Infratemporal Fossa & deep Muscles of Mastication

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Last GA Quiz - Critical Structures
Infratemporal Fossa & deep Muscles of Mastication

Review the following bony features:

Mandibular condyle and coronoid process

Mandibular ramus

Mandibular lingual

Mandibular foramen

Mylohyoid groove

Intratemporal fossa

Greater wing of sphenoid bone

Medial and lateral pterygoid plates (sphenoid bone)

Alveolar foramina (in maxillary bone)

Pterygomaxillary fissure

Middle cranial fossa

Foramen ovale

Foramen spinosum


mandibular ramus

inferior alveolar artery and nerve.

mandibular condyle

Lateral and medial pterygoid muscles

Maxillary artery and branches:

Deep temporal aa.

Inferior alveolar a.

Middle meningeal a.

Posterior superior alveolar a.

Descending palatine a.

Sphenopalatine a.

Infraorbital a.

V3 and branches:

Inferior alveolar n.

Nerve to Mylohyoid

Auriculotemporal n.

Lingual n.

Chorda tympani

Deep temporal nn.

Buccal n.

Joint capsule and lateral capsule

Articular disc

Mandibular fossa

Sphenomandibular ligament

Stylomandibular ligament

Interior of the Skull

superior orbital margins

external occipital protuberance

identify the meninges:

Dura mater

Arachnoid mater

Pia mater

Identify the blood supply to the brain:

Vertebral aa.

Basilar a.

Posterior cerebral aa.

Posterior communicating aa.

Internal carotid aa.

Anterior cerebral aa.

Anterior communicating a.

Dura Folds and Dural Venous Sinus System:

Falx cerebri

Tentorium cerebelli

Falx cerebelli

Diaphragma sellae

Superior sagittal sinus

Inferior sagittal sinus

Great cerebral vein

Straight sinus

Confluence of sinuses

Transverse sinuses

Superior petrosal sinus

Sigmoid sinus

Inferior petrosal sinus

Cavernous sinus
Cranial Features

Anterior Cranial Fossa:

Frontal bones, orbital plates

Crista galli

Cribriform plate and olfactory foramina

Anterior and posterior ethmoidal foramina

Lesser wings of sphenoid

Anterior clinoid processes
Middle Cranial Fossa:

Temporal bones (squamous and petrous portions)

Sella turcica

hypophyseal fossa

dorsum sellae

posterior clinoid processes

Optic canal

Superior orbital fissure

Foramen rotundum

Foramen ovale

Foramen spinosum

Foramen lacerum

Canal (hiatus) for greater petrosal nerve

Canal for lesser petrosal nerve

Posterior Cranial Fossa:

Occipital bone

Temporal bone

Petrous portion

Mastoid portions


Foramen magnum

Internal occipital protuberance

Internal occipital crest

Grooves for transverse and sigmoid sinuses

Internal acoustic meatus

Jugular foramen

Condylar canal

Hypoglossal canal

Identify 12 pairs of cranial nerves (floor of cranial cavity)

Identify the 3 divisions of CN V and the sensory ganglion

Craniocervical Region

Tectorial membrane

Cruciate ligament

Alar ligament

Posterior View

Sup, mid, infer pharyngeal constrictors

Styloid process



Hyoid bone

Thyroid cartilage

Internal and external carotid

Internal jugular vein

Cervical sympathetic trunk and ganglia

Cranial nerves IX-XII

Sensory ganglion of vagus nerve

Superior laryngeal nerves (from X)

Recurrent laryngeal nerves (from X)

Thyroid gland and inferior thyroid arteries

Review the following bony features:

Orbital margin

Supraorbital foramen

Infraorbital foramen

Optic canal

Superior orbital fissure

Inferior orbital fissure

Anterior and posterior ethmoidal foramina

periorbita (periosteum of the orbit)

Frontal nerve

Supraorbital nerve and artery

Supratrochlear nerve and artery

Levator palpebrae superioris m.

Superior rectus m.

Superior oblique m. and trochlea

Trochlear nerve

Nasociliary nerve

Anterior and posterior ethmoidal nerves

Lacrimal gland

Lacrimal nerve and artery

frontal nerve

levator palpebrae superioris

superior rectus

Medial rectus m.

Lateral rectus m.

Abducent nerve

Ciliary nerves

Ciliary ganglion (difficult to find)

Optic nerve

Inferior rectus m.

Oculomotor nerve

inferior orbital margin

inferior oblique muscle

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