How can we help?

You can also find more resources in our Help Center.

Cranial Nerves

Names and functions of the cranial nerves (veterinary).
STUDY
PLAY
I Olfactory
(S) Smell
II Optic
(S) Vision
III Oculomotor
(M) Most extraocular muscles (levator palpebrae, dorsal rectus, medial rectus, ventral rectus, ventral olbique mm.)
IV Trochlear
(M) Dorsal oblique muscle
V Trigeminal (Ophthalmic Branch)
(S) General sensation to skin of face, nasal cavity, protective innervation of eye (corneal reflex)
V Trigeminal (Maxillary Branch)
(S) General sensation to some of the skin of the face and part of nasal mucosa, completes afferent pathway of chewing reflex.
V Trigeminal (Mandibular Branch)
(B)
Afferent - Chewing reflex, sensation to rostral 2/3 of tongue, lower teeth, and mucosa of inner cheek
Efferent - Muscles of mastication
VI Abducens
(M) Lateral rectus & retractor bulbi mm
VII Facial
(B)
Afferent - taste for rostral 2/3 of tongue
Efferent - muscles of facial expression
VIII Vestibulocochlear
(S)
Vestibular - sense gravitational effects & movement
Cochlear - hearing
IX Glossopharyngeal
(B)
Afferent - Sensation and taste for caudal 1/3 of tongue and general sensation to pharynx
Efferent - Muscles of pharynx
X Vagus
(B)
Afferent - Sensory fibers to extenral acoustic meatus, respiratory tract, esophagus and upper digestive tract, and cardiovascular systems
Efferent - Muscles of larynx, pharynx, and esophagus
XI (Spinal) Accessory
(M) Muscles of the larynx, cleidomastoideus (dog), cleidocervicalis (dog), trapezius
XII Hypoglossal
(M) Tongue muscles (geniohyoideus, thryrohyoideus, stylohyoideus)