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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
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