Nerves and Nerve to Muscle Connection

controls contraction of deltoid which abducts the arm. controls contraction of teres minor which rotates humerus laterally.

axillary

Controls contraction of triceps brachii which extends the forearm. Controls contraction of 4 muscles: extensor digitorum, extensor carpi radialis longus, extensor carpi radialis brevis, extensor carpi ulnaris which extends the wrist.

radial

Controls contraction of 3 muscles: flexor digitorum superficialis, flexor carpi radialis, palmaris longus which flexes the wrist. Controls contraction of flexor digitorum superficialis which flexes the fingers. Controls contraction of pronator teres which pronates the forearm.

median

controls contraction of flexor carpi ulnaris which contracts the wrist

ulnar

Controls contraction of 4 muscles: vastus lateralis, vastus medialis, vastus intermedius, rectus femoris which extends the knee. Controls contraction of rectus femoris (of Quads) which flexes the hip. Controls contraction of sartorius which flexes, abducts, and laterally rotates hip.

femoral

controls contraction of gracilis, adductor longus, and adductor magnus which adducts the hip.

obturator

Controls contraction of 3 muscles (collectively called the "hamstrings"): biceps femoris, semitendinosus, semimembranosus which extends the hip and flexes the knee.

sciatic

Controls contraction of External urethral sphincter and external anal sphincter which controls the voluntary action of urination and defecation.

pudendal

diaphragm, assisting in inhalation

phrenic

deltoid, assists in arm abduction

axillary

triceps, elbow extension

radial

forearm flexors and pronators

median

flexor carpi ulnaris, wrist flexion

ulnar

quadriceps, knee extension

femoral

hip adductors

obturator

hamstrings, knee flexion

sciatic

external sphincters

pudendal