DEGENERATIONS FROM LESIONS OF TEMPORAL CORTEX. 165 



into the outer fifth of the pes pedunculi,reachingas low as the pons, 

 where it terminated bilaterally. Other scattered degenerations 

 were seen in the greater part of the posterior limbs of both 

 capsules. These were traced into corresponding parts of the 

 peduncles, and on into the pons. Fibres from this source were 

 contributed to the optic thalami, the substantia nigra, and 

 mesencephalic grey matter. (7) Lastly, in both fillets, crossing 

 from the internal capsules, and gradually disappearing in the 

 mid-brain. 



II. A laio of bilateral association seems to prevail in the com- 

 nmnications established bettveen a given area of cortex and all 

 other distantly situated masses of grey imttter with which it is 

 directly connected, ichether subserving ' motor ' or ' sensory ' 

 functions. 



H.B. — The expenses of this research have been defrayed by 

 grants from the , Eoyal Society and Eoyal Irish Academy. 

 Thanks are, in addition, due to the latter Society, in whose Pro- 

 ceedings the paper also appears, for the kind loan of the illus- 

 tration blocks. 



