Ankle

Front 1

Gastrocnemius

(Calf)

Back 1

Origin: 1)Femur-lateral supracondylar line (ridge)

2)Femur-medial supracondylar line (ridge)

Insertion: Calcaneous-posterior surface via the Achilles tendon

Action: Knee flexion, plantar flexion (ankle extension)

Front 2

Tibialis Anterior

Back 2

Origin:1)Tibia-lateral condyle
2)Tibial shaft-superior ½, anterolateral surface

Insertion: 1) base of 1st metatarsal –inferior medial surface
2)Medial cuneiform-inferior surface

Action: Foot inversion (ankle inversion) and dorsi flexion (ankle flexion or foot flexion)

Front 3

Peroneus Longus

(Fibularis Longus)

Back 3

Origin:1)Head of the fibula
2)Shaft of the fibula-sup 2/3 lateral surface

Insertion: 1)1st metatarsal (lateral Tuberosity)
2)Medial cuneiform, posterolateral surface

Action: Foot eversion (ankle eversion) and plantar flexion (ankle extension)

Front 4

Abductor Hallucis

(big toe)

Back 4

Origin: Calcaneous-tuberosity, medial process (plantar surface)

Insertion: Base of proximal phalange 1- medial surface

Action: Hallux toe abduction

Front 5

Flexor Digitorum Brevis

Back 5

Origin: Calcaneous-tuberosity, medial process

Insertion: Middle phalange 2, 3, 4, 5-planter surface- (tendon bifurcates)

Action: Toe flexion of digits 2-5

Front 6

Abductor Digiti Minimi

Back 6

Origin: Calcaneous-tuberosity,

Insertion: Lateral process Base of proximal phalange 5-lateral surface

Action: Little toe abduction