Thigh Muscles

1
Thigh Muscles
2
Anterior Thigh Muscles
3
Rectus Femoris

• O
• AIIS
• Groove above acetabular rim
• I
• Tibial tuberosity
• N
• Femoral
• F
• Knee EXT Hip FLX

Any place over anterior thigh
4
Vastus Lateralis

• O
• Proximal intertrochanteric line
• Anterior/inferior border of greater trochanter
• Proximal ½ lateral lip of linea apsera
• Lateral lip of gluteal tuberosity
• I
• Tibial tuberosity
• N
• Femoral
• F--
• Knee EXT

Anterolateral aspect of thigh
5
Vastus Medialis

• O
• Intertrochanteric line
• Medial lip of linea aspera
• adductor magnus and longus tendons
• I
• Tibial tuberosity
• N
• Femoral
• F
• Knee EXT

Anteromedial side of thigh near knee joint
6
Vastus Intermedius

• O
• Upper 2/3 femoral shaft
• Distal ½ of linea aspera
• I
• Tibial tuberosity
• N
• Femoral
• F
• Knee EXT

Cannot be palpated as lies deep to rectus femoris
7
Posterior Thigh
8
Popliteus

• O
• Poster0lateral femoral condyle
• Lateral meniscus
• Arcuate ligament
• I
• Posterior surface of proximal 1/3 of tibia
• N
• Tibial
• F
• NWB IR of tibia knee FLX
• WB ER of femur knee FLX

9
Semitendinosus

• O
• Ishial Tuberosity
• I
• Proximal medial surface of tibia
• N
• Sciatic (tibial)
• F
• Knee flexion
• IR of tibia
• Assists with hip EXT

Near the knee on posteromedial side
10
Semimembranosus

• O
• Ishial tuberosity
• I
• Posteromedial apsect of medial tibial condyle
• Medial meniscus
• N
• Sciatic (tibial branch)
• F
• Knee FLX
• IR of tibia at knee
• Assists with hip EXT

Largely covered by other muscles, can palpate
tendon on posteromedial aspect of tibia
11
Biceps Femoris

• O
• Long Head
• Ishial tuberosity
• Distal part of sacrotuberous lig
• Short Head
• Lower half of linea asperas lateral lip
• I
• Lateral aspect of fibular head
• Lateral tibial condyle
• N
• Long Head Sciatic (tibial)
• Short Head Sciatic (Peroneal)
• F
• Knee FLX ER, Hip EXT

Posterolateral side of distal knee