Head & Neck Anatomy: Cranial Bones Flashcards
How many cranial bones are there? (Not including 6 auditory ossicles of the middle ear)
8
Large plates on both sides of the skull
Parietal bones
Are parietal bones paired or unpaired
Paired
Very small midline bone, anterior to sphenoid bone
Ethmoid bone
Perforated plate that allows olfactory nerves to detect smell
Cribriform plate
Wedge shaped vertical midline plate, serves as an attachment for the meninges of the brain
Crista Galli
Bony protrusion on the lateral sides of the nasal cavity that form air tunnels
Superior nasal and middle nasal conchae
Butterfly shaped bone in the middle of the skull
Sphenoid bone
The sphenoid bone is divided into what 3 parts?
Lesser wing (top)
Greater wing (bottom)
Pterygoid process
Opening for maxillary division of the fifth (V) cranial nerve
Foramen rotundum
Opening for mandibular division of the fifth (V) cranial nerve
Foramen ovale
Opening for the middle meningeal artery
Foramen spinosum
Opening for the internal carotid artery
Foramen lacerum
Opening for the cranial nerve III, IV, VI and ophthalmic division of the fifth (V) cranial nerve
Superior orbital fissure
Small hook shaped bone inferior to the medial pterygoid plate
Hamulus
Area of the lateral sides of the orbits below the parietal bones
Temporal bones
Are temporal bones paired?
Yes
The temporal bones contain the ___ fossa for the TMJ
Articular fossa
Located behind the ear, serves as attachment for the sternocleidomastoid muscle (SCM)
Mastoid process
Sharp projection of bone just below the ear which serves as an attachment for the muscles and ligaments of the tongue
Styloid process
Posterior part of the skull. Articulates with the first cervical vertebra, the atlas.
Occipital bone
Smooth, curved projection on the bottom of the skull
Occipital condyle
Anterior part of the skull superior to the eyes
Frontal bone
What fossa is on the lateral part of the Supraorbital ridge.
Lacrimal fossa
Lacrimal fluid empties into the nasal cavity through the
Nasolacrimal duct
