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FUNCTIONAL NEUROANATOMY EXAM 2 | 242 QUESTIONS | WITH ALL PASSED SOLUTIONS, GRADED A+
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FUNCTIONAL NEUROANATOMY EXAM 2 | 242 QUESTIONS | WITH ALL PASSED SOLUTIONS, GRADED A+
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FUNCTIONALNEUROANATOMY
EXAM 2 | 242
QUESTIONS | WITH ALL
PASSED SOLUTIONS,
GRADED A+
Evatee 8/22/24 FUCTIONAL NEUROANATOMY
,FUNCTIONAL NEUROANATOMY EXAM 2 |
242 QUESTIONS | WITH ALL PASSED
SOLUTIONS, GRADED A+
Bony Encasement Answer - Part of skull and vertebrae; provides protection of
CNS from external injury
Three layers of the meninges; what kind of tissue? Answer - Pia mater,
arachnoid, and dura mater; connective tissue
What does Cerebrospinal fluid do? (3 things) Answer - Provides buoyancy
(shock absoption) to brain; source of nutrients and assists in waste removal;
97% weight reduction
What does the blood supply provide? (3 things) Answer - Oxygenation,
nutrition, and waste removal
What are the general features of the pia mater? Answer - Part of meninges
Thin membrane covering brain and spinal cord; dips into sulci; surface blood
vessels travel just above pia; smaller capillaries penetrate pia into brain
What are the general features of the arachnoid? (3 things) Answer - Part of
meninges
Thicker middle layer; doesn't follow contours but bridges major depressions;
creates subarachnoid space where CSF circulates
,What do enlargements of subarachnoid space form? Answer - Cisterns
What connects pia and arachnoid layers? Answer - Arachnoid trabeculae, thin
connective tissue threads
What are the general features of the dura mater?
Two layers? Answer - Part of meninges
Much thicker than other layers; inelastic; two sublayers
- Outer periosteal dura closely adhered to bone and to inner
- Meningeal dura
Are these sublayers of meninges fused or separate? Answer - Normally fused
but at certain sites, they separate to form fluid-filled sinus
What drains into sinuses? Name one prominent sinus Answer - CSF and venous
blood drain into the sinuses; prominent space at the midline is the superior
sagittal sinus
The meningeal layers of the dura fold inward and fuse to form? Answer - Dural
reflections
What is the purpose of dural reflections? Answer - Suspension system that
restricts movement of brain within skull; prevents largest brain structures from
hitting each other with blows to the head
What is the falx cerebri? Answer - Sickle of brain
, Lies within longitudinal fissure (corpus callosum crosses this fissure) and keeps
two cerebral hemispheres from hitting each other
What is the tentorium cerebelli Answer - Tent of cerebellum
Covers cerebellum and brainstem; ensures blows to head don't drive cortex
into cerebellum or brainstem
What are denticulate ligaments? Answer - An additional connective tissue
structure that attaches the meningeal layers together within the spinal cord
Lateral ventricles Answer - Backwards C-shape of the telencephalon; circulate
CSF
Third ventricle Answer - Lies within diencephalon; circulates CSF
Cerebral aqueduct Answer - Lies within mesencephalon; circulates CSF
Fourth ventricle Answer - Lies within pons and medulla; circulates CSF
Choroid plexus Answer - Within lateral, third, and fourth ventricles where CSF
is produced
How is choroid plexus formed? Answer - Invaginations of pia mater and
capillaries into ventricular space early in development when wall of neural tube
is thin
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