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.
Testez vos connaissances avec un QCM de 19 questions sur Cranial Bone Anatomy and Clinical Significance.
1. Which part of the ethmoid bone contains the olfactory foramina that transmit the olfactory nerves?
2. Which bone is unpaired and located at the anterior skull base, contributing to both the neurocranium and viscerocranium?
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