Anatomy of the CNS Flashcards
1
Q
2 Parts of human nervous system
A
- CNS
- PNS
2
Q
CNS
A
- lies in skull and vertebrae
- made of brain and spinal cord
- enables us to think, understand, remember, reason, etc.
- controls sensory discrimination and perception of stimuli
3
Q
PNS
A
- mostly outside the skull and vertebrae
- has two functional systems; somatic and autonomic
4
Q
Somatic
A
- conscious perception
- sensory perception
- volitional movements
- made of cranial nerves and spinal nerves
5
Q
Autonomic
A
- visceral system
- unconscious
6
Q
Protection of CNS
A
3 barriers
- skull/vertebrae
- meninges
- CSF
7
Q
Skull
A
- 8 joined plates
- cranial vault
- foramen magnum
8
Q
Cranial vault
A
- space within skull where the brain lies
9
Q
Foramen magnum
A
- hole at the base of the cranial vault that connects brain stem to the spinal cord
10
Q
Spinal Column
A
- made of 33 bones in 5 categories
11
Q
Cervical
A
17
12
Q
Thoracic
A
12
13
Q
Lumbar
A
5
14
Q
Sacral
A
5
15
Q
Coccygeal
A
4
16
Q
Meninges
A
- Made of 3 membranes
- Dura mater
- Arachnoid
- Pia Mater
17
Q
Dura Mater
A
- outermost
- lines the inner surface of the skull
- outer surface of the dura adheres to the skull
- no space around the dura, accumulations of fluid
- Epidural - bleeding above the dura
- subdural - bleeding below the dura
- dural reflection
18
Q
Falx cerebri
A
- between hemispheres
19
Q
Tentorium cerebelli
A
- between cerebellum and cerebrum
20
Q
Falx cerebelli
A
- splits cerebellum
21
Q
Arachnoid
A
- no blood vessels
- no reflections
- subarachnoid space filled with CSF
22
Q
Subarachnoid cistern
A
- large spaces between arachnoid and pia mater filled with CSF
23
Q
Pia mater
A
- closest to brain
- inner most
- inner surface contains no blood vessels, outside does
- subarachnoid hemorrhage
