Muscles Pt 4

Question 1

What is the action of the Erector spinae?

Answer 1

Unilaterally: flex the vertebral column to the same side.
Bilaterally: extend the vertebral column

Question 2

What is the action of the multifidi and the rotatores? (Core stabilisers)

Answer 2

Unilaterally: rotate the vertebrae column to the opposite side.
Bilaterally: extend the vertebral column.

Question 3

What is the action of the Quadratus Lombrum?

Answer 3

If the pelvis is stable it laterally flexes the spine to the same side.
If the rib cage is stable it hikes the hip to the same side.

Question 4

What is the action of the Psoas?

Answer 4

Flex the hip, laterally rotate the hip, adduct the hip.

Question 5

What is the action of the Illiacus?

Answer 5

Flex the hip, laterally rotate the hip and adduct the hip

Question 6

What is the action of the adductor?

Answer 6

Adduct the legs back together

Question 7

What is the action of the Sartorius?

Answer 7

Flex the hip, laterally rotate the hip, abduct the hip, flex the knee, medially rotate the flexed knee.

Question 8

What is the action of the Gluteus Maximus?

Answer 8

Laterally rotate the hip, extend the hip, abduct the hip.

Question 9

What is the action of the Gluteus medius?

Answer 9

All fibres abduct the hip.
Anterior fibres: medially rotate the hip and flex the hip.

Question 10

What is the action of the Gluteus Minimus?

Answer 10

Medially rotate the hip, abduct the hip and flex the hip.