Page 54 - Edited - Webster HEAD AND NECK - part 2-Merge PDF

HN 250 THE FACIAL NERVE (7th CRANIAL) -2 HN250
A.THE GREATER PART OF THE SKELETO-
MOTOR COMPONENT OF THE FACIAL NERVE
LEAVES THE STYLOMASTOID FORAMEN & When first exposed the
TURNS FORWARDS TO ENTER THE SUBSTANCE parotid salivary gland
1
OF THE PAROTID SALIVARY GLAND, & DIVIDE VII appears as a
INTO FIVE TERMINAL BRANCHES WHICH lobulated mass
EMERGE FROM THE ANTERIOR LIMITS OF
THE GLAND. wedged between
VII the masseter &
2
PAROTID sternocleidomastoid
DUCT ZYGOMA muscles. From its anterior
P border
A werge:
R MASTIOID (a)Sbraches of
FOR MASSETER MAXILLA O PROCESS The FACIAL
MUSCLE, T (VII cranial)
SEE
I nerve; &
D (b) the parotid
C
G duct, which can
L. be polpored
as it crosses the
4
VII
masseter m. to
ORBICULARIS BODY OF reach & piece
ORISM. MANDIBLE the buccinator
m. of the cheek
K.E.W.
BUCCINATORM. VII
5
The five branches of The facial nerve radiate like the digits of a hand, or a bird's foot
they are sometimes referred to as The "pes anserinus" ("goose's foot").

B. PAROTID GLAND
DISSECTED OUT SUPERFICIAL TEMPORAL
VII t. ARTERY & VEIN
ORBIT
EXTERNAL AUDITORY
NOTE: For VII z MEATUS
LYMPH NODES
see: HN ZYGOMA STYLOID PROCESS
PATHOLOGY
IN A MASTOID
SURGERY MAXILLA MASSETER PROCESS
MUSCLE
OF THE
PAROTID PHARYNX
SALIVARY (cross-hatched)
GLAND K.E.W.
ENDANGERS VII b BRANCHES OF THE
THE FACIAL FACIAL NERVE:
NEVE: “BELL'S STERNO- t - temporal
CLEIDO-
PALSY” (see VII m MASTOID z - zygomatic
later) BODY OF MUSCLE b - buccal
MANDIBLE m - mandibular
EXTERNAL c - cervical.
FACIAL VII c CAROTID ART.
ARTERY
The FACIAL NERVE leaves the stylomertoid foramen & turns forwards between
the styloid process (medially) & posterior belly of digastric muscle (laterally) to
enter The parotid salivary gland, & divides into 5 terminal branches supplying the
muscles of facial expression (including platysma) and buccinator m K.E.W.