Nevere Innervations, Segments, Actions

Piriformis

nerve to piriformis; S1, S2; external hip rotation

Gemellus Superior

nerve to gemellus superior; L5, S1, S2; external hip rotation

Obturator Internus

nerve to obturator internus; L5, S1, S2; external hip rotation

Gemellus Inferior

nerve to gemellus inferior; L4, L5, S1; external hip rotation

Obturator Externus

obturator nerve; L3, L4; external hip rotation

Quadratus Femoris

nerve to quadratus femoris; L4, L5, S1; external hip rotation

Biceps Femoris Long Head

tibia nerve; L5, S1, S2; hip extension, external hip rotation

Semitendinosus

tibial nerve; L5, S1, S2; hip extension, knee flexion

Semimembranosus

tibial nerve; L5, S1, S2; hip extension, knee flexion

Gluteus Maximus

inferior gluteal nerve; L5, S1, S2; hip extension, external hip rotation

Gluteus Minimus

superior gluteal nerve; L4, L5, S1; hip internal rotation, abduction, weak flexion

Tensor Fascia Lata

superior gluteal nerve; L4, L5, S1; hip flexion, abduction, internal rotation

Gluteus Medius

superior gluteal nerve; L4, L5, S1; hip abduction

Iliacus

femoral nerve; L2, L3; hip flexion, external rotation

Psoas Major

nerve to psoas major; L2, L3; hip flexion, flex lumbar spine

Sartorius

femoral nerve; L2, L3; hip flexion, external rotation, abduction, knee extension

Rectus Femoris

femoral nerve; L2, L3, L4; hip flexion, knee extension

Adductor Magnus

obturator nerve, tibial nerve; L3, L4; hip adduction

Adductor Longus

obturator nerve; L2, L3, L4; hip adduction

Adductor Brevis

obturator nerve; L2, L3, L4; hip adduction

Gracilis

obturator nerve; L2, L3, L4; hip adduction, knee flexion

Vastus Lateralis

femoral nerve; L2, L3, L4; knee extension

Vastus Lateralis

femoral nerve; L2, L3, L4; knee extension

Vastus Medialis

femoral nerve; L2, L3, L4; knee extension

Vastus Intermedius

femoral nerve; L2, L3, L4; knee extension

Articularis Genu

femoral nerve; L3, L4; draws capsule anteriorly

Biceps Femoris Short Head

common peroneal nerve; L5, S1, S2; knee flexion

Popliteus

tibial nerve; L4, L5, S1; knee derotation, posterior knee stabilization

Tibialis Anterior

deep peroneal nerve; L4, L5; ankle dorsiflexion

Extensor Digitorum Longus

deep peroneal nerve; L4, L5, S1; extension of MTPs 2-5

Extensor Hallucis Longus

deep peroneal nerve; L4, L5, S1; extension of great toe

Peroneus Tertius

deep peroneal nerve; L4, L5, S1; ankle dorsiflexion with eversion

Peroneus Longus

superficial peroneal nerve; L5, S1; ankle eversion

Peroneus Brevis

superficial peroneal nerve; L5, S1; ankle eversion

Tibialis Posterior

tibial nerve; L4, L5, S1; able inversion

Flexor Hallucis Longus

tibial nerve; S1, S2, S3; flexion of great toe

Flexor Digitorum Longus

tibial nerve; S1, S2, S3; flexion of toes 2-5

Soleus

tibial nerve; S1, S2; ankle plantar flexion

Gastrocnemius

tibial nerve; S1, S2; ankle plantar flexion, knee flexion

Extensor Digitorum Brevis

deep peroneal nerve; L5, S1; extension of MTPs

Flexor Digitorum Brevis

medial plantar nerve; S1, S2, S3; flexion of PIP, MTP 2-5

Abductor Hallucis

medial plantar nerve; S1, S2, S3; abduct great toe

Abductor Digiti Minimi

lateral plantar nerve, S1, S2, S3; abduct little toe

Quadratus Plantae

lateral plantar nerve; S1, S2, S3; assists flexor digitorum longus

Foot Lumbricales

1st: medial plantar nerve

2-4: lateral plantar nerve

S1, S2, S3; flex MTPs, extend IPs of toes 2-5

Adductor Hallucis

lateral plantar nerve; S1, S2, S3; adduct great toe

Flexor Digit Minimi

lateral plantar nerve; S1, S2, S3; Flex MTP 5th toe

Flexor Hallucis Brevis

medial plantar nerve; S1, S2, S3; flex MTP 1st toe

Plantar Interosseous

lateral plantar nerve; S1, S2, S3; adduct toes 3-5, flex MTPs, extend IPs

Dorsal Interosseous

lateral plantar nerve; S1, S2, S3; abduct 2-4, flex MTPs, extend IPs

Rhomboid Major and Minor

dorsal scapular nerve; C4, C5; scapular retraction, elevation, inward rotation

Upper Trapezius

CN XI, C3-4; scapular elevation, outward rotation, retraction, extend head and neck bilaterally, side bend ipsilaterally, rotate contralaterally

Middle Trapezius

CN XI, C3-4; scapular retraction, outward rotation

Lower Trapezius

CN XI, C3-4; scapular depression, outward rotation, retraction

Subclavius

nerve to subclavius; C5, C6; depress shoulder girdle, accessory of respiration

Levator Scapulae

dorsal scapular nerve; C3, C4, C5; scapular elevation, retraction, inward rotation, ipsilaterally side bending, ipsilateral rotatotion

Serratus Anterior

long thoracic nerve; C5, C6, C7; outward rotation, protraction of scapula

Pectoralis Minor

medial pectoral nerve; C8, T1; depression, inward rotation, protraction of scapula

Supraspinatus

suprascapular nerve; C5, C6; shoulder abduction, rotator cuff function

Infraspinatus

suprascapular nerve; C5, C6; shoulder external rotation, rotator cuff function

Teres Minor

axillary nerve; C5, C6; shoulder external rotation, rotator cuff function

Subscapularis

upper/lower subscapular nerve; C5, C6, C7; internal rotation of shoulder, rotator cuff function

Anterior Deltoid

axillary nerve; C5, C6; shoulder flexion, horizontal adduction

Middle Deltoid

axillary nerve; C5, C6; shoulder abduction

Posterior Deltoid

axillary nerve; C5, C6; shoulder extension, abduction, horizontal abduction

Teres Major

lower subscapular nerve; C5, C6; shoulder internal rotation, extension

Coracobrachialis

musculocutaneous nerve; C5, C6, C7; shoulder flexion, adduction

Latissimus Dorsi

thoracodorsal nerve; C6, C7, C8; extension, internal rotation of shoulder, depression of shoulder girdle

Pectoralis Major Sternal End

medial pectoral nerve; C7, C8, T1; shoulder adduction, internal rotation

Pectoralis Major Clavicular End

lateral pectoral nerve; C5, C6; shoulder adduction, internal rotation, horizontal adduction

Biceps Brachii

musculocutaneous nerve; C5, C6, C7; glenohumeral flexion, elbow flexion, forearm supination

Brachialis Brachii

musculocutaneous nerve; C5, C6; elbow flexion

Triceps Brachii

radial nerve; C6, C7, C8; elbow extension, shoulder extension, shoulder adduction

Supinator

radial nerve (deep branch, dorsal interosseous nerve); C5, C6; forearm supination

Extensor Indicis

radial nerve (deep branch); C7, C8; extend MCP of index finger

Extensor Pollicis Longus

radial nerve (deep branch); C7, C8; extend thumb IP joint

Extensor Pollicis Brevis

radial nerve (deep branch); C7, C8; extend thumb MCP

Abductor Pollicis Longus

radial nerve (deep branch); C7, C8; extend and abduct thumb at CMC joint

Extensor Carpi Radialis Longus

radial nerve; C6, C7; wrist extension

Extensor Carpi Radialis Brevis

radial nerve (deep branch); C7, C8; wrist extension

Extensor Digitorum Communis

radial nerve (deep branch); C7, C8; extend MCPs 2-5

Extensor Carpi Ulnaris

radial nerve (deep branch); C7, C8; wrist extension

Brachioradialis

radial nerve; C5, C6, C7; elbow flexion, accessory pronation and supination

Extensor Digiti Minimi

radial nerve (deep branch) C7, C8; extension of MCP of 5th digit

Anconeus

radial nerve; C7, C8, T1; extend elbow, traction of joint capsule

Flavor Pollicis Longus

median nerve (anterior interosseous branch); C8, T1; flex thumb IP

Flexor Digitorum Profundus

Digits 2-3: median nerve (anterior interosseous branch)

Digits 4-5: ulnar nerve

C8, T1; flex DIP digits 2-5

Pronator Quadratus

median nerve (anterior interosseous branch); C8, T1; forearm pronation

Flexor Digitorum Superficialis

median nerve; C7, C8, T1; flex PIP of digits 2-5

Flexor Carpi Radialis

median nerve; C6, C7; wrist flexion

Flavor Carpi Ulnaris

ulnar nerve; C7, C8; wrist flexion

Palmaris Longus

median nerve; C7, C8; wrist flexion, draws palms fascia centrally

Pronator Teres

median nerve; C6, C7; forearm pronation, elbow flexion

Flexor Pollicis Brevis

lateral head: median nerve

medial head: ulnar nerve

C8, T1; flex MCP of thumb

Abductor Pollicis Brevis

median nerve; C8, T1; abduct thumb at CMC

Adductor Pollicis

ulnar nerve; C8, T1; adduct thumb at CMC

Opponens Pollicis

median nerve; C8, T1; opposition at CMC

Abductor Digiti Minimi

ulnar nerve ( C8, T1; abduct 5th digit at MCP

Flexor Digiti Minimi

ulnar nerve; C8, T1; flex 5th finger at MCP

Opponens Digiti Minimi

ulnar nerve; C8, T1; oppose 5th finger at CMC