Infratemporal Fossa and deep Muscles of Mastication
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Last GA Quiz - Critical Structures Dura Folds and Dural Venous Sinus System:
Falx cerebri
Infratemporal Fossa & deep Muscles of Mastication Tentorium cerebelli
Review the following bony features: Falx cerebelli
Mandibular condyle and coronoid process Diaphragma sellae
Mandibular ramus Superior sagittal sinus
Mandibular lingual Inferior sagittal sinus
Mandibular foramen Great cerebral vein
Mylohyoid groove Straight sinus
Intratemporal fossa Confluence of sinuses
Greater wing of sphenoid bone Transverse sinuses
Medial and lateral pterygoid plates (sphenoid bone) Superior petrosal sinus
Alveolar foramina (in maxillary bone) Sigmoid sinus
Pterygomaxillary fissure Inferior petrosal sinus
Middle cranial fossa Cavernous sinus
Foramen ovale
Foramen spinosum Cranial Features
masseter Anterior Cranial Fossa:
mandibular ramus Frontal bones, orbital plates
inferior alveolar artery and nerve. Crista galli
mandibular condyle Cribriform plate and olfactory foramina
Lateral and medial pterygoid muscles Anterior and posterior ethmoidal foramina
Maxillary artery and branches: Lesser wings of sphenoid
Deep temporal aa. Anterior clinoid processes
Inferior alveolar a.
Middle meningeal a. Middle Cranial Fossa:
Posterior superior alveolar a. Temporal bones (squamous and petrous portions)
Descending palatine a. Sella turcica
Sphenopalatine a. hypophyseal fossa
Infraorbital a. dorsum sellae
V3 and branches: posterior clinoid processes
Inferior alveolar n. Optic canal
Nerve to Mylohyoid Superior orbital fissure
Auriculotemporal n. Foramen rotundum
Lingual n. Foramen ovale
Chorda tympani Foramen spinosum
Deep temporal nn. Foramen lacerum
Buccal n. Canal (hiatus) for greater petrosal nerve
Joint capsule and lateral capsule Canal for lesser petrosal nerve
Articular disc
Mandibular fossa Posterior Cranial Fossa:
Sphenomandibular ligament Occipital bone
Stylomandibular ligament Temporal bone
Petrous portion
Mastoid portions
Interior of the Skull Clivus
superior orbital margins Foramen magnum
external occipital protuberance Internal occipital protuberance
identify the meninges: Internal occipital crest
Dura mater Grooves for transverse and sigmoid sinuses
Arachnoid mater Internal acoustic meatus
Pia mater Jugular foramen
Identify the blood supply to the brain: Condylar canal
Vertebral aa. Hypoglossal canal
Basilar a. Identify 12 pairs of cranial nerves (floor of cranial cavity)
Posterior cerebral aa. Identify the 3 divisions of CN V and the sensory ganglion
Posterior communicating aa.
Internal carotid aa.
Anterior cerebral aa.
Anterior communicating a.
Craniocervical Region
Tectorial membrane
Cruciate ligament
Alar ligament
Posterior View
Sup, mid, infer pharyngeal constrictors
Styloid process
Stylopharyngeus
Stylohyoid
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
Orbit
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
