434 



ANATOMY IN A NUTSHELL. 



course to the cortex. This route is direct and conveys cutaneous and painful 

 sensations. 



LESSON (XXIX. (Plate CCXXX). 

 (4.) This route is indirect because it passes through the cerebellum. Neu- 

 rones of the first order carry impulses to nuclei gracilis et cuneatus by way of 

 i i; vers ok Goll and Btjrdach just as in the direct route. From here neurones 

 of the second order through the restiform bodies (inferior peduncles of the cere- 

 bellum) of the same or opposite side to the vermis, giving off collaterals to the 

 nuclei in the cerebellum, such as nucleus dentatus. Impulses now pass from 



PLATECCXXX1I. 



OPTIC NERVE 



INTERNAL CAROTID ARTERY I OPHTHALMIC ARTERY 



\ / ANTERIOR CLINOIO PROCESS 



TROCHLEAR NERVE \ / / rn „ r 



\ \ / / TROCHLEAR NERVE. 



DIAPHRAGMA SELLAE "^^^^^^T^nA ^gSS? ^/W'M/^^M^P^—— LACHRYMAL BRANCH 



PITUITARY FOSSA. -J|f ^FIW \ ."' (R^^f^/ ft - ' f ^T 



■7^Ju\ '" 'f^'fiS. ■":;:•- A-.^^-^p' -^>'-^V^^-l0CUL0-M0T0R NERVE. -SUP. DIVISION 



ll^^.X 1 /^^^'\ ::: ^-V5^ ~ g ^ 3x// NASAL BRANCH OF OPHTHALMIC NERVE 



SPHENOIDAL SINUS ^m^^y^My^m^ x - ■" - ■ "---■^S— ^3^y\^^0CUL0-M0T0R NERVE (INF. DIVISION; 



ADUCENT NERVE^^^^y^ftQ-X^^^^__ "' ^ ABDUCENT NERVE 



SPHENOID B0NEs£— ^J^^Tp-J^ MAXILLARY DIVISION OF TRIGEMINAL NERVE 



INTERNAL CAROTID ARTERY/ /(^a r ^y »f'*pT^/^. N \\^^^ H 



CAVERNOUS SINUS / / / \ \ \ 



' / / \ \ FORAMEN OVALE 



OPHTHALMIC DIVISION OF TRIGEMINAL NERVE / / \ \ 



/ / \ INFERIOR MAXILLARY DIVISION OF TRIGEMINAL NERVE 



SOP. MAXILLARY DIVISION OF USEMINAL NERVE — ' / \ 



INF. AXILLARY DIVISION OF TRIGEMINAL NERVE ' MOTOR RO 



The Cavernous Sinus (Modified from Cunningham.) 



the vermis to the nucleus dentatus by way of neurones of the third order. From 

 t he nucleus dentatus impulses pass to the red nucleus of the opposite side through 

 the superior peduncles. This is done by means of neurones of the fourth order. 

 From the red nucleus neurones of the fifth order pass to the optic thalamus. 

 From the optic thalamus neurones of the sixth order pass to the cortex. 



!■">.! These Impulses pass in the direct cerebellar tract (fasciculus 

 spino-cerebellaris dorso-lateralis) then through the inferior peduncles of the 

 cerebellum to the vermis of the same and opposite side by means of neurones of 

 the second order. Collaterals are given off to the nucleus dentatus. From 

 the vermis neurones of the third order pass to the nucleus dentatus and from 

 here by in urones of the fourth order to the red nucleus. From the red nucleus 

 to the optic i hah) inns by n< urones of the fifth order and from the optic thalamus 

 to the cortex by neurones of the sixth order. Neurones of the first order trans- 

 mit impulses to cells in the columns of Clark by the way of collaterals. This 

 route is indirect because it passes through the cerebellum. 



