Infratemporal fossa (2)

8/3/2019 Infratemporal fossa (2)

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Insertion

Origin

Action

Fig. 36: Temporalis muscle


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Insertion

Origin

Action

Fig. 37: Masseter muscle


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Action

Action

Lateral pterygoid

Medial pterygoid

U

L

D S

Fig. 38: Lateral and medial pterygoid muscles


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Deep temporal n.

N. to masseter

Maxillary artery

Inferior alveolar

+ n. to mylohyoid

Posteriorsuperior

alveolar n.

Buccaln.

Pterygoid venous

plexus.

Medial pterygoid

Lingual + chorda tympani

Fig. 39: Important relations of the lateral and medial

pterygoid muscles


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Upper articular

surface

Articular disc

Lower articular

surface (head of

mandibular)

Synovial membrane

Fibrous capsule

Upper compartment

Lower compartment

Fig. 40: Temporomandibular joint


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Fig. (41): Maxillary artery

C

a

A

a

cb

d

5

2

3 4

1

i

v

v

E

D

B

ii

iiii

Maxillary artery

Superficial temporal

artery

External carotid

artery

Infraorbital Artery Branches

Amiddle superior

alveolar

Banterior superior alveolar

Czygomatic

Dorbital

Eterminal in the face

Branches of 1stpart

1deep auricular

2anterior tympanic

3middle meningeal

4accessory meningeal

5inferior alveolar

Branches of 2ndpart

adeep temporal

bpterygoid

cmasseteric

dbuccal

Branches of 3rdpart

iposterior superior

alveolar

igreater and lesser palatine

isphenopalatine

ipharyngeal

vartery of pterygoid canal


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Cavernous sinus

Emissary vein

Ophthalamic vein

Anterior facial

vein

Pteryogoid venous

plexus

Deep facial vein

Superficial temporal

vein

Maxillary

veins

Posterior

facial vein

Fig. 42: Pterygoid venous plexus:

Connections and communications


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Nerve to medial

pterygoid

Anterior divisionBuccal nerve

Nerve to temporal

Nerve to musseter

Nerve to lateral pterygoidPosteriordivision

Trunk

Inferior alveolar

Chorda tympani

Lingual nerve

Nerve to

mylohyoid

Nerve to anterior belly of digastric

Auriculotemporal

nerve

Nerve to medial

pterygoid

Nervous spinosum

Middle meningeal

artery

F. spinosum

Nerve to tensor tympaniNerve to tensor palati

Otic ganglion

Fig. 43: Mandibular nerve and otic ganglion


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Motor root

MandibularnerveF. oval

Lateral pterygoid

Medial pterygoid

last molar

Tongue

D

u

c

t

Deep part of

submandibularglande

Styloglossus

Hypoglossus

Submandibular

ganglion

Facial nerve

Chorda

tymponi

Fig. 44: Lingual nerve


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Inf. salivar nucleus G lossopharyngeal n.

Tympanic plexus

Lesser superficial

petrosal n.

F. ovole.

Otic ganglion.

Middle meningeal

artery

Auriculotemporal

nerveTo parotid gland

Tympanic branch

Nerve to medial pterygoid

Sensory root

Parasympathetic root

Sympathetic root

Tensor tympani Tensor palati

Fig. 45: Otic ganglion


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Fig. 46: maxillary nerve and sphenopalatine ganglion

Ptery

gopal

atine

fossa

I.T.

Fossa

Orbit Face

Facial

nerve

Trigeminal ganglion

Meningeal

PSAMSA

ASAa

e

b cd

*Vidiannerve

Internal carotid artery

and plexus around

zygomatic

a. Pharyngeal

b. greater palatine

c. lesser palatined. nasopaletine

e. orbital

* sphenopalatine ganglion


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Tongue

Styloid process

Anteriorbelly of

digasnic m.

Stylomandibular lig.Styloglossus m.

Stylohyoid

ligament

Stylohyoid m.

Stylopharyngens m.

Fig. (47): Styloid apparatus

Infratemporal fossa (2)

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