II The Peripheral Nervous System
1. Cranial Nerves. Nervi Cerebrales
I. N. Olfactorius—The fasciculi of the olfactory nerves arise from the olfactory bulb (Fig. 144, a) and pass through the foramina of the cribriform plate, upon which the bulb lies, to be distributed to the olfactory mucous membrane of the nose.
II. N. Opticus—The second nerve or optic (Fig. 138, II) arises from the optic chiasma (Fig. 138, c), passes through the optic foramen, and extends in an S-shaped curve to the eyeball. Its course is craniodorsad. It pierces the sclerotic and choroid coats of the eye and spreads out into the retina.