infratemporal fossa

2.  Masseter
 Temporalis
 Lateral pterygoid
 Medial pterygoid

3.  Quadrilateral
muscle
 Origin:
 Insertion:
 Nerve supply:
 Action:

4.  Boundaries:
 Contents:
1. Temporalis and its
fascia
2. Deep temporal
nerve and vessels
3. Auriculotemporal
nerve
4. Superficial temporal
vessels

5.  Fan shape
 Origin:
 Insertion:
 Nerve supply:
 Action:
 Temporal
fascia

6.  Boundaries
 Contents:
1. Lateral & medial
pterygoid muscles
2. Maxillary artery and
its branches
3. Pterygoid venous
plexus
4. Mandibular nerve
and its branches,
chorda tympany
nerve, otic ganglion

7.  Key muscle
 Origin:
 Insertion:
 Nerve supply:
 Action:
 Relations:

8.  Quadrilateral
muscle
 Origin:
 Insertion:
 Nerve supply:
 Action:

9.  Spasm of masseter in the TETANUS .
 Produce ‘lock jaw’

10.  Also known as
”internal
maxillary artery
 Origin within
parotid gland
behind the neck
of mandible
 Divided into 3
parts by lateral
pterygoid
muscle

11.  Between neck &
lateral pterygoid
muscle
 Related above
with auriculo-
temporal nerve
 Its branches
accompany
branches of the
mandibular nerve

12.  FIVE IN NUMBER
 Deep auricular A.
 Ant. tympanic A.
 Middle meningeal
A.
 Accessory
meningeal A.
 Inferior alveolar
(dental) A.

13.  Largest meningeal branch & clinically most important
 Course and relations

15.  Upward &
forward
 Lie either
superficial or
deep to the lower
head of the
lateral pterygoid
muscle
 Branches
accompany
branches of the
mandibular nerve

16.  FOUR IN NUMBER
 MUSCULAR
BRANCHES
 Deep temporal A.
two in number
 Pterygoid branches
 Masseteric artery
 Buccal artery

17.  Enters pterygo-
palatine fossa by
passing between
two heads of lateral
pterygoid through
pterygo-maxillary
fissure and divide
into branches
 Branches
accompany the
branches of
maxillary nerve

18.  SIX IN NUMBER
 Posterior superior
alveolar (dental) A.
 Infra-orbital A.
 Greater palatine A.
 Pharyngeal A.
 Artery of pterygoid
canal
 Spheno-palatine A.

19.  Network of veins around
and within lateral
pterygoid
 Drained by maxillary vein
 Peripheral heart to pump
stagnant blood by lateral
pterygoid contraction
 Communicate with
1. Inf. Ophthalmic vein
2. Cavernous sinus by
emissary vein
3. Facial vein