Muscles Of Lower Limbs Written Quiz
A quiz on the actions, insertions, and origins of the major muscles of the lower appendicular skeleton. It kind of sucks, but see for yourself. The questions would have worked better as fill in the blank, but I was too lazy to enter all the possible answers that might be partially or fully right. Make sure to check the explanations as there are all the cool details in there.
- 1.
The main function of the iliopsoas (illiacus & Psoas major) is:
- A.
Flexes thigh
- B.
Rotates Thigh
- C.
Abducts Thigh
- D.
Adducts Thigh
- E.
None of the above
Correct Answer
A. Flexes thighExplanation
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.Rate this question:
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- 2.
The origin and action of the Sartorius muscle are:
- A.
Anterior Superior Iliac Spine, medial rotation of thigh
- B.
Anterior Inferior iliac spine, flex and laterally rotate thigh
- C.
Anterior Superior Illiac Spine, flex and laterally rotate thigh
- D.
Anterior Inferior iliac spine, flex and abduct thight
- E.
None of the above
Correct Answer
C. Anterior Superior Illiac Spine, flex and laterally rotate thighExplanation
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.Rate this question:
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- 3.
Origin and insertion of Rectus Femoris is:
- A.
Anterior Superior Iliac Spine, Tibial Tuberosity
- B.
Anterior Inferior Iliac Spine, Tibial Tuberosity
- C.
Greater trochanter of femur, Tibial Tuberosity
- D.
Anterior Inferior Iliac Spine, medial malleolus
- E.
None of the above
Correct Answer
B. Anterior Inferior Iliac Spine, Tibial TuberosityExplanation
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.Rate this question:
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- 4.
The main action of the quadriceps femoris group (rectus femoris, vastus medialis, vastus lateralis, and vastus intermedius) is:
- A.
Flexes thigh, extends leg
- B.
Flexes thigh, flexes leg
- C.
Extends thigh, extends leg
- D.
Extends thing, flexes leg
- E.
None of the above
Correct Answer
A. Flexes thigh, extends legExplanation
Also important for stabilization of knee (vastus medialis and lateralis)Rate this question:
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- 5.
The main actions of the medial adductors are:
- A.
Abduction and lateral rotatation of thigh
- B.
Adduction and lateral rotation of thigh
- C.
Abduction and medial rotation of thigh
- D.
Adduction and medial rotation of thigh
- E.
None of the above
Correct Answer
D. Adduction and medial rotation of thighExplanation
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).Rate this question:
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- 6.
What is the major action(s) of the gluteus maximus?
- A.
Extension of thigh
- B.
Lateral rotation of thigh
- C.
Abducts thigh
- D.
All of the above
- E.
None of the above
Correct Answer
D. All of the aboveExplanation
Strangely enough, the butt muscle is generally inactive during normal standing and walking.Rate this question:
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- 7.
What is the major action of the hamstring group (biceps femoris, semitendinosus, semimembranosus)?
- A.
Flexes thigh
- B.
Extends leg
- C.
Adducts leg
- D.
Abducts leg
- E.
None of the above
Correct Answer
E. None of the aboveExplanation
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.Rate this question:
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- 8.
What are the actions of the tibialis anterior muscle?
- A.
Dorsiflexion, eversion
- B.
Dorsiflexion, inversion
- C.
Plantar flexion, eversion
- D.
Plantar flexion, inversion
- E.
None of the above
Correct Answer
B. Dorsiflexion, inversionExplanation
Also assists in supporting the medial longitudinal arch of footRate this question:
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- 9.
What is the main action of the gastrocnemius muscle?
- A.
Dorsiflexion
- B.
Eversion
- C.
Plantar flexion
- D.
Inversion
- E.
Mooing
Correct Answer
C. Plantar flexionExplanation
Also known as the main "calf" muscle, although it doesn't moo. It can flex knee when foot is dorsiflexed however.Rate this question:
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- 10.
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)
- A.
1st distal phalynx
- B.
2nd distal phalynx
- C.
3rd distal phalynx
- D.
4th distal phalynx
- E.
5th distal phalynx
Correct Answer(s)
B. 2nd distal phalynx
C. 3rd distal phalynx
D. 4th distal phalynx
E. 5th distal phalynxExplanation
This muscle is known for helping you keep your grip on the ground.Rate this question:
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Current Version
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Mar 17, 2023Quiz Edited by
ProProfs Editorial Team -
Oct 21, 2009Quiz Created by
Jsuma
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