Musculoskeletal Anatomy: Gluteal region and Thigh

Question 1

What is the origin, insertion and action of gluteus Maximus?

Answer 1

O: Sacroiliac and sacrotuberous ligaments | I: Gluteal tuberosity | A: Extention and lateral hip rotation.

Question 2

What is the origin, insertion and action of tensor fascia lata?

Answer 2

O: ASIS | I: Lateral condyle of the tibia | A: Abduction, medial rotation, and hip stabilization while standing.

Question 3

What is the origin, insertion and action of gluteus medius?

Answer 3

O: Posterior surface of the Ilium | I: superior aspect of the greater trochanter | A: Abduction of the hip.

Question 4

What is the origin, insertion and action of gluteus minimus?

Answer 4

O: Posterior surface of the Ilium under gluteus medius | I: Anterior aspect of the greater trochanter | A: Medial rotation, abduction and accessory flexion of the thigh at the hip.

Question 5

Name the muscle pointed by the arrows and what is their general function?

Answer 5

Lateral rotators

Question 6

What is the origin, insertion and action of Illiopsoas?

Answer 6

O: T12-L4/L5 (Psoas major/minor) and iliac fossa (iliacus) | I: Lesser trochanter of the femur | A: Flexion of the hip and lateral rotation.

Question 7

What is the origin, insertion and action of sartorius?

Answer 7

O: ASIS | I: Pes anserinus | A: Flexion of the hip and knee, lateral rotation, and abduction of the thigh at the hip.

Question 8

What is the origin, insertion and action of quadriceps femoris?

Answer 8

O: AIIS (rectus femoris) and the femur (for the vastuses) | I: Tibial tuberosity via the quadriceps tendon | A: flexion of the hip (rectus femoris) and extension of the knee.

Question 9

What is the origin, insertion and action of gracilis?

Answer 9

O: Pubis | I: Pes anserinus | A: flexion of the hip and knee and medial rotation when sitting

Question 10

What is the origin, insertion and action of pectineus?

Answer 10

O: Pubis | I: Pectinate line of the femur | A: adduction

Question 11

What is the origin, insertion and action of adductor longus?

Answer 11

O: Pubis | I: Linea aspera | A: adduction

Question 12

What is the origin, insertion and action of adductor brevis?

Answer 12

O: Pubis (posterior to pectineus)| I: Linea aspera (above adductor longus) | A: Adduction of the hip.

Question 13

What is the origin, insertion, and action of adductor magnus?

Answer 13

O: Pubis and ischial tuberosity | I: Linea aspera (adductor part) and adductor tubercle (hamstring part) | A: Adductor part (adduction, flexion of the hip, assist with medial rotation) and the Hamstring part (extension of the hip)

Question 14

What is the origin, insertion, and action of Biceps femoris?

Answer 14

O: Ischial tuberosity (long head) and linea aspera (short head) | I: Head of Fibula | A: Extension of the hip (long head) and knee flexion (long and short heads).

Question 15

What is the origin, insertion, and action of Semi-tendonosus?

Answer 15

O: Ischial tuberosity | I: Pes anserinus | A: Extension of the hip and flexion of the knee.

Question 16

What is the origin, insertion, and action of Semi-membranosus?

Answer 16

O: Ischial tuberosity | I: Posteromedial tibia | A: Extension of the thigh at the hip and flexion of the knee