Muscles of the Leg and Foot

Question 1

Sartorius - name origin, insertion and actions

Answer 1

Origin: anterior super iliac spine
Insertion: proximal anteromedial tibia at the pes anserine tendon
Actions: flexion, lateral rotation and abduction of the hip, flexion and medial rotation of knee, anterior tilt of pelvis

Question 2

Sartorius - name origin, insertion and actions

Answer 2

Origin: anterior super iliac spine
Insertion: proximal anteromedial tibia at the pes anserine tendon
Actions: flexion, lateral rotation and abduction of the hip, flexion and medial rotation of knee, anterior tilt of pelvis

Question 3

Quadriceps femoris group - name origin, insertion and actions

Answer 3

Origins:
- rectus femoris: anterior inferior iliac spine
- vastus medialis: medial lip of linea aspera
- vastus lateralis: lateral lip of linea aspera, gluteal tuberosity, greater trochanter
- vastus intermedius: anterior and lateral shaft of the femur
Insertion: tibial tuberosity via patella and patella ligament
Actions: extension of the knee
- rectus femoris: flexion of hip

Question 4

Adductor group - name origin, insertion and actions

Answer 4

Origins:
- adductor magnus: inferior ramus of pubis, ramus of ischium, ischial tuberosity
- adductor longus: pubic tubercle
- adductor brevis:
- pectineus:
- gracilis:
Insertions:
- adductor magnus: medial lip of the linea aspera, adductor tubercle
- adductor longus: medial lip of linea aspera
Actions:
- all: adduction and medial rotation of hip
- all except gracilis: flexion of hip
- gracilis: flexion and medial rotation of knee
- posterior fibres of adductor magnus: extension of hip