Dermatomes and Myotomes Flashcards

1
Q

Myotome

Deltoid

A

C5

Shoulder flexion and abduction

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2
Q

Myotome

Elbow flexion

A

C5, C6

Biceps Brachii

Shared with wrist extensors (ECRL, ECRB)

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3
Q

Myotome

Elbow extension

A

C7

Triceps Brachii

Shared with wrist flexors (FCU: Flexor carpi ulnaris, FCR: Flexor carpi radialis)

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4
Q

Myotome

FCU

A

C8

Ulnar deviation

Shared with Extensor carpi ulnaris (ECU)

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5
Q

Myotome

Interossei

A

C8

Digit abduction and adduction

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6
Q

Myotome

Hip flexion

A

L2, L3

Iliopsoas

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7
Q

Myotome

Quadriceps

A

L2, L3, L4

Knee extension

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8
Q

Myotome

L4

A

Ankle dorsiflexion

Tibialis anterior

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9
Q

Myotome

S1

A

Plantarflexion, Eversion

Gastrocnemius; Peroneus longus, Peroneus brevis

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10
Q

Myotome

L5

A

Great toe extension

Extensor Hallucis Longus (EHL)

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11
Q

Dermatome

C2

A

Occipital protuberance

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12
Q

Dermatome

C3

A

Supraclavicular fossa

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13
Q

Dermatome

C4

A

Acromioclavicular joint

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14
Q

Dermatome

C5

A

Lateral epicondyle

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15
Q

Dermatome

C6

A

Thumb

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16
Q

Dermatome

C7

A

Middle finger

17
Q

Dermatome

C8

A

Little finger

18
Q

Dermatome

T1

A

Medial epicondyle

19
Q

Dermatome

T2

A

Apex of the axilla

20
Q

Dermatome

T3

A

Midway between the apex of the axilla and the nipple line

21
Q

Dermatome

T4

A

Nipple line

22
Q

Dermatome

T5

A

Midway between T4 and T6

23
Q

Dermatome

T6

A

Xiphoid process

24
Q

Dermatome

T7

A

Midway between T6 and T8

25
Q

Dermatome

T8

A

Midway between T6 and T10

26
Q

Dermatome

T9

A

Midway between T8 and T10

27
Q

Dermatome

T10

A

Umbilicus

28
Q

Dermatome

T11

A

Midway between T10 and T12

29
Q

Dermatome

T12

A

Inguinal ligament

30
Q

Dermatome

L1`

A

Midway between T12 and L2

31
Q

Dermatome

L2

A

Antero-medial thigh

32
Q

Dermatome

L3

A

Medial femoral condyle

33
Q

Dermatome

L4

A

Medial malleolus

34
Q

Dermatome

L5

A

Dorsum of the foot

35
Q

Dermatome

S1

A

Lateral malleolus

36
Q

Dermatome

S2

A

Medial femoral condyle, popliteal fossa, back of the thigh

37
Q

Dermatome

S3

A

Ischial tuberosity

38
Q

Dermatome

S4-S5

A

Peri-anal area