Neuro Review- First Aid- pg 4-449 Flashcards
1
Q
- support, repair
- K+ metabolism
- removal of excess NTs
- help make BBB
- GFAP marker
- derived from neuroectoderm
- reactive gliosis in response to neural injury
A
astrocytes
2
Q
What makes myelin?
A
- CNS = oligodendrocytes
- PNS = Schwann cells
3
Q
oligodendrocyte
A
- myelinate axons in CNS- each one does many (30ish)
- predominant in white matter
- derived from neuroectoderm
- “fried egg” on H and E stain
- injured in MS, PML, and leukodystrophies
4
Q
- myelinate axons in CNS- each one does many (30ish)
- predominant in white matter
- derived from neuroectoderm
- “fried egg” on H and E stain
- injured in MS, PML, and leukodystrophies
A
oligodendrocyte
5
Q
Dx?
- type of scwannoma
- CN VIII (8)
- bilateral = neurofibromatosis type 2
A
acoustic neuroma
6
Q
CNs of taste?
A
VII, IX, X (7, 9, 10- solitary nucleus)
7
Q
- for pain and temp
- C = slow, unmyelinated
- Adelta = fast, myelinated
A
free nerve endings
8
Q
CN of motor to tongue?
A
XII (12)
9
Q
- large
- myelinated
- adapt quickly
- deep skin layers, ligaments, joints
- vibration/pressure
A
Pacinian corpuscles
10
Q
- large
- myelinated
- adapt slowly
- pressure/deep static touch/position sense
A
Merkel discs
11
Q
Each Schwann cell myelinates ____.
A
1 PNS axon
12
Q
syringomyelia
A
- cystic cavity in spinal cord
- damages commissural fibers first
- “cape-like” bilateral loss of pain and temp sensation in upper extremities
- most common C8-T1
- Chiari 1 malformation
- HAs and cerebellar symptoms
13
Q
What destroys Schwann cells?
A
Guillain-Barre syndrome
14
Q
Merkel discs
A
- large
- myelinated
- adapt slowly
- pressure/deep static touch/position sense
15
Q
Guillain-Barre syndrome
A
autoimmune Schwann cell destruction
rapid onset muscle weakness, sensory abnormalities in distal extremities
