Topic 14 nerve supply

Question 1

what is the nerve supply of the cornea?

Answer 1

Trigeminal nerve (CN V)

Nerve ending is in sub-epithelial region and extend to mid stroma

Question 2

what is the nerve supply of the uveal tract?

Answer 2

Trigeminal nerve (CN V) for all 3 structures of the uveal tract

Oculomotor nerve (CN III) for iris and ciliary body

Question 3

what is the nerve supply of the sclera?

Answer 3

trigeminal nerve (CN V)

Question 4

what is the nerve supply of the retina?

Answer 4

Optic nerve (CN II)
transmits impulses from the retina to the brain

Question 5

what is the nerve supply of the conjunctiva?

Answer 5

Trigeminal nerve (CN V)

Question 6

what is the nerve supply of the eyelids? ( upper eyelid, lower eyelid, OO muscle, riolan muscle, LPS)

Answer 6

Trigeminal nerve (CN V): upper eyelid, lower eyelid

Facial nerve (CN VII ): Orbicularis oculi muscle, Riolan muscle, lower eyelid

Oculomotor nerve (CN III): LPS muscle

Sympathetic branch: Muller’s muscle

Question 7

what is the nerve supply of the eyebrows?

Answer 7

Facial nerve (CN VII)

Question 8

what is the nerve supply of the lacrimal apparatus?

Answer 8

Trigeminal nerve (CN V): Tear secretion by lacrimal gland

Facial nerve (CN VII): Tear drainage

Question 9

what is the nerve supply of the forehead muscles?

Answer 9

Facial nerve (CN VII)

Question 10

what is the nerve supply of the EOM? 3, SO4,LR6

Answer 10

MR: inferior division of oculomotor (CN lll) ‘

LR: abducens nerve (CN Vl)

SR: superior division of oculomotor (CN III)

IR: inferior division of oculomotor (CN lll) ‘

SO: trochlear nerve (CN IV)

IO: inferior division of oculomotor (CN lll) ‘

Question 11

What are the 6 nerves u gotta know? (OOTTAF) Are they sensory or motor or both?

Answer 11

CN 2:  optic nerve (s)
CN 3: oculomotor nerve (m)
CN 4: trochlear nerve (m)
CN 5: trigeminal nerve (both)
CN 6: abducens nerve (m)
CN 7: facial nerve  (both)