Eye and Ear Muscle Innervation and Action

Question 1

Orbicularis Oculi (Action and Innervation)

Answer 1

Action: Closing of the eyelids

Innervation: Facial Nerve (CN VII)

Question 2

Levator Palpebrae Superioris (Action and Innervation)

Answer 2

Action: Opening of the eyelids

Innervation: Oculomotor Nerve (CN III)

Question 3

Superior Rectus (Action and Innervation)

Answer 3

Action: Looks up

Innervation: Oculomotor Nerve (CN III)

Question 4

Inferior Rectus (Action and Innervation)

Answer 4

Action: Looks down

Innervation: Oculomotor Nerve (CN III)

Question 5

Medial Rectus (Action and Innervation)

Answer 5

Action: Looks medially

Innervation: Oculomotor Nerve (CN III)

Question 6

Lateral Rectus (Action and Innervation)

Answer 6

Action: Looks laterally

Innervation: Abducens Nerve (CN VI)

Question 7

Inferior Oblique (Action and Innervation)

Answer 7

Action: Looks up and laterally

Innervation: Oculomotor Nerve (CN III)

Question 8

Superior Oblique (Action and Innervation)

Answer 8

Action: Looks down and laterally

Innervation: Trochlea Nerve (CN IV)

Question 9

What innervates the lacrimal gland during normal lacrimal secretion?

Answer 9

Facial Nerve (CN VII)

Question 10

What innervates the lacrimal gland during excessive lacrimal secretion?

Answer 10

Ophthalmic Branch of the Trigeminal Nerve (CN V)

Question 11

What innervates the Tensor Tympani Muscle?

Answer 11

Mandibular Branch of the Trigeminal Nerve (CN V)

Question 12

What innervates the Stapedius?

Answer 12

Facial Nerve (CN VII)