Ivi Journal of Comparative Neurology 



The Auditory Centre. 



C. K. Mills (in l^rain LVI,) concludes, as a result of clinical testi- 

 mony, that the centre for word-hearing is situated in the caudal third of 

 the first and second temporal convolutions, its exact position being in 

 line with or just cephalad of the caudal extremity of the horizontal branch 

 of the fissure of Sylvius. 



Soul Blindness in the Dog. 



RiCHET (see literature) reports a case of experimental psychical 

 blindness in which the autopsy showed bilateral injury to the gyrus ecto- 

 sylvianus and a small part of the gyrus sylvianus, which accordingly are 

 considered the psychical visual centre. 



Functions of (janglion Cells of the Cervical Cord.i 



After an historical and topographical introduction the author dis- 

 cusses the histological and histochemical reactions of the of the various 

 kinds of cells in the cervical region of the foetal and adult man, gorilla, 

 hedgehog, mole, shrew, bat, and rabbit. The cord was hardened in Miiller's 

 fluid and cut in serial sections of 20 micros thickness and then stained 

 with naphtylamin brown. The cells of the various regions were counted 

 and. grouped in accordance with their size and color preference. Thus 

 the author recognizes chromophilous cells which stain deeply and chro- 

 mophobic cells which resist the stain. He concludes that the more com- 

 pletely the cell is subordinated to the influence of the brain, the more 

 highly chromophile it is. The chromophobic cells are more independ- 

 ent. The energy and complexity of the motion of the muscles controlled 

 varies with the number and size of the cells of the region. The niduli 

 of the dorsal muscles extend throughout the entire length of the spinal 

 cord in the median column. The accessory nidulus lies laterad of this 

 from the medulla to the sixth or seventh segment. The phrenic nidulus 

 is in the third to fifth or sixth segments between the above, but phrenic 

 fibres also arise from the mesal dorsal groups. The brachial nidulus lies 

 in the lateral portion and begins in the third or fourth segment and ex- 

 tends into the first or second dorsal segment. The cephalic portion is 

 broken up into several groups, supplying the muscles of the shoulder 

 girdle and flexors and extensors of the fore arm ; the caudal part is di- 



1. (). Kaiser, Die FuiKtioiu'n der (JannHonzelk'n dos Ilalsiuarkus. The Ilaag, 

 1891. 



