Pons

Diagram of a longitudinal section through the pons, showing the relation of the nuclei for the ocular muscles. CQ, corpora quadrigemina; 3, third nerve; II I, its nucleus; 4, forth nerve; IV, its nucleus, the posterior part of the third; 6, sixth nerve. The probable position of the center and nerve fibers for accommodation is show at a and a’ for the reflex action of iris, at b, and b’; for the external rectus muscles, at c, c’. The lines beneath the floor of the forth ventricle indicate fibers, which connect the nuclei.

Downloads