Cranium And Scalp

Front 1

What bones form anterior cranial fossa?

Back 1

Frontal bone anteriorly
Ethmoid bone centrally
Body and lesser wings of sphenoid posteriorly

Contains frontal lobes of brain

Front 2

What bones from middle cranial fossa?

Back 2

Anterior border is the lesser wing of sphenoid.
Posterior border is the petrous ridge of temporal bone.



Contains temporal lobes

Front 3

What bones form the posterior cranial fossa?

Back 3

Occipital bone mostly
Some contribution from sphenoid and temporal bones

Contains brain stem, cerebellum

Front 4

What are the five layers of the scalp?

Back 4

S Skin

C Dense Connective Tissue which contains the vessels and nerves of the scalp

A Aponeurosis where the frontalis muscle begins.

L Loose connective tissue containing emissary veins. Known as "danger layer" for infections.

P Pericranium, the outer connective tissue of the skull.

Front 5

What nerves supply the scalp?

Back 5

All three branches of the trigeminal (V)

More posteriorly, cervical nerves, such as the greater occipital and lesser occipital nerve.

Front 6

What arteries supply the scalp?

Back 6

3 direct branches from external carotid artery:
Superficial temporal artery
Posterior auricular artery
Occipital artery
(All three anastomose)

2 indirect branches of internal carotid artery:
Supraorbital artery
Supratrochlear artery
(These anastomose)

Front 7

Anterior and Posterior Clinoid Processes

Back 7

Parts of the sella turcica.

There is a tuberculum sellae associated with anterior clinoid, which is anterior to the concavity of the sella turcica.

Posterior clinoid is a lateral extension of the posterior portion of the sella turcica called the dorsum sellae.

Front 8

What is the Clivus?

Back 8

A fusion of the occipital and sphenoid bones. Looks like a slide, along which the brain stem lies. Brain stem lies just posterior to clivus.

Front 9

CFS

Back 9

Made primarily deep in the brain by choroid plexuses, and flows into the subarachnoid space. CSF leaves the brain and into the subarachnoid space around the spinal chord. Clinically indicates that CSF drawn from around the spine from a lumbar puncture can show problems in the brain (the spaces are confluent).

Front 10

Innervation of the Dura Mater?

Back 10

Trigeminal Nerve (V)

Front 11

Innervation of posterior fossa?

Back 11

CNX and cervical nerves that travel along the route of CNXII. This explains why neck injuries can result in headaches.