ORIGIN

Tibialis Anterior

• 1/2 - 2/3 surface Tibial Shaft
• Interosseus Membrane
• Deep Surface of Fascia Cruris
• LAT condyle of Tibia

ORIGIN

EDL

• Lateral Condyle Tibia
• Upper 2/3 Medial Surface Fibular Shaft
• Deep Surface Fascia Cruris
• Anterior Intermuscular Septum
• Interosseous Membrane

ORIGIN

EHL

• Middle 2/4 FIBULAR shaft
• Interosseus Membrane

ORIGIN

Fibularis Tertius

Lower 1/3 of MEDIAL surface of FIBULAR shaft

Anterior Intermuscular Septum

ORIGIN

Fibularis Longus

• Lat surface of Head of Fibula
• Upper part of LATERAL surface of FIBULAR shaft

ORIGIN

Fibularis Brevis

• Lower part of LATERAL surface of Fibular Shaft

ORIGIN

Gastrocnemius

• LAT head --> 
• LAT surface of LAT condyle of femur 
• INF part of LAT supracondylar line of femur 
• adjacent part of knee joint capsule

• MED head --> 
• popliteal surface of femur; above MED condyle of Femur
•  INF part of MED supracondylar line of femur 
• adjacent part of knee joint capsule

ORIGIN

Soleus

• Soleal line and middle ⅓ of MED border of tibia

• Fibular head/ Upper ¼ to ⅓ of POSTEROLATERAL surface of Fibular Shaft

ORIGIN

Plantaris

• INF part of LAT supracondylar line of femur
• Immediately proximal to origin of LAT head of gastrocnemius
• Oblique Popiteal Ligament

ORIGIN

Tibialis Posterior

• POST surface of Tibial shaft INF to Soleal line
• LATERAL to Vertical line

ORIGIN

FDL

• POST surface of Tibial shaft INF to Soleal line
• MEDIAL to Vertical line

ORIGIN

FHL

• Lower ⅔ of POSTEROLATERAL surface of Fibular Shaft 
• Interosseus Membrane 

ORIGIN

Popliteus

• ANT part of popliteal groove on LAT surface of LATeral condyle of femur
• Arcuate Popiteal Ligament
• Lateral Meniscus

ORIGIN

Biceps Femoris 

• Long Head: 
• SuperoMEDIAL quadrant of Ischial Tuberosity
• Lower part of Sacrotuberous Ligament

• Short Head:
• Lateral Lip of Linea Aspera 
• Lateral Supracondyler Line
• Lateral intermuscular septum

ORIGIN

Semimembranous

ORIGIN

Semitendinous