Page 52 - Edited - Webster HEAD AND NECK - part 2-Merge PDF

THE FACIAL (SEVENTH CRANIAL) NERVE 1:

IN THE (PETROUS) TEMPORAL BONE

ANTERIOR
FOSSA
PCPe
Possebor
LESSER WING CHHOB
PROCESS
DY GREATER WING
MIDDLE
FOSSA PCP

TYMPANIC
(MIDDLE EAR)
CAVITY (SHADED) FORAMEN
MAGNUM

PETROSAL NERVE: to middle fossa & V2 POSTERIOR

TYMPANIC FOSSA PETROUS
TEMPORAL
MEMBRANE RIDGE HN
("EAR DRUM")
(BLACK) FIRST BEND OR "KNEE": the
(SENSORY) GENICULATE GANGLION
IS FOUND HERE.
SEE HN

FACIAL CANAL: arises/begins at bottom of 249

INTERNAL AUDITORY MEATUS, INTERNAL
AUDITORY MEATUS ("tube") FACIAL NERVE
(CrN VII) SHARES INTERNAL AUDITORY SEE HN
MEATUS WITH CrN VIII.

FACIAL CANAL

SEE HN
SECOND BEND: FACIAL NERVE TURNS DOWNWARDS

TOWARDS STYLOMASTOID FORAMEN-which is the
CHORDA
TYMPANI external end of the facial canal.

leaves facial n. & enters tympanic cavity

THE PETROSAL & CHORDA TYMPANI NERVES ARE THE

PARASYMPATHETIC AXONS (TASTE & SECRETOMOTOR)
AXONS OF THE FACIAL NERVE: SEE HN.