Tympanic Membrane

Question 1

Ceruminous glands

Answer 1

Apocrine sweat glands open into hair follicles and produce wax
Apocrine glands release their products by decapitation (budding off)
Molls glands are apocrine glands in eyelids

Question 2

Nerve supply of tympanic membrane

Answer 2

Lateral surface: anterior half- auriculotemporal nerve (cn V3)
Posterior half by auricular branch of vagus (cn X)

Medial surface: tympanic branch of glossopharyngeal nv ( Jacobson’s nv) (cn IX)

Question 3

During examination of ear, cough response is elicited due to stimulation of which nv

Answer 3

Vagus

Question 4

Relations of EAC

Answer 4

Superior- middle cranial fossa
Inferior- parotid gland
Anterior- temporomandibular joint
Posterior- mastoid air cell and facial nv

Question 5

Cough and scratching in the EAC is due to

Answer 5

Auricular branch of vagus

Question 6

Arnolds nv

Answer 6

Auricular branch of vagus

Question 7

Nv supply of external ear

Answer 7

Greater auricular nv (max supply to pinna)
Lesser occipital nv (upper part of medial surface of ear)
Auriculotemporal nv ( tragus, crus of helix )
Auricular branch of vagus (concha, post groove)
Facial nv- ‘’

Question 8

Cone of light is seen in

Answer 8

Anterio inferior quadrant of tympanic memb

Question 9

Sharpnells membrane

Answer 9

Pars flaccida (situated above lateral process of malleus)