Muscles Of Lower Limbs Written Quiz

1. What is the main action of the gastrocnemius muscle?

Dorsiflexion

Eversion

Plantar flexion

Inversion

Mooing

Also known as the main "calf" muscle, although it doesn't moo. It can flex knee when foot is dorsiflexed however.

Explanation

Also known as the main "calf" muscle, although it doesn't moo. It can flex knee when foot is dorsiflexed however.

2. The main function of the iliopsoas (illiacus & Psoas major) is:

Flexes thigh

Rotates Thigh

Abducts Thigh

Adducts Thigh

None of the above

illiacus is the prime mover for flexing thigh or for flexing trunk on thigh in a bowing movement and the psoas major does the same but also effects lateral flexion of the verterbal column - making it a very important postural muscle.

Explanation

illiacus is the prime mover for flexing thigh or for flexing trunk on thigh in a bowing movement and the psoas major does the same but also effects lateral flexion of the verterbal column - making it a very important postural muscle.

3. The main action of the quadriceps femoris group (rectus femoris, vastus medialis, vastus lateralis, and vastus intermedius) is:

Flexes thigh, extends leg

Flexes thigh, flexes leg

Extends thigh, extends leg

Extends thing, flexes leg

None of the above

Also important for stabilization of knee (vastus medialis and lateralis)

Explanation

Also important for stabilization of knee (vastus medialis and lateralis)

4. The main actions of the medial adductors are:

Abduction and lateral rotatation of thigh

Adduction and lateral rotation of thigh

Abduction and medial rotation of thigh

Adduction and medial rotation of thigh

None of the above

Flexion is also an important action of this group of muscles and is essential for walking (as anyone with a pulled groin will attest to).

Explanation

Flexion is also an important action of this group of muscles and is essential for walking (as anyone with a pulled groin will attest to).

5. Origin and insertion of Rectus Femoris is:

Anterior Superior Iliac Spine, Tibial Tuberosity

Anterior Inferior Iliac Spine, Tibial Tuberosity

Greater trochanter of femur, Tibial Tuberosity

Anterior Inferior Iliac Spine, medial malleolus

None of the above

There is also a partial origin on the superior margin of acetabulum and technically the insertion is on the patella and tibial tuberosity via the patellar ligament.

Explanation

There is also a partial origin on the superior margin of acetabulum and technically the insertion is on the patella and tibial tuberosity via the patellar ligament.

6. What are the actions of the tibialis anterior muscle?

Dorsiflexion, eversion

Dorsiflexion, inversion

Plantar flexion, eversion

Plantar flexion, inversion

None of the above

Also assists in supporting the medial longitudinal arch of foot

Explanation

Also assists in supporting the medial longitudinal arch of foot

7. The origin and action of the Sartorius muscle are:

Anterior Superior Iliac Spine, medial rotation of thigh

Anterior Inferior iliac spine, flex and laterally rotate thigh

Anterior Superior Illiac Spine, flex and laterally rotate thigh

Anterior Inferior iliac spine, flex and abduct thight

None of the above

The Sartorius is special for being the longest continuous muscle in the body. Sartor means "tailor" and this muscle was either named because it helps to sit cross-legged as tailors are often depicted, or because this muscle would become highly developed from the tailor operating the foot pedals on the machine all day - depending on who you talk to.

Explanation

The Sartorius is special for being the longest continuous muscle in the body. Sartor means "tailor" and this muscle was either named because it helps to sit cross-legged as tailors are often depicted, or because this muscle would become highly developed from the tailor operating the foot pedals on the machine all day - depending on who you talk to.

8. Sorry this quiz was kind of lame, hopefully it will help me (or anybody else) remember this seemingly simple stuff that I keep forgetting.

The flexor digitorum longus has insertions on (choose all correct answers)

1st distal phalynx

2nd distal phalynx

3rd distal phalynx

4th distal phalynx

5th distal phalynx

This muscle is known for helping you keep your grip on the ground.

Explanation

This muscle is known for helping you keep your grip on the ground.

Submit

9. What is the major action(s) of the gluteus maximus?

Extension of thigh

Lateral rotation of thigh

Abducts thigh

All of the above

None of the above

Strangely enough, the butt muscle is generally inactive during normal standing and walking.

Explanation

Strangely enough, the butt muscle is generally inactive during normal standing and walking.

10. What is the major action of the hamstring group (biceps femoris, semitendinosus, semimembranosus)?

Flexes thigh

Extends leg

Adducts leg

Abducts leg

None of the above

Major actions of the hamstring group are extending the thigh and flexing the leg, semitendinosus and semimembranosus are active in medial rotation of the leg and biceps femoris helps to laterally rotate leg when the knee is flexed.

Explanation

Major actions of the hamstring group are extending the thigh and flexing the leg, semitendinosus and semimembranosus are active in medial rotation of the leg and biceps femoris helps to laterally rotate leg when the knee is flexed.