Leg Muscles

The leg musculature is divided into three regions:

Previous Region
Lateral Region
Later Region

Previous Region		Lateral Region
Tibial Anterior Long Finger Extender Long Hallux Extender Fibular Third		Long Fibular Fibular Short

Later Region

Surface layer

Medial Gastrocnemius
Lateral Gastrocnemius
Soleus
Planting Delgado

Deep layer

Popliteal
Long Finger Flexor
Hallux Long Flexor
Posterior Tibial

Previous Region

1. PREVIOUS TIBIAL

Proximal Insertion: Lateral tibial condyle and proximal ½ of tibial lateral face and interosseous membrane
Distal Insertion: Medial cuneiform and base of the 1st metatarsal
Innervation: Deep Fibular Nerve (L4 & #8211; S1)
Action: Dorsal Flexion and Inversion of the Foot

2. FINGER EXTENDER

Proximal Insertion: Lateral tibial condyle, proximal fibula and interosseous membrane
Distal Insertion: Middle and distal phalanx of the 2nd to 5th fingers
Innervation: Deep Fibular Nerve (L4 & #8211; S1)
Action: Extension of MF, IFP and IFD from 2nd to 5th fingers

3. HALUX LONG EXTENSOR

Proximal Insertion: 2/4 intermediate fibula and interosseous membrane
Distal Insertion: Distal Hallux Phalanx
Innervation: Deep Fibular Nerve (L4 & #8211; S1)
Action: Hallux Extension, Dorsal Flexion, and Foot Inversion

4. THIRD FIBER

Proximal Insertion: 1/3 distal to the anterior aspect of the fibula
Distal Insertion: Base of the 5th metatarsal
Innervation: Deep Fibular Nerve (L5 & #8211; S1)
Action: Foot Eversion

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Lateral Region

1. SHORT FIBER

Proximal Insertion: 2/3 distal to the lateral aspect of the fibula

Distal Insertion: Base of the 5th metatarsal
Innervation: Superficial Fibular Nerve (L4 & #8211; S1)
Action: Plantar Flexion and Foot Eversion

2. LONG FIBER

Proximal Insertion: Head, 2/3 proximal to the lateral surface of the fibula and lateral tibial condyle
Distal Insertion: 1st metatarsal and medial cuneiform
Innervation: Superficial Fibular Nerve (L4 & #8211; S1)
Action: Plantar Flexion and Foot Eversion

Later Region – Surface layer

1. MEDIAL GASTROCNEMIUM

Proximal Insertion: Medial condyle of the femur
Distal Insertion: Calcaneal
Innervation: Tibial Nerve (S1 & #8211; S2)
Action: Knee Flexion and Plantar Ankle Flexion

2. SIDE GASTROCNEMIUM

Proximal Insertion: Femoral lateral condyle
Distal Insertion: Calcaneal
Innervation: Tibial Nerve (S1 & #8211; S2)
Action: Knee Flexion and Plantar Ankle Flexion

3. SOLID

Proximal Insertion: 1/3 middle of tibial medial face and fibular head
Distal Insertion: Calcaneal (gastrocnemius tendon)
Innervation: Tibial Nerve (L5 & #8211; S1)
Action: Plantar Ankle Flexion

4. SLANT PLANTING

Proximal Insertion: Femoral lateral condyle
Distal Insertion: Calcaneal
Innervation: Tibial Nerve (L4 & #8211; S1)
Action: Helps the Sural Triceps

Posterior Region & #8211; Deep layer

1. POPLITE

Proximal Insertion: Femoral lateral condyle
Distal Insertion: Sole line of the posterior tibial surface
Innervation: Tibial Nerve (L4 & #8211; S1)
Action: Knee Flexion and Medial Rotation

2. LONG FLEXOR OF FINGERS

Proximal Insertion: Posterior face of tibia
Distal Insertion: Distal Phalanges of 2nd to 5th Finger
Innervation: Tibial Nerve (L5 & #8211; S1)
Action: Plantar Flexion and Ankle Inversion, MF Flexion, IFP and IFD 2nd to 5th Fingers

3. HALUX LONG FLEXOR

Proximal Insertion: 2/3 distal to the posterior surface of the fibula and interosseous membrane
Distal Insertion: Distal Hallux Phalanx
Innervation: Tibial Nerve (L5 & #8211; S2)
Action: Hallux Flexion, Plantar Flexion and Ankle Inversion

4. AFTER TIBIAL

Proximal Insertion: Posterior face of tibia and proximal 2/3 of fibula and interosseous membrane
Distal Insertion: 3 cuneiform (medial, middle and lateral), cuboid, navicular and base of the 2nd to 4th metatarsals
Innervation: Tibial Nerve (L5 and S1)
Action: Plantar Flexion and Inversion of the Foot

Leg Muscles
Previous View & #8211; Superficial Dissection