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Neuroanatomy Lab > Section 4 Notes > Flashcards

Section 4 Notes Flashcards

1
Q

definition of myotome

A

the muscles that receive their motor innervation from a given spinal n. (dermatome is a sensory region of the skin that is innervated by a spinal n.)

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2
Q

spinal levels of lumbar plexus

A

l1-l4

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3
Q

what is innvervated by lumbar plexus

A

skin and muscles of the 1. lower abdominal wall in inguinal region 2. anterior and medial parts of the thigh

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4
Q

spinal levels of the lumbosacral plexus

A

l4-s4

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5
Q

what is innervated by the lumbosacral plexus

A
  1. gluteal region 2. posterior compartment of the thigh 3. all of the leg and foot
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6
Q

For the _____ region of the spinal cord, the spinal levels or spinal segments correspond with the corresponding vertebral level.

A

cervical

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7
Q

The spinal cord ends at the level of the ____ vertebra.

A

first lumbar

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8
Q

tthe cauda equina are the ____ below the level of the spinal cord

A

dorsal and ventral roots

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9
Q

the radial nerve is important for extension of ____

A

all joints in the arm and hand

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10
Q

_____ nerve is important for the thumb side of the hand and wrist (on the palmar side up)

A

median

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11
Q

peripheral mononeuropathy

A

injuries to an INDIVIDUAL PERIPHERAL NERVE arising directly from the plexus. (can be COMPLETE or INCOMPLETE)

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12
Q

radiculopathies involve a lesion to the

A

spinal nerve, a dorsal, or a ventral root.

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13
Q

A _________ is often associated with burning or tingling pain radiating down a limb in the dermatome of the affected nerve root.

A

radiculopathy

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14
Q

The straight-leg-raising test is often helpful for diagnosis of nerve root compression in the ____ region

A

lumbosacral

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15
Q

C5 X - decreased reflex in the ____

A

biceps

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16
Q

C6 X - decreased reflex in the ____

A

biceps, bracioradialis

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17
Q

C7 X - decreased reflex in the ____

A

triceps

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18
Q

C5 compression the disk involved is

A

c4-c5

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19
Q

C6 compression the disk involved is

A

c5-c6

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20
Q

C5 X - main weakness is in the

A

deltoid infraspinatus biceps

21
Q

C6 X - main weakness is in the

A

wrist extensors biceps

22
Q

C7 X - main weakness is in the

A

triceps

23
Q

L1 X - main weakness is in the

A

illiopsoas psoas hip flexion

24
Q

L2-L3 X - main weakness is in the

A

adduction of the thigh

25
Q

L4 X - main weakness is in the

A

tibialis anterior and posterior foot inversion

26
Q

L5 X - main weakness is in the

A

foot dorsiflexion hip abduction heel walk

27
Q

S1 X - main weakness is in the

A

foot plantar flexion tip to walk

28
Q

Decreased patellar (knee jerk reflex) is caused by ___ compression

A

l2-l3

29
Q

decreased achilles tendon (ankle jerk) is caused by ___ compression

A

s1

30
Q

the white or gray matter is centered in the spinal cord?

A

gray (the H)

31
Q

the intermediate zone of the spinal cord is composed of

A

sensory and mtoor functions

32
Q

larger more myelinated axons enter medially or laterally?

A

medially

33
Q

axons that carry _____ information enter the SC medially

A

epicritic

34
Q

axons that carry _____ information enter the SC laterally

A

nociceptive and temperature

35
Q

some small diamters axons pass through a few spinal segments via the _____, prior to synapsing in the dorsal horn.

A

lissauers tract

36
Q

damage to a nerve root may not cause complete paralysis because?

A

multiple nerve roots may innervate a single muscle (damage to a PERIPHERAL NERVE can cause completely paralysis

37
Q

Paresis means nerve root X or peripheral nerve X?

A

nerve root

38
Q

The amount of ____ matter is greatest in regions that innervate the limbs.

A

gray

39
Q

as you ____ the spinal cord, the amount of white matter increases

A

ascend rostrally

40
Q

where is the intermediolateral cell column found?

A

in the thoracic spinal cord (from T1-L2)

41
Q

where is clarkes nucleus found?

A

in the thoracic spinal cord (From T1-L2)

42
Q

The neurons of Clarke’s nucleus are the origin of the ____ tract.

A

dorsal spinocerebellar

43
Q

posterior or dorsal funiculus carries ___ information

A

epicrtici

44
Q

Corticospinal axons originating from neurons in the motor cortex terminate particularly in the more ____ portions of the intermediate gray,

A

lateral

45
Q

Corticospinal axons from sensory cortex terminate in the ____

A

dorsal horn

46
Q

ventral or anterior corticospinal tract. The axons from this pathway terminate____

A

bilaterally in the intermediate gray

47
Q

lateral corticospinal tract is more concerned with ____

A

discete individual digit mvoements and distal motor control

48
Q

anterior/ventral corticospinal tract is more concerned with ____

A

proximal muscle movementds

49
Q
A

Neuroanatomy Lab (36 decks)

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