Flashcards: Cranial Bones: Anterior to Lateral — 35 cards

Ethmoid bone — location?

Unpaired, anterior skull base, between orbits

Ethmoid bone — what does it form?

Part of skull base, nasal septum, orbit wall

Ethmoid bone — articulations?

Frontal, nasal, sphenoid, maxillary bones

Sphenoid bone — location?

Central skull; articulates with all cranial bones

Ethmoid bone — parts?

Cribriform plate, perpendicular plate, lateral masses, conchae

Temporal bone — includes?

Squamous, mastoid, petrous parts

Cribriform plate — purpose?

Allows olfactory nerve (CN I) passage

Cribriform plate — function?

Passage for olfactory nerve fibers

Crista galli — role?

Attaches falx cerebri in meninges

Sella turcica — houses?

Pituitary gland

Perpendicular plate — function?

Forms superior nasal septum

Stylomastoid foramen — exits?

Facial nerve (CN VII)

Lateral masses — contents?

Ethmoidal air cells, conchae

Carotid canal — purpose?

Internal carotid artery enters skull

Sphenoid bone — location?

Central skull base, behind ethmoid

Sphenoid bone — parts?

Body, lesser wings, greater wings, pterygoid processes

Sphenoid bone — sella turcica?

Houses pituitary gland

Optic canal — position?

Between lesser wings of sphenoid

Foramina of sphenoid?

Rotundum, ovale, spinosum, optic canal

Pterygoid processes — invention?

Medial and lateral plates for muscle attachment

Temporal bone — location?

Lateral skull base, sides

Temporal bone — parts?

Squamous, mastoid, petrous

Squamous part — features?

Zygomatic process, mandibular fossa, articular tubercle

Mastoid part — features?

Mastoid process, mastoid air cells, foramen

Petrous part — contents?

Inner ear structures, internal acoustic meatus

Stylomastoid foramen — function?

Facial nerve (CN VII) exit

Carotid canal — contents?

Internal carotid artery

Temporal bone — muscle attachments?

Temporalis, sternocleidomastoid, digastric

Significance of temporal bones?

Hearing, balance, facial nerve path

Ethmoid & olfactory foramina?

Transmit CN I (olfactory nerves)

Sphenoid & sella turcica?

Houses pituitary gland, critical in endocrine function

Temporal & internal acoustic meatus?

Transmit facial and vestibulocochlear nerves

Temporal & stylomastoid foramen?

Facial nerve exits skull

Temporal & carotid canal?

Internal carotid artery entry into skull

Cranial bones — clinical relevance?

Fractures affect neurovascular structures and function