Muscles that MOVE the lower leg, hip, and thigh

Question 1

Hamstrings:

Biceps Femoris (Long Head)

Answer 1

ORIGIN

Ischial tuberosity.

INSERTION

The head of the fibula.

ACTION

Both heads flex and laterally rotate knee, long head extends hip.

INNERVATION

Common peroneal and sciatic nerve.

Question 2

Hamstrings:

Biceps Femoris (Short Head)

Answer 2

ORIGIN

Linea aspera of femur.

INSERTION

The head of the fibula.

ACTION

Both heads flex and laterally rotate knee, long head extends and laterally rotates hip.

INNERVATION

Common peroneal and sciatic nerve.

Question 3

Hamstrings:

Semitendinosus

Answer 3

ORIGIN

Ischial tuberosity.

INSERTION

Proximal medial shaft of tibia at pes anserinus.

ACTION

Extension of hip/thigh, flexes and medially rotates knee.

INNERVATION

Sciatic.

Question 4

Hamstrings:

Semimembranosus

Answer 4

ORIGIN

Ischial tuberosity.

INSERTION

Proximal medial shaft of tibia.

ACTION

Extension of hip/thigh, flexes and medially rotates knee.

INNERVATION

Sciatic.

Question 5

Quadriceps:

Rectus Femoris

Answer 5

ORIGIN

Anterior inferior iliac spine (AIIS) and the ilium (just above the acetabulum).

INSERTION

Patella and tibial tuberosity via the patellar tendon. ACTION

All quadriceps extend the knee. Assists in flexing the hip.

INNERVATION

Femoral.

Question 6

Quadriceps:

Vastus Lateralis

Answer 6

ORIGIN

Gluteal tuberosity and linea aspera of femur.

INSERTION

Tibial tuberosity via the patellar ligament.

ACTION

All quadriceps extend the knee.

INNERVATION

Femoral.

Question 7

Quadriceps:

Vastus Intermedius

Answer 7

ORIGIN

Anterior and lateral shaft of femur.

INSERTION

Tibial tuberosity via the patellar ligament.

ACTION

All quadriceps extend the knee.

INNERVATION

Femoral.

Question 8

Quadriceps:

Vastus Medialis

Answer 8

ORIGIN

Medial lip of linea aspera on femur.

INSERTION

Tibial tuberosity via the patellar ligament.

ACTION

All quadriceps extend the knee.

INNERVATION

Femoral.

Question 9

Other:

Sartorius (Front View)

Answer 9

ORIGIN

(See Sartorius Side View Card) Anterior Superior Iliac Spine (ASIS)

INSERTION

Medial surface of the upper shaft of tibia (pes anserinus).

ACTION

Hip Action: Flexion, abduction and lateral rotation. Knee Action: Flexion and medial rotation of flexed knee.

INNERVATION

Femoral.

Question 10

Other:

Sartorius (Side View)

Answer 10

ORIGIN

Anterior Superior Iliac Spine (ASIS).

INSERTION

(See Sartorius Front View Card) Medial surface of the upper shaft of tibia (pes anserinus).

ACTION

Hip Action: Flexion, abduction, and lateral rotation. Knee Action: Flexion and medial rotation of flexed knee.

INNERVATION

Femoral.

Question 11

Other:

Popliteus

Answer 11

ORIGIN

Lateral condyle of femur.

INSERTION

Posterior shaft of tibia (above the soleal line) ACTION

Unlocks knee joint at beginning of flexion. INNERVATION

Tibial.