Spinal nerve root
C7
Muscle contributions
Reported motor contributions, grouped by region. Muscles commonly receive more than one root; these groups are not a serial nerve pathway.
Neck
- Longus colli
- Anterior scalene
- Middle scalene
- Posterior scalene
Shoulder and scapula
- Serratus anterior
- Subscapularis
- Teres major
- Latissimus dorsi
- Pectoralis major — sternocostal part
Arm and elbow
- Coracobrachialis
- Triceps brachii
- Anconeus
Forearm
- Brachioradialis
- Extensor carpi radialis longus
- Extensor carpi radialis brevis
- Extensor carpi ulnaris
- Extensor digitorum
- Extensor digiti minimi
- Extensor indicis
- Abductor pollicis longus
- Extensor pollicis brevis
- Extensor pollicis longus
- Flexor carpi radialis
- Flexor carpi ulnaris
- Flexor digitorum superficialis
- Palmaris longus
- Pronator teres
Source-dependent contributions
- Brachialis — a C7 radial-nerve contribution is described separately from its usual musculocutaneous C5–C6 supply.
- Flexor pollicis longus — C7 is included by some clinical references; UW lists C8–T1.
Other deep posterior neck muscles have segmental posterior-ramus supply; the reviewed references do not resolve every muscle or fascicle to an individual root.