Flashcards: Cranial Bone Anatomy and Clinical Significance — 33 cards

Ethmoid — what type of bone?

Unpaired, anterior skull base.

Ethmoid bone — location?

Anterior skull base, part of neurocranium and viscerocranium.

Cribriform plate — feature?

Has olfactory foramina for CN I.

Cribriform plate — function?

Transmits olfactory nerves (CN I).

Perpendicular plate — role?

Forms nasal septum; attaches falx cerebri.

Perpendicular plate — role?

Forms nasal septum, attaches to falx cerebri.

Ethmoidal labyrinth — contains?

Ethmoidal cells (sinuses); articulates with orbit and nasal cavity.

Sphenoid — key features?

Butterfly-shaped, central skull base, contains sella turcica.

Sphenoid — location?

Central, butterfly-shaped at skull base.

Sella turcica — houses?

Pituitary gland.

Sphenoid body — contains?

Sphenoidal sinuses, sella turcica.

Temporal bone — parts?

Squamous, petrous, mastoid parts.

Lesser wings — form?

Help delimit the optic canal.

Foramina — purpose?

Passageways for nerves and blood vessels.

Greater wings — include?

Foramina rotundum, ovale, spinosum.

Pterygoid processes — functions?

Attachment for pterygoid and palate muscles.

Temporal bone — location?

Lateral skull, protects hearing/balance organs.

Squamous part — features?

Attachment for temporalis muscle.

Mastoid process — contains?

Mastoid air cells; attachment for muscles.

Petrous part — houses?

Inner ear, internal acoustic meatus, carotid canal.

Internal acoustic meatus — transmits?

Facial (CN VII) and vestibulocochlear (CN VIII) nerves.

Olfactory foramina — pass through?

Olfactory nerves pass in cribriform plate.

Sphenoid sinus — location?

Bilateral air sinuses within sphenoid.

Sella turcica — purpose?

Houses pituitary gland.

Foramen rotundum — exits?

Maxillary nerve (V2).

Foramen ovale — transmits?

Mandibular nerve (V3).

Foramen spinosum — contains?

Middle meningeal vessels.

Jugular foramen — contains?

Sigmoid sinus, CN IX, X, XI.

Carotid canal — transmits?

Internal carotid artery.

Zygomatic process — forms?

Part of zygomatic arch.

Styloid process — attaches?

Stylohyoid ligament and muscles.

Temporal bone parts — main segments?

Squamous, mastoid, petrous.

Temporal bone — protection?

Houses ear, balance structures, key foramina.