I. Olfactory, nerve of smell,—distributed in the mucous membrane of the nose.
II. Optic, nerve of sight,—distributes its branches to the eye ball.
III. Motor oculi,—motor of the eye.
IV. Patheticus,—assists in moving the eye.
V. Trigeminus,—nerve of sensation, motion, and taste.
VI. Abducens,—assists the movements of the eye.
VII. Facial (or nerve of expression),—moves the face, ear, palate, and tongue. By means of this nerve the tongue is directly connected with the brain, and receives its impulse of action therefrom.
VIII. Auditory,—nerve of hearing.
IX. Glosso-pharyngeal, nerve of sensation and taste,—it is distributed to the back of the tongue, middle ear, tonsils, and pharynx.
X. Pneumogastric,—the auriculo-laryngo-pharyngo-œsophago-tracheo-pulmono-cardio-gastro-hepatic nerve. It is a nerve of sensation and motion, probably receiving its motor influence from its spinal accessory.