Ethmoid — location?
Unpaired, anterior skull base.
Ethmoid — joints?
Joins frontal, nasal, sphenoid bones.
Ethmoid — parts?
Cribriform plate, perpendicular plate, labyrinth, conchae.
Cribriform plate — CN I?
Transmits olfactory nerve (CN I).
Perpendicular plate — role?
Forms superior part of nasal septum.
Ethmoidal labyrinth — contains?
Air cells (ethmoidal sinuses).
Conchae — purpose?
Air filtration and warming.
Meatuses — location?
Below each concha.
Lamina papyracea —?
Thin part of ethmoid, medial orbit wall.
Sphenoid — location?
Central skull base.
Sphenoid — parts?
Body, lesser wings, greater wings, pterygoid processes.
Sphenoid — sella turcica?
Houses pituitary gland.
Lesser wings — features?
Form optic canals.
Greater wings — features?
Form temporal surface, foramina rotundum, ovale, spinosum.
Pterygoid processes — function?
Muscle attachment, shape pterygoid fossa.
Optic canal — location?
Between lesser and greater wings.
Temporal bone — parts?
Squama, zygomatic process, mastoid, petrous, styloid.
Squama — role?
Attachment for temporalis muscle.
Mastoid process — contains?
Air cells (mastoid air cells).
Petrous part — houses?
Inner ear structures.
Stylomastoid foramen — transmits?
Facial nerve (CN VII).
Temporal bone — main functions?
Protects hearing, balance organs, neurovascular structures.
Zygomatic process — articulates?
Zygomatic bone.
Meatus — meaning?
Passageway for mucous membranes.
Fornamen rotundum — nerve?
Maxillary nerve (V2).
Fornamen ovale — nerve?
Mandibular nerve (V3).
Fornamen spinosum — contains?
Middle meningeal artery.
Mastoid process — attached muscles?
Neck muscles like sternocleidomastoid.
Inner ear in petrous part — functions?
Hearing and balance.
Cranial bone ossification?
Endochondral ossification.
Cranium — bones forming?
Ethmoid, sphenoid, temporal, other bones.
Ethmoid — location?
Anterior skull base; nasal septum, orbit walls.
Sphenoid — role?
Houses sella turcica; central skull base.
Temporal bone — function?
Houses ear structures; forms lateral skull base.
Foramen rotundum — transmits?
V2 (maxillary nerve).
Optic canal — formed by?
Lesser and greater wings of sphenoid.
Mastoid process — contains?
Air cells communicating with middle ear.
Answer 22 questions on Cranial Bone Anatomy Fundamentals.
1. Which structure of the ethmoid bone contains olfactory foramina for cranial nerve I passage?
2. Which part of the ethmoid bone contains olfactory foramina that transmit the olfactory nerve (CN I)?
Go over the full study guide for Cranial Bone Anatomy Fundamentals.
Read the study guide →Upload your class notes and Revizly writes your flashcards in about a minute.
Flashcard maker