origin, etc for practical

Short head: coracoid process

Long head: edge of glenoid cavity

Origin of Biceps brachii

Radial tuberosity (of radius)

Insertion of Biceps brachii

Flexes and supinates forearm

Action of Biceps brachii

Musculocutaneous nerve

Innervation of biceps brachii

Anterior surface of distal humerus (flanks deltoid tuberosity)

Origin of brachialis

Coronoid process of ulna

Insertion of brachialis

Flexes forearm

Action of brachialis

Musculocutaneous nerve

Innervation of brachialis

Close to pubic symphysis

Origin of adductor longus

Linea aspera

Insertion of of adductor longus

Adducts, flexes and medially rotates thigh

Action of of adductor longus

Obturator nerve

Innervation of of adductor longus

Ischium, pubis, and ischial tuberosity

Origin of adductor magnus

Linea aspera and adductor tubercle (just superior to medial femoral epicondyle)

Insertion of adductor magnus

Adducts, flexes, and medially rotates thigh, extends thigh

Action of adductor magnus

Ischial tuberosity (long head), linea aspera (short head)

Origin of biceps femoris

Head of fibula, lateral tibial condyle

Insertion of biceps femoris

Extends thigh, flexes lower leg

Action of biceps femoris

Sciatic nerve

Innervation of biceps femoris

Medial and lateral femoral condyles

Origin of gastrocnemius

Calcaneus via achilles tendon

Insertion of gastrocnemius

Plantarflexes foot, flexes lower leg

Action of gastrocnemius

Tibial nerve

Innervation of gastrocnemius

Lateral tibial condyle, proximal tibial shaft

Origin of tibialis anterior

Medial cuneiform (medial tarsal in 1st row) and 1st metatarsal

Insertion of tibialis anterior

Dorsiflexes foot

Action of tibialis anterior

Deep fibular nerve

Innervation of tibialis anterior