Cranial Bones

Nikhil Dhall
Mind Map by , created about 5 years ago

Mind Map on Cranial Bones, created by Nikhil Dhall on 09/16/2014.

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Nikhil Dhall
Created by Nikhil Dhall about 5 years ago
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Cranial Bones
1 Frontal
1.1 supraorbital margin "ridge" - ridge on top of eye socket. Can break blood vessels here forming black eye
1.2 Supraorbital foramen - small hole on ridge for nerves and blood vessels
1.3 Orbital surface - forms top of eye socket
1.4 frontal sinuses - cavities of air cells in bone. Located in bridge of nose by forehead and eyebrows.
2 Parietal
2.1 Superior temporal line
2.2 inferior temporal line
3 Temporal
3.1 zygomatic process - forms half of cheek bone and joins with temporal process on zygomatic bone
3.2 mastoid process - bump behind your ear. Sternocleidomastoid attachment point. Has air cells (sinus) that connect with middle ear.
3.3 styloid process - very pointy downwards. Attachment point for many ligaments and muscles.
3.4 external acoustic meatus - large hole that opens to external ear canal and ends at ear drum.
3.5 Internal acoustic meatus - visible in sagittal view. Where nerve for balance exits
3.6 Mandibular fossa - jaw joint under zygomatic process.
3.7 Stylomastoid foramen - Facial nerve CN 7 near mastoid and styloid process.
3.8 Jugular Fossa (foramen) - jugular vessel passing. Forms Jugular foramen when joined with occipital bone.
3.9 carotid canal - anterior to jugular fossa. Where INTERNAL carotid artery enters brain.
3.10 Petrous portion - houses inner ear structures for hearing and balance. Vestibular cochlear nerve CN 8 passes.
4 Occipital
4.1 Foramen magnum - large hole that connects spinal cord and brain stem
4.2 occipital condyle - articulates with 1st cervical vertebrae. Helps to nod head
4.3 External occipital protuberance - bump on the back of your head. Ligament attaches here to 7th cervical vertebrae to hold head upright.
4.4 Nuchal lines - trapezius muscle attachment
4.5 Hypoglossal canal - under the occipital condyle. Allows passage of CN 12 to control tongue.
5 Sphenoid
5.1 sphenoidal sinus
5.2 superior orbital fissure - hole lateral to sphenoidal sinus. Allows passage for 3 ocular CN nerves.
5.3 optic canal - CN2
5.4 cella tursica - saddle for brain on interior surface of bone
5.5 foramen rotundum - listed anterior to posterior
5.6 foramen ovale
5.7 foramen spinosum
5.8 Greater/lesser wings
6 Ethmoid
6.1 Christa Galli - forms nasal cavity and orbit of eye. Connects to "seat belt" of brain.
6.2 foramina - lots of foramen in cribiform plate. Olfactory nerves CN1 and ocular CN2 pass.
6.3 lateral masses - contains ethnoid sinuses (side of your nose)
6.4 nasal concha - forms turbulentia that create turbulence in air to help mucus trap dust ect.
6.5 perpendicular plate - nasal septum (divide bone into 2 cavities).
7 Sutures
7.1 Lambdoid: occipital and parietal bones. Sutural bones grow in gap.
7.2 Coronal - parietal and frontal bone
7.3 sagittal - parietal bone suture
7.4 Sqamous - parietal and temporal bone

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