STRYCHNINE NEURONOGRAPHIC STUDIES ON THE CORTICAL ACOUSTIC AREAS OF DOG

抄録

1) The existence, plentifulness and direction of the direct fiber connexions between ipsi-and contralateral acoustic cortical subareas of dog were examined by means of strychnine neuronography.
2) By local strychninization of MES, direct fiber connexions from MES to the ventral half of ipsilateral PES and AES were disclosed. The more posterior was the strychninized region in MES, the more frequent and marked were the spikes in AES.
3) Local strychninization of the dorsal half of PES revealed direct fiber connexions only to the ventral half of PES. On the contrary, by local strychninization of the ventral half of PES, direct connexions from there to the dorsal half of PESas well as to MES and AES were found.
4) By local strychninization of AES, direct connexions from AES to MES andthe third area were found.
5) The interrelations between the third area and other areas were not clearly confirmed, because local strychninization was not applied to the third area. 6) As to the acoustic areas on both hemispheres direct fiber connexions were found only between homotopic regions.