Page 103 - Edited - Webster HEAD AND NECK - part 2-Merge PDF

HN 297
TENSOR TYMPANI & STAPEDIUS HN 297
MUSCLES
AUDITORY These two SKELETAL muscles
TUBE 1. protect the cochlea against overloading &
2. vary the properties of the acoustic
TYMPANIC impedance Hoveyounes

MEMBRANE (A) SUPERIOR VIEN WITH ROOF
REMOVED ANTERIOR
TENSOR
TYMPANI
(V3). Above
bony auditory
MALLEUS tulse. AROSES
TYMPANIC
CAVITY FROM INFERIOR
SURFACE OF
GREATER WING
OF SPHENOID
(SEE BELOW).

TYMPANIC PROMONTORY
MEMBRANE
(1 TURN OF
st
COCHLEA)
(B) TENSORTYMPANI M. CANAL FOR FOOTPLATE
TENSOR STAPEDIUS M. OF STAPES
CROSS SECTION TYMP.M (VII) ARTICULATING WITH
ATZ-Z OVAL WINDOW
PYRAMID
AUDITORY
TUBE
(BONY)
VERTICAL PART OF FACIAL
NERVE (RUNNING TO STYLO-
NERVE
TO MASTOID FORAMEN).
ADDITUS
STAPEDIUS
Z
FACIAL CANAL
TENSOR TYMPANIM.
IN ITS CANAL GREATERWING OF SPHENOID SCHEMATIC LONGITUDINAL
POSTERIOR SECTION
TYMPANIC AUDITORY TUBE
CAVITY CARTILAGINOUS ANTERIOR

Z MEDIAL PTERYGOID
PETROUS PLATE
TEMPORAL
K.E.W.
(C) INFERIOR VIEN OF
CRANIUM (CONTEXT POSTERIOR NASAL GREATER
APERT URES WING OF
SPHENOID

V 3
BODY OF
AUDITORY CARTILAGINOUS SPHENOID TENSOR
TYMPANI
TUBE BONY BSAI- FOR SPINOSUM
OCCIPITAL
BONY
C
AUDITORY
TUBE
ATTACHMENT OF
CAROTID
CANAL PHARYNGO- GROOVE FOR
BASILAR FASCIA CARTILAGINOUS PART OF
AUDITORY TUBE
(REMOVED) cf.