Outer Ear
LENGTH of External Auditory Canal in cm
What is 2.5cm ?
Smallest BONE in the body
What is the STAPES?
PART of the inner ear that deals with hearing
Major blood SUPPLY to the pinna and EAC
What is EXTERNAL CAROTID ARTERY?
Another TERM for pars flaccida
What is SHARPNELL MEMBRANE?
The 3 OSSCICLES
What are the malleus, incus, stapes?
PART of inner ear that deals with balance
What are vestibular organs: SCC, utricle, saccule?
LAYER not present in pars flaccida
What is MIDDLE FIBROUS LAYER?
pH of cerumen
What is pH 6.0 to 6.5?
Eustachian tube is 1/3 (A) laterally and 2/3 (B) medially
What is A - BONY, B - CARTILAGINOUS?
The NUMBER of turns in a cochlea
What is 2 1/4 or 2 1/2?
Eustachean tube is angled by THIS MUCH in degrees from middle ear to nasopharyngeal opening
What is 45 DEGREES?
The EAC is 1/3 (A) laterally, and 2/3 (B) medially
What are A - CARTILAGINOUS and B - BONY?
Superior BOUNDARY of the middle ear (roof)
What is the TEGMEN TYMPANI?
THIS separates the scala tympani and scala media
What is BASILAR MEMBRANE?
PART of cochlea farthest from the oval window
Cosmetic DEFORMITY of pinna due to necrosis of cartilage
What is CAULIFLOWER EAR?
What are epitympanum, mesotympanum, hypotympanum?
FLUID that is low in K+ and high in Na+
What is PERILYMPH?
THIS innervates the skin of mastoid process, medial & lateral aspects of pinna
What is the GREATER AURICULAR NERVE?