Skeletal Muscles Gross Anatomy II - Actions

Biceps Brachii

Flexes and supinates forearm

Triceps brachii

Powerful forearm extensor

Coracobrachialis

Flexes and adducts arm

Brachialis

Major forearm flexer

Pronator Teres

Pronates forearm

Flexor Carpi Radialis

Powerful flexor of hand

Palmaris Longus

Tenses skin and fascia of palm

Flexor Carpi Ulnaris

Powerful flexor & adductor of hand

Extensor Carpi Ulnaris

Extends

Extensor Digitorum

Prime mover of finger extension

Extensor Carpi Radialis Longus & Brevis

Extends and adducts hand

Brachioradialis

Syngergist in flexing forearm

Iliacus

Prime mover in flexing thigh

Psoas Major

Prime mover for flexing thigh and vertebral column

Sartorious

Flexes, abducts and laterally rotates thigh

Gluteus Maximus

Major extensor of thigh

Gluteus Minimus

Abducts and medially rotates thigh

Tensor Fascia Lata

Tightens IT tract

Piriformis

Rotates extended thigh laterally

Biceps Femoris, Semitendinosus, Semimembranosus

Hamstring Group (Extends thigh and flexes leg)

Quadriceps Femoris Group - Extends Leg

Rectus Femoris, Vastus Medialis, Vastus Intermedius, Vastus Lateralis

Adductor Group

Pectineus, Adductor Brevis, Adductor Longus, Gracilis, Adductor Magnus

Adductor Magnus and Longus

Medially rotates thigh

Pectineus, Gracilis, Adductor Brevis

Medially Rotates thigh

Tibialis Anterior

Prime mover of dorsiflexion

Fibularis Longus & Brevis

Plantar flexes and everts foot

Extensor Digitorum Longus

Prime mover of toe extension

Gastrocnemius and Soleus

Plantar flexes foot