HEAD & NECK: Middle ear muscles

Question 1

Stapedius - origin

Answer 1

Pyramidal eminence of tympanic cavity

Question 2

Stapedius - insertion

Answer 2

Neck of stapes

Question 3

Stapedius - innervation

Answer 3

Nerve to stapedius muscle (of facial nerve (CN VII))

Question 4

Stapedius - function

Answer 4

Dampens vibrations passed to cochlea via oval window

Question 5

Tensor tympani - origin

Answer 5

Cartilaginous part of auditory tube, Greater wing of sphenoid bone, Petrous part of temporal bone (semicanal for tensor tympani muscle)

Question 6

Tensor tympani - insertion

Answer 6

Handle of malleus

Question 7

Tensor tympani - innervation

Answer 7

Nerve to medial pterygoid muscle (of mandibular nerve (CN V3))

Question 8

Tensor tympani - function

Answer 8

Pulls handle of malleus medially, Tenses tympanic membrane