Key myotomes
C5 deltoid
C6 wrist extensors (biceps, extensor carpi radialis longus and brevis)
C7 elbow extensors (triceps)
C8 finger flexors to the middle finger
T1 small finger abductors (abductor digiti minimi)
L2 hip flexors (iliopsoas)
L3,L4 knee extensors (quadriceps, patellar reflexes)
L4,L5 to S1 knee flexion (hamstrings)
L5 ankle and big toe dorsiflexors (tibialis anterior and extensor hallucis longus)
S1 ankle plantar flexors (gastrocnemius, soleus)
Spinal dermatomes
C2, C3, C4, C5, C6, C7, C8, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, L1, L2, L3, L4, L5, S1, S2, S3, S4, S5

 

 

Content on this page has not been checked for accuracy. The author's credentials have not been confirmed. Always use multiple peer-reviewed scholarly sources and good clinical judgement in your decision making.

The Compendium platform was created by David Kwinter, MD, CCFP(EM).

Dr. Kwinter is a Cayman Family Doctor. He runs a Family Medicine Clinic at Cayman Medical in George Town, Grand Cayman, Cayman Islands.