Myotomes and Dermatomes

Question 1

Myotome: C1

Answer 1

resisted making double chin

Question 2

Myotome: C2

Answer 2

resisted pushing chin out

Question 3

Myotome: C3

Answer 3

resist lateral Cx flexion

Question 4

Myotome: C4

Answer 4

resist shoulder shrug

Question 5

Myotome: C5

Answer 5

resist shoulder abduction @ 80 degrees - elbows flexed

Question 6

Myotome: C6

Answer 6

resist elbow flexion

Question 7

Myotome: C7

Answer 7

resist elbow extension

Question 8

Myotome: C8

Answer 8

resist thumbs up

Question 9

Myotome: T1

Answer 9

make tent with MCP - resist finger abduction

Question 10

Dermatome: C3

Answer 10

Area above clavicle - Anteriorly and posteriorly

Question 11

Dermatome: C4

Answer 11

Area below clavicle - anteriorly and posteriorly

- two finger lengths below acromion

Question 12

Dermatome: C5

Answer 12

lateral deltoid and anterior/posterior aspects of lateral upper arm - down to mid forearm
- over aspect of brachioradialis

Question 13

Dermatome: C6

Answer 13

middle aspect of anterior forearm - runs in strip from mid armpit down to thumb

Covers posterior thumb and posterior lateral radius to the elbow

Question 14

Dermatome: C7

Answer 14

middle three fingers and palm

posterior aspect of middle three fingers and middle part of posterior forearm to elbow

Question 15

Dermatome: C8

Answer 15

anterior and posterior little finger - extends to 2cm proximal to ulna head

Question 16

Dermatome: T1

Answer 16

anterior and posterior aspects of MEDIAL arm from above the wrist to mid upper arm - 2cm below armpit

Question 17

Dermatome: T2

Answer 17

Armpit - anterior and posterior