Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

Anatomy > Spinal Nerves > Flashcards

Spinal Nerves Flashcards

1
Q

Which innervation pathway brings information into the brain (CNS) from the environment (periphery)?

A

sensory (afferent)

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

Which pathway causes information to flow out of the CNS?

A

motor (efferent)

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

What does the CNS consist of?

A

brain

spinal cord

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

What does the PNS consist of?

A 
cranial nerves (12 pairs)
spinal nerves (31 pairs)
ganglia
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

collection of neuron cell bodies OUTSIDE the CNS

A

ganglion

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

How many pairs of cranial nerves?

A

12

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

How many pairs of spinal nerves?

A

31

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

Do sensory and motor innervation overlap?

A

no

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

Do sensory or motor neurons have a single axon that divides and has a ganglion between the 2 axon ends/

A

sensory

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

Which part of the neuron carries impulse out the the muscle to contract?

A

axon of motor neuron

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

Which type of innervation concerns the body wall?

A

somatic

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

Which type of innervation concerns the internal organs?

A

visceral

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

innervation to skeletal muscle and skin is what type of innervation?

A

somatic

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

innervation of the heart is what type of innervation?

A

visceral

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

Do the functional dichotomies of the NS intersect?

A

yes

  • somatic sensory
  • somatic motor
  • visceral sensory
  • visceral motor
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What are the functional dichotomies of the NS?

A

central vs. peripheral
sensory vs. motor
somatic vs. visceral

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

What is the target tissue of somatic motor innervation?

A

skeletal muscle

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

The diaphragm is which type of innervation?

A

somatic motor

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

Is somatic motor innervation conscious/unconscious?

A

conscious (voluntary)

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

How many neurons connect the CNS to the target muscle?

A

ONE

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

Which type of innervation carries info FROM skin and musculoskeletal system?

A

somatic sensory

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

Which type of innervation carries sensory info about external environment?

A

somatic sensory

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

Is somatic sensory innervation conscious/unconscious?

A

usually perceived consciously

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

How many neurons connect the sit of stimulus to the CNS in somatic sensory innervation?

A

ONE

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

Examples of somatic sensory stimuli:

A
  • pain (from cutting, tearing, crushing, inflammation, or burning- heat/chemical)
  • temp
  • touch
  • pressure
  • vibration
26
Q

stimuli that can be felt by the skin

A

somatic sensory stimuli

27
Q

Division of the mesoderm that gives rise to bone, skeletal muscle, and dermis (below head):

A

paraxial mesoderm

28
Q

How many pairs of somites are there?

29
Q 
Pairs of somites:
\_\_ occipital
\_\_ cervical
\_\_ thoracic
\_\_ lumbar
\_\_ sacral
\_\_ coccygeal
A 
4
8
12
5
5
3
30
Q

How many pairs of somitomeres?

31
Q

Which myotome gives rise to skin (dermis) and muscle?

A

dermamyotome

32
Q

the cells of the sclerotome give rise to what?

33
Q

epaxial dermamyotomes give rise to what?

A

intrinsic (deep) back muscles and dermis that covers them

NOTHING ELSE

34
Q

Which dermamyotomes give rise to intrinsic (deep) back muscles and dermis that covers them; NOTHING ELSE?

35
Q

hypaxial dermamyotomes give rise to what?

A

all other skeletal muscle and dermis below neck, including limbs

36
Q

Which dermamyotomes give rise to all other skeletal muscle and dermis below neck, including limbs?

37
Q

What must be available to each individual somite?

A

innervation and blood supply

38
Q

Do epaxial and hypaxial dermamyotomes have combined or separate supplies?

39
Q

In what way is the spinal cord segmented?

A

functionally

40
Q

Each level of the spinal cord has ___ ____ that serve the tissues that originate from the same pair, including a _____ pair.

A

cell bodies

somite

41
Q

Each _____ pair is associated with a pair of spinal nerves.

42
Q

Are each of the 31 pairs of spinal nerves associated with a pair of somites?

43
Q

In which direction are the spinal nerves numbered?

A

superior to inferior

44
Q

How many pairs of cervical spinal nerves?

45
Q

How many pairs of thoracic spinal nerves?

A

12 (T1-T12)

46
Q

How many pairs of lumbar spinal nerves?

47
Q

How many pairs of sacral spinal nerves?

A

5 (S1-S5)

**S5 = dermatome only

48
Q

How many pairs of coccygeal nerves?

A

1 (Co1) = dermatome only

49
Q

Which spinal nerves are dermatomes only?

A

S5 and Co1

50
Q

Which spinal nerves have somatic sensory components?

51
Q

Which spinal nerves have somatic motor components?

A

all EXCEPT S5 and Co1

52
Q

Why do S5 and Co1 not have somatic motor components?

A

don’t give rise to any muscle

53
Q

Which spinal nerves carry sympathetic axons?

54
Q

Which spinal nerves carry parasympathetic axons?

A

S2-S4 ONLY

55
Q

Where are cell bodies of somatic motor innervation located in the spinal cord?

A

ventral horn of SC gray matter`

56
Q

Somatic motor axons leave the spinal cord via the ______ ______ of the spinal nerves.

A

ventral roots

57
Q

What makes up the white matter of the SC?

A

myelinated axons

58
Q

What makes up the gray matter of the SC?

A

cell bodies

59
Q

What does the ventral root split into in somatic motor innervation?

A

ventral and dorsal ramus

60
Q

Intrinsic (deep) back muscles are derived from _____ dermamyotomes and are supplied by ____ _____.

A

epaxial

dorsal rami

61
Q

All other skeletal muscles below the head are derived from ______ dermamyotomes and are supplied by ____ ____.

A

hypaxial

ventral rami

Anatomy (7 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions