13.2

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The dura mater is the strongest of the meninges and its composed of two layers called?

Meningeal layer and periosteal layer

The meningeal layer is immediately superficial to the

arachnoid

The arachnoid mater, also called the

arachnoid membrane

The term arachnoid means "resembling a spider web," and this meninx is so named because it is partially composed of a delicate web of collagen and elastic fibers, termed the

arachnoid trabeculae

The dura mater and the bones of the skull may be separated by a potential epidural space, which contains the

arteries and veins that nourish the meninges and bones of the cranium

The brain is both protected by the

bony cranium and from the meninges

Hematoma and epidural hematoma increase the size of the

brain

Immediately deep to the arachnoid mater is the subarachnoid space, which contains

cerebrospinal fluid

The cranial meninges enclose and protect some of the blood vessels that supply the brain, and help contain and circulate what fluid?

cerebrospinal fluid

these double layers of dura mater are called

cranial dural septa

The pia mater iis the innermost of the

cranial meninges

The meningeal layer is usually fused to the periosteal layer, except in specific areas where these two layers separate to form large, blood-filled spaces called

dural venous sinuses

Hematomas typically result from ruptured veins caused by

either fast or violent rotational motion of the head

An epidural hematoma is a pool of blood forming in the

epidural space of the brain, usually due to a severe blow to the head.

There are four cranial dural septa: the

falx cerebri, tentorium cerebelli, falx cerebelli, and diaphragma sellae

The brain has a unique blood-brain barrier to prevent entry of

harmful materials into the brain from the blood

Hematoma

is a pooling of blood outside of a vessel

meninges are protective connective membranes tissue that surround

partition portions of the brain

The periosteal layer, the more superficial layer, forms the

periosteum on the internal surface of the cranial bones

The arachnoid mater lies external to the

pia mater

From deep (closest to the brain) to superficial (farthest from the brain), the cranial meninges are the

pia mater, the arachnoid mater, and the dura mater

bony cranium provides

rigid support

cranial dural septa

separate specific parts of the brain and provide additional stabilization and support to the brain

Cerebrospinal fluid (CSF) acts as a cushioning fluid between

specific layers of meninges

The subdural space becomes an actual space if blood or fluid accumulates there, a condition called a

subdural hematoma

Between the arachnoid mater and the overlying dura mater is a potential space, the

subdural space

A subdural hematoma is a hemorrhage that occurs in the

subdural space between the dura mater and arachnoid mater.

The pia mater is what type of connective tissue?

thin layer of delicate areolar connective tissue that tightly adheres to the brain and follows every contour of the brain surface

The cranial meninges contain how many conective tissue layers? And what do they do?

three connective tissue layers that separate and support the soft tissue of the brain from the bones of the cranium


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