Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Bio 40B > Spinal Cord & Spinal Nerves > Flashcards

Spinal Cord & Spinal Nerves Flashcards

1
Q

purpose of spinal cord and spinal nerves

A

mediate reactions and environment changes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

several functions of the spinal cord

A

> processes reflexes
site for integration of EPSPs and IPSPs that arise locally or are triggered by nerve impulses from the periphery and brain
conduction pathway for sensory impulses to the brain and motor impulses to effectorrs

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

anatomy of spinal cord (protection)

A

meninges, vertebra, and cushion of CSF

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

outermost layer of meninges of spinal cord

A

dura mater

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

middle layer of meninges of spinal cord

A

arachnoid mater

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

innermost layer of meninges of spinal cord

A

pia mater

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

what part of the spinal cord carries the CSF

A

subarachnoid space

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

spinal cord begins as a continuation of the ______ and terminates at about ___ in an adult

A

medulla oblangata; 2nd lumbar vertebrae

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

tapered portion of the spinal cord is the conus medullaris, from which arise the ___ and ___

A

filum terminale and cauda equina

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

how many pairs of spinal nerves

A

31 pairs

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

what tracts conduct nerve impulses toward the brain

A

sensory (ascending) tracts

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

what tracts conduct impulses down the cord

A

motor (descending) tracts

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

how many pairs of cervical nerves

A

8 pairs

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

how many pairs of thoracic nerves

A

12 pairs

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

how many pairs of lumbar nerves

A

5 pairs

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

how many pairs of sacral nerves

A

5 pairs

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

how many pairs of coccygeal nerves

A

1 pair

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

contains sensory nerve fibers and conducts nerve impulses from the periphery into the spinal cord

A

posterior or dorsal (sensory) root

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

contains motor neuron axons and conducts impulses form the spinal cord to the periphery

A

anterior or ventral (motor) root

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

single axon within an endoneurium

A

fiber

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

bundle of fibers within a perineurium

A

fascicle

22
Q

bundle of fascicles within an epineurium

A

nerve

23
Q

what are the branches of a spinal nerve

A

dorsal ramus, meningeal branch, and rami communicates

24
Q

do not enter into the formation of plexuses and are known as intercostal or thoracic nerves

A

anterior rami of T2-T12

25
Q

supplies the skin and muscles of the head, neck and upper part of the shoulders; connects with some cranial nerves; and supplies the diaphragm

A

cervical plexus

26
Q

damage to the spinal cord above the origin of the phrenic nerves ___ causes respiratory arrest

A

C3-C5

27
Q

constitutes the nerve supply for the upper extremities and a number of neck and shoulder muscles

A

brachial plexus

28
Q

supplies the anterolateral abdominal wall, external genitals, and part of the lower extremities

A

lumbar plexes

29
Q

largest nerve arising from the lumbar plexus is the

A

femoral nerve

30
Q

supplies the buttocks, perineum and part of the lower extremities

A

sacral plexus

31
Q

largest nerve arising from the sacral plexus (also the largest nerve in the body)

A

sciatic nerve

32
Q

highways for nerve impulse conduction to and from the brain

A

white matter

33
Q

receives and integrates incoming and outgoing info to perform reflexes

A

gray matter

34
Q

sensory info from receptors travels up the spinal cord to the brain along two main route

A

spinothalamic tracts and the posterior column tract

35
Q

motor info travels from the brain down the spinal cord to effectors along 2 types of descending tracts

A

direct pathways and indirect pathways

36
Q

fast, predictable, automatic response to changes in the environment that helps to maintain homeostasis

A

reflex

37
Q

5 functional components of a reflex arc

A

receptor, sensory neuron, motor neuron, integrating center neuron, and effector

38
Q

somatic spinal reflexes include

A

stretch reflex, tendon reflex, flexor reflex, crossed extensor reflex

39
Q

the spinal cord is held in place by the

A

filum terminale and denticulate ligaments

40
Q

dorsal root ganglion contains cell bodies of

A

sensory neurons

41
Q

what is true concerning the meninges

A

cover brain and spinal cord

42
Q

cell bodies of somatic motor neurons are found in which region of the spinal cord

A

anterior horn

43
Q

ventral root of a spinal nerve were cut, what would be the result in the region supplied by that nerve

A

loss of movement

44
Q

what is true concerning spinal nerves

A

posterior root contains sensory axons

45
Q

inferior to lumbar enlargement, spinal cord tapers to a conical portion called the

A

conus medullaris

46
Q

bundle of fibers located within the CNS is a

A

tract

47
Q

if you inserted a needle between the 3rd and 4th lumbar vertebra, you would probably hit the

A

cauda equina

48
Q

what branch of a spinal nerve forms the plexuses

A

ventral ramus

49
Q

spinal nerves are not part of the

A

CNS

50
Q

phrenic nerve arises from the __ plexus, and innervates the ___

A

cervical, diaphragm

51
Q

connective tissue sheath around a group of neuronal fibers is called the

A

perineurium

Bio 40B (25 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions