's experi- 

 ments. For explanation of figures refer to text. 



,r 



FIG. 359,-Side of Brain of Dog. 



I, II, III, TV First, Second, Third and Fourth Convolutions. 

 A. Fissure of Sylvius. D. Coronal gyms. 

 B. Crucial, or Frontal sulcus, T. Temporal lobe. 



O. Olfactory Lobe. 1, 4, 5. Are on the Sigmoid gyrus. 



C. Coronal fissure. 15. ( U ) Uncinate gyrus. 



1. Region of motor control of hind leg, advanced in walking. 



3. tail, wagging sideways. 



4. Center for retraction and adduction of fore leg. 



6. " shoulder, elevation and forward extension. Directly under 4 on same, 



gyrus is center for flexion of paw. 

 7, 11 .Centers for muscles for closure of eye. 



8. " mouth-retraction and elevation of opposite angle. 



9. Opening movements of mouth and tongue, also barking. 



II . Retraction of angle of mouth. 



12. Dilation of pupils and wide opening of eye. 



13. Movement of eyeballs to opposite side. 



14." Pricking up " or sudden retraction of opposite ear. 



15. Torsion of nostril on same side, as from irritation of nostril. 



