Trigeminal n. (CN V) -Ophthalmic n. (V1) [sensory]

Question 1

Lacrimal n. [L. lacrima, tear]

Answer 1

function- sensory innervation of the lacrimal gland and the skin overlying the lateral aspect of the upper lid, & postganglionic parasympathetic innervation of the lacrimal gland (via CN VII)

Question 2

Frontal n.

-Supraorbital n.

Answer 2

function- sensory innervation of the skin overlying the forehead

Question 3

Frontal n.

-Supratrochlear n.

Answer 3

function- sensory innervation of the skin overlying the medial aspect of the forehead

Question 4

Nasociliary n.

-Anterior ethmoidal n.

Answer 4

function- sensory innervation of the mucosa of the frontal and ethmoidal sinuses, the mucosa of the superior aspect of the nasal cavity, and the skin overlying the nose

Question 5

Nasociliary n.

-Posterior ethmoidal n.

Answer 5

function- sensory innervation of the mucosa of the sphenoid and ethmoidal sinuses and superior nasal cavity

Question 6

Nasociliary n.

-Long ciliary n.

Answer 6

function- sensory innervation of the eye, and postganglionic sympathetic innervation of the dilator muscle of the iris

Question 7

Nasociliary n.

-Short ciliary n.

Answer 7

function- sensory innervation of the eye, postganglionic sympathetic (pupil dilation) & postganglionic parasympathetic (cell bodies in ciliary ganglion) innervation of the constrictor smooth muscle of the iris and ciliary bodies of lens (accommodation; via CN III)

Question 8

Nasociliary n.

-Infratrochlear n.

Answer 8

function- sensory innervation of the skin overlying the bridge of the nose