Exam 3: External Ear Flashcards
Feature between Inf crus of antihelix and helix
Cymba concha
Cavity leading to EAM
Concha
“Goat’s beard” of auricle
Tragus
Palpable post projection corresponding to concha of auricle
Eminentia concha
Palpable pos projection of eminentia concha of auricle
Ponticulus
Extrinsic Muscles of auricle
Ant auricular
Sup auricular
Post auricular
Temporoparietalis
Branches of external carotid artery supply auricle
Occipital
Post auricular
Superficial temporal.
OPS
Sensory Innervation of auricle derived from
Greater auricle C2, C3 Lesser occipital C2 Auriculotemporal, mandibular div trigeminal Post auricular cutaneous nerve, facial Auricular nerve, vagus
Sensory info from ear carried in spina branches to neurons in what ganglion
Dorsal nerve root ganglion
Auricle innervated by branches of which CN
Trigeminal
Facial
Vagus
Sensory info from auricle carried in facial nerve to neurons in what ganglion
Semilunar or geniculate
EAM lies between
Concha of auricle and tympanic membrane of middle ear
Part of EAM protected by cartilage
Lateral 1/3
Medial part of EAM protected by
Temporal bone
Skin lining EAM contains what modified sebaceous gland
Ceruminous glands