Myotomes

Question 1

C1

Answer 1

None

Question 2

C2

Answer 2

Primary: SCM
Secondary: Longus Colli

Question 3

C3

Answer 3

Primary: Trapezius
Secondary: Splenius Capitis

Question 4

C4

Answer 4

Levator Scapluae

Diaphragm

Question 5

C5

Answer 5

Primary: Supraspinatus
Secondary: Infraspinatus, Deltoid middle fibers

Question 6

C6

Answer 6

Primary: Biceps Brachii
Secondary: Supinator, wrist extensors

Question 7

C7

Answer 7

Primary: Triceps
Secondary: Wrist Flexors

Question 8

C8

Answer 8

Primary: Extensor Pollicis Longus & Brevis
Secondary: Abductor Pollicis Longus

Question 9

T1

Answer 9

Hand Intrinsics (Finger Abduction)

Question 10

L3

Answer 10

Quadriceps

Question 11

L4

Answer 11

Primary: Tibialis Anterior
Secondary: Extensor Hallucis (L4, L5)

Question 12

L2

Answer 12

Primary: Iliopsoas
Secondary: Hip Adductors

Question 13

L5

Answer 13

Primary: Extensor Hallucis
Secondary: Peroneals, Gluteus Medius

Question 14

S1

Answer 14

Gastrocnemius

Question 15

S2

Answer 15

Hamstring

Question 16

What is a Myotome

Answer 16

Segmental innervation of muscle supplied by a single nerve.
There is overlap in muscle supply, therefore, KEY muscles are tested for weakness.
NOT TESTED FOR PAIN
Tested according to principles of manual muscle testing

Question 17

Grade 0

Answer 17

No contraction palpable

Question 18

Grade 1

Answer 18

Trace value

Evidence of a slight contractibility but no joint movement

Question 19

Grade 2-

Answer 19

Poor - value

Initiates motion if gravity is eliminated

Question 20

Grade 2

Answer 20

Poor Value - 25%

Complete range of motion with gravity eliminated

Question 21

Grade 2+

Answer 21

Poor + value

Initiates motion against gravity

Question 22

Grade 3-

Answer 22

Fair - value

Some but not complete range of motion against gravity

Question 23

Grade 3

Answer 23

Fair Value - 50%

Complete range of motion against gravity

Question 24

Grade 3+

Answer 24

Fair + value

Complete range of motion against gravity with minimal resistance

Question 25

Grade 4

Answer 25

Good value - 75%

Complete range of motion against gravity with some (moderate) resistance

Question 26

Grade 5

Answer 26

Normal value - 100%

Complete range of motion against gravity with maximal resistance

Question 27

Are Myotomes testing a Nerve Root or a Peripheral Nerve? What is it called?

Answer 27

Myotomes are testing the Nerve Root, therefore it is called RADICULOPATHY