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Skin/MS > Dermatomes and Myotomes > Flashcards

Dermatomes and Myotomes Flashcards

1
Q

Dermatome

A

Unilateral area of skin innervated by sensory fibers of a single spinal nerve. Considerable overlap of adjacent dermatomes

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2
Q

Myotomes

A

Unilateral muscle mass receiving innervation from fibers conveyed by a single spinal nerve.

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3
Q

C5 dermatome

A

Shoulder

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4
Q

C6 dermatome

A

Thumb

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5
Q

C7 dermatome

A

Middle finger

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6
Q

C8 dermatome

A

Little finger

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7
Q

T4 dermatome

A

Nipple

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8
Q

T10 dermatome

A

Umbilicus

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9
Q

L5 dermatome

A

Medial foot

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10
Q

S1 dermatome

A

Lateral leg/foot

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11
Q

C5 myotome

A

Upper extremity abductors (deltoid, biceps brachii)

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12
Q

C5/6 myotome

A

Forearm flexors (biceps brachii, brachioradialis), forearm pronators

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13
Q

C7 myotome

A

Forearm extensor (triceps brachii), wrist extensors, finger extensors

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14
Q

C8/T1 myotome

A

Intrinsic hand muscles

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15
Q

L2 myotome

A

Thigh flexion (iliopsoas)

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16
Q

L3/4 myotome

A

Leg extension (quadriceps)

17
Q

L4/5 myotome

A

Foot dorsiflexors and toe extensors (anterior tibial muscles)

18
Q

S1/2 myotome

A

Foot plantar flexors and toe flexors (posterior tibial muscles)

19
Q

S2,3,4 myotome

A

Anal contraction

20
Q

Spinal cord nerve segment tested using reflex hammer on tendons of biceps and deltoid

A

C5

21
Q

Spinal cord nerve segment tested using reflex hammer on tendons of biceps and brachioradialis

A

C6

22
Q

Spinal cord nerve segment tested using reflex hammer on tendons of triceps

A

C7

23
Q

Spinal cord nerve segment tested using reflex hammer on tendons of quadriceps

A

L3/4

24
Q

Spinal cord nerve segment tested using reflex hammer on achilles tendon

A

S1/2

25
Q

L1 dermatome

A

groin

Skin/MS (4 decks)

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