THE NERVOUS SYSTEM 



537 



axonesform ihe fasciculus relroflexus of IMcyncrl to the iiiteTpeduncular ganglion, 

 situated more caudally (Fig. 350). There is also a commissura hahenularis 

 connecting the two ganglia. The stria tcrmiualis {stria cornea), another olfactory 

 connection, lies in the groove between the ventricular surfaces of nucleus 

 caudatus and thalamus. The tuber cinereum is seen projecting ventrally. 

 Dorsal to this are seen the corpora mammillaria containing lateral and mesial 

 nuclei. The mammillary body receives some fibres of the fornix (from the 

 rhinopallial cortex, sec below) and also fibres from the medial fillet and other 



(ulliQSolFacto 



Fig. 35Q. — Diagram of Olfactory Paths (von Bechterew.) A^, Root fibres of vagus; 

 ca, commissura anterior; cm, corpus mammillare; cp, tibres from nucleus habenulae to 

 posterior commissure ;/G, tract from corpus mammillare to Gudden's nucleus;_/t, fascicu- 

 lus mammillo-thalamicus; ^, fasciculus longitudinalis medialis;/r, fornix; /?</, fibres of 

 fornix longus; gh, nucleus habenulae; gi, ganglion interpedunculare; gp, gyrus pyriformis; 

 /, lemniscus medialis; m, fibres from Gudden's nucleus to substantia reticularis grisea; 

 na, nucleus anterior thalami; nG, Gudden's nucleus; nt, nucleus tegmenti (v. Gudden); 

 nX, nucleus motorius nervi vagi; pcE, pedunculus corporis mammillaris from fillet; qa, 

 corpora quadrigemina; r, fibres from nucleus tegmenti (v. Gudden) to nuclei of cranial 

 nerves; re, radix lateralis tractus olfactorii; rf, fibres of tractus olfactorius to trigonum 

 olfactorium; ro, radix medialis tractus olfactorii; s, fibres from ganglion interpedunculare 

 to nucleus tegmenti; so, area of trigonum olfactorium; th, thalamus; fro, tractus olfac- 

 torius; //, taenia thalami; .v, fasciculus retroflexus. 



