13.2
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
