Leg Muscle Actions

Question 1

Hip / Thigh Flexors

Answer 1

Sartorius
Iliacus
Tensor Fasciae Latae (Tensor of Fascia Lata)
Pectineus
Adductor Brevis
Adductor Magnus (Adductor Part)

Question 2

Hip / Thigh Extensors
(hamstrings)

Answer 2

Biceps Femors
Semitendinosus
Semimembranosus
Adductor Magnus (Hamstring Part)

Question 3

Hip / Thigh Abductors
(attach to lateral leg for the most part)

Answer 3

Sartorius
Gluteus Medius
Gluteus Minimus

Question 4

Hip / Thigh Adductors
(attach to medial leg for the most part)

Answer 4

Pectineus
Adductor Longus
Adductor Brevis
Adductor Magnus
Gracilis

Question 5

Hip / Thigh Lateral Rotatores
(attach to lateral leg for the most part)

Answer 5

Glute Max
Sartorius
Obturator Externus
Obturator Internus
Piriformis
Gemelli, Superior and Inferior
Quadratus Femoris

Question 6

Hip / Thigh Medial Rotatores
(attach to medial leg for the most part)

Answer 6

Pectineus
Gracilis
Semitendinosus
Semimembranosus
Gluteus Medius
Gluteus Minimus

Question 7

Knee Flexor

Answer 7

Sartorius
Biceps Femors
Semitendinosus
Semimembranosus
Gracilis

Lateral and Medial Gastronemius
Plantaris (weakly)

Question 8

Knee Extensors

Answer 8

Rectus femoris
Vastus Lateralis
Vastus Medialis
Vastus Intermedius

Question 9

Knee Medial rotator

Answer 9

Gracilis

Question 10

Which muscles of the lower limb span two joints and therefore have different actions?

Answer 10

Rectus Femoris:
Actions:
Flexes the hip joint.
Extends the knee joint

Hamstring Muscles (e.g., Biceps Femoris, Semitendinosus, Semimembranosus):
Flex the knee joint.
Extend the hip joint.

Sartorius:
Flexes, abducts, and laterally rotates hip joint; flexes knee joint

Question 11

When you get up from a chair, you extend at both the hip and knee. What muscles are responsible for these actions?
What roles do the rectus femoris and biceps femoris play?

Question 12

Give three examples of synergistic muscle groups within the lower extremity and identify the antagonist muscle group of each.

Question 13

postural muscle that help control deviation of the trunk and are active during standing.

Answer 13

Iliopsoas (Psoas Major + Iliacus)

Question 14

Which Upper Leg Muscles have 2 Innervations

Answer 14

Adductor Magnus
- Hamstring Part: Sciatic -> Tibial
- Adductor Part: Obturator
Bicep Femoris
- Long Head: Sciatic -> Tibial
- Short Head: Sciatic -> Fibular

Question 15

What Foot Muscles are Supplied by the Medial Plantar Nerve?

Answer 15

Abductor Hallicus
Flexor Digitorum Brevis
Flexor Hallicus Brevis

Question 16

Which Toe Extenders are part of the 4 layers of the foot and which layers are they in?

Answer 16

theres none ha