Week 4 - Actions Of Hip Crossing Muscles, Based On Their LOP

Question 1

What are the actions of the gluteus Maximus

Answer 1

Hip joint: Thigh extension, thigh external rotation, thigh abduction (superior part), thigh adduction (inferior part)

Question 2

What are the actions of the gluteus medius

Answer 2

Hip joint: Thigh abduction, thigh internal rotation (anterior part); Pelvis stabilization

Question 3

What are the actions of the gluteus minimus ?

Answer 3

Hip joint: Thigh abduction, thigh internal rotation (anterior part); Pelvis stabilization

Question 4

What are the actions of the Psoas major?

Answer 4

Hip joint: Flexion of the thigh/trunk, lateral rotation of the thigh and Lateral flexion of the trunk

Question 5

What are the actions of the Iliacus ?

Answer 5

Hip joint: Thigh/trunk flexion and medial rotation

Question 6

What are the actions of the Psoas minor?

Answer 6

Weak flexion/lateral flexion of trunk

Question 7

What are the actions of rectus Femoris ?

Answer 7

Flexion and abduction

Question 8

What are the actions of the Obturator internus ?

Answer 8

• External rotation of extended thigh;
• Abduction of flexed thigh;
• Stabilization of hip joint

Question 9

What are the actions of the gemellus superior ?

Answer 9

Hip joint: Thigh external rotation, thigh abduction (from flexed hip); stabilizes head of femur in acetabulum

Question 10

What are the actions of the gemellus inferior?

Answer 10

Hip joint: Thigh external rotation, thigh abduction (from flexed hip), stabilizes head of femur in acetabulum

Question 11

What are the actions of the Piriformis?

Answer 11

Hip joint: Thigh external/lateral rotation, Thigh abduction (from flexed hip); Stabilizes head of femur in acetabulum

Question 12

What are the actions of the Obturator externus ?

Answer 12

Hip joint: Thigh external rotation, thigh abduction (from flexed hip); Stabilizes head of femur in acetabulum

Question 13

What are the actions of the Quadratus Femoris ?

Answer 13

Hip joint: thigh external rotation; stabilizes head of femur in acetabulum

Question 14

What are the actions of the Pectineus ?

Answer 14

Hip joint: Thigh flexion, thigh adduction, thigh external rotation, thigh internal rotation; pelvis stabilization

Question 15

What are the actions of the adductor Magnus?

Answer 15

Adductor part: Hip joint - Thigh flexion, thigh adduction, thigh external rotation
Hamstring part: Hip joint - Thigh extension, thigh internal rotation
Entire muscle: Pelvis stabilization

Question 16

What are the actions of the adductor brevis ?

Answer 16

Hip joint: thigh flexion, thigh adduction, thigh external rotation; pelvis stabilization

Question 17

What are the actions of the adductor longus ?

Answer 17

Hip joint: Thigh flexion, Thigh adduction, Thigh external rotation; Pelvis stabilization

Question 18

What are the actions of the gracilis ?

Answer 18

Hip joint: Thigh flexion, thigh adduction;
Knee joint: leg flexion, leg internal rotation

Question 19

What are the actions of the tensor fascia Lata?

Answer 19

Hip joint: Thigh internal rotation, (Weak abduction); Knee joint: Leg external rotation, (Weak leg flexion/ extension); Stabilizes hip & knee joints

Question 20

What are the actions of the sartorius ?

Answer 20

Hip joint: thigh flexion, thigh abduction, thigh external rotation
Knee joint: leg flexion, leg internal rotation

Question 21

What are the actions of the Semimembranosus?

Answer 21

Hip joint: thigh extension and internal rotation
Knee joint: flexion and internal rotation of the leg
Stabilizes pelvis

Question 22

What are the actions of the semitendinosus?

Answer 22

Hip joint: Thigh extension, thigh internal rotation, stabilizes pelvis.
Knee joint: Leg flexion, leg internal rotation.

Question 23

What are the actions of the Long Head Bicep Femoris?

Answer 23

Hip joint: thigh extension, thigh external rotation;
Knee joint: leg flexion, leg external rotation; stabilizes pelvis