Anatomy: Skull Flashcards
What does the cranium consist of?
Vault and floor
What is in between the outer and inner bone layer?
Diploie
What are the sutures?
Joints which unites the bones which make up the skull
Coronal suture?
Frontal-parietal
Sagittal suture?
Right and Left parietal bones
Lambdoid suture
Anterior parietal and posterior occipital
What is the significance of the pterion?
Thin bones in the area, middle meningeal artery grooves the bone, blow to the bone can result in extradural haemorrhages.
What does the pterion consist of?
Frontal-parietal-temporal-sphenoid
Describe the occipital bone
Flat, moulded to the posterior contour of the brain with an external projection posteriorly
What are the different branches/projections of the temporal bone?
Zygomatic process
Styloid process
Mastoid process
Petrous bone
Where is the styloid process located?
More anterior and deep to the mastoid, associated with deeper midline structures (oral cavity/pharynx)
Which key muscle attaches to the mastoid process
Sternoclenomastoid
Where is the petrous located?
Deep to the squamous part
What does the petrous bone form?
The floor of the cranium
What key nerve sits in the petrous bone?
Trigeminal ganglion
What are the branches of the trigeminal ganglion
Optic, maxillary and mandibular
Where is the sphenoid bone?
Inside the cranium contributing to the floor.
Which animal does it look like?
A bat with wings and body and pterogoid legs
What does the body of the sphenoid bone consist of?
Turkish saddle, depression in the body, not a sollid body, ornate front and back. The pituitary sits in the body
What are the divisions of the sphenoid wing?
Lesser wing: anterior and superior
Greater wing: posterior and inferior
