Lab 8 - Musculoskeletal System III

Question 1

Femur: What is the origin and insertion of the gastrocnemius?

Answer 1

Origin: medial and lateral condyles of the femur
Insertion: Calcaneus

Question 2

What muscle is the prime mover of hip flexion? Where is this muscle?

Answer 2

Iliopsas (anterior thigh)

Question 3

What muscle is the synergist to the iliopsas?

Answer 3

Rectus femoris

Question 4

What muscle is responsible for flexion, abduction, and lateral rotation of the hip?

Answer 4

Sartorius

Question 5

What muscle is the prime mover of hip abduction?

Answer 5

Gluteus medius

Question 6

What muscle is the synergist to the gluteus medius?

Answer 6

Tensor fasciae latae

Question 7

What is the prime mover of hip extension?

Answer 7

Gluteus maximus

Question 8

What muscles are responsible for hip extension?

Answer 8

1) Biceps femoris (lateral)
2) Semitendonosis (superficial)
3) Semimembranosus (deep)
Hamstrings

Question 9

What are the muscles that extend the hip and flex the knee called?

Answer 9

Hamstrings

Question 10

What do the hamstrings do?

Answer 10

Extend the hip and flex the knee

Question 11

What muscles are located on the medial (inner) thigh?

Answer 11

1) Gracilis (middle)
2) Abductor longus
3) Abductor magnus

Question 12

What muscles are responsible for abduction of the hip?

Answer 12

1) Gracilis (middle)
2) Abductor longus
3) Abductor magnus

Question 13

What muscles extend the knee?

Answer 13

1) Rectus femoris (front of thigh)
2) Vastus lateralis (lateral)
3) Vastus medialis (medial)
4) Vastus intermedius (deep to rectus femoris)
Quads

Question 14

What do the quads do?

Answer 14

Extend the knee

Question 15

What muscles are responsible for flexion of the knee?

Answer 15

Sartorius (anterior thigh) and gastrocnemius (posterior leg)

Question 16

What muscles are responsible for flexion of the knee?

Answer 16

1) Biceps femoris
2) Semitendonosis
3) Semimembranous
Hamstrings

Question 17

What muscle is the prime mover of dorsiflexion (walking on your heels)?

Answer 17

Tibialis anterior

Question 18

What muscles are responsible for plantar flexion (walking on your tiptoes)? Where are they located?

Answer 18

1) Gastrocnemius (for power)
2) Soleus (broad and flat muscle)
Both are on the posterior leg

Question 19

What muscle is the prime mover of inversion of the foot (standing on the outside of your foot)?

Answer 19

Tibialis posterior (deep and behind tibia)

Question 20

What muscle is responsible for eversion of the foot (standing on the inside of the foot)?

Answer 20

Fibularis longus

Question 21

True or false: the quadriceps (quads) do forward movements

Answer 21

True (hip flexion and knee extension)

Question 22

True or false: The fibula is lateral to the tibia

Answer 22

True

Question 23

What makes eversion of the foot a small movement?

Answer 23

The lateral maleolus