Exam 1 SNAPP Qs and Practice Test Review Flashcards Preview

MS2 - Nervous System > Exam 1 SNAPP Qs and Practice Test Review > Flashcards

Flashcards in Exam 1 SNAPP Qs and Practice Test Review Deck (24):
1

Which cells are activated first by signals from damaged neurons?

Microglia

2

When neurons are damaged, the microglia are the first response cells to be activated and then the astrocytes take over. When does the microglia response end?

30 minutes after injury

3

What embryologic structure gives rise to Schwann cells?

The neural crest

4

What is allodynia?

The phenomenon in which normally innocuous stimuli (such as light touching) become painful

5

Hemiplegia in a stroke is most often due to occlusion of what vessel?

The middle cerebral

6

What three things speed up the conduction of action potentials down an axon?

Increased membrane thickness
Increased density of sodium channels
Increased axonal diameter

7

What is one side effect of muscarinic antagonists that was not depicted in the Sketchy diagram?

Erectile dysfunction (from scopalamine)

8

Medication that blocks the D2 and 5HT receptors is used to treat what condition?

Schizophrenia

9

The alar plate becomes the __________ and the basal plate becomes the ____________.

sensory area of the spinal cord; motor area

10

The sulcus limitans separates the ______________.

alar plate from the basal plate

11

What percentage of the sub-plate cells will die during development of the PNS?

100%

12

What percent of motor neurons die during development?

50%

13

Neurenteric fistulas and cysts result from failure of which process?

Regression of the neurenteric canal, leading to persistent communication between the amniotic sac and yolk sac

14

Where is the calcarine sulcus?

On the medial surface of the occipital lobe; it connects to the parieto-occipital sulcus

15

The basal and alar plates go on to form _______ matter.

gray

16

LCH is caused by abnormal __________, secreted by ____________.

reelin; Cajal-Retzius cells

17

Neonatal ___________ threshold is lower.

seizure

18

The most effective treatment for PTSD is ___________.

SSRI therapy

19

After ascending through the spinothalamic tract, the axons from pain neurons synapse on the _____________ in the thalamus.

ventral posterolateral nucleus (some also synapse on the periaqueductal gray matter)

20

Pain-carrying axons from the thalamus enter the ____________.

internal capsule

21

Fine-touch axons also synapse on the ______________, but first they pass through the ___________.

ventral posterolateral nucleus (in the thalamus); medial lemniscus

22

Where is the decussate?

At the spino-medullary junction

23

The primary motor neurons run through which part of the internal capsule?

The posterior limb

24

Is the corticospinal tract the lateral or ventral funiculus?

Lateral

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