Muscle Attachment And Innervation Quiz
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Pelvis and lower limb
Questions and Answers
- 1.
What is the action of the iliopsoas muscle?
- A.
Thigh flexion
- B.
Thigh adduction
- C.
Lateral rotation of the thigh
- D.
Abduction of flexed thigh
- E.
Stabilizing the femoral head in the acetabulum
Correct Answer
A. Thigh flexionExplanation
The action of the iliopsoas muscle is thigh flexion. This muscle is a combination of two muscles, the iliacus and the psoas major, which work together to flex the thigh at the hip joint. Thigh flexion refers to the movement of bringing the thigh towards the abdomen. The iliopsoas muscle is responsible for this movement, allowing us to lift our leg and bring our knee towards our chest.Rate this question:
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- 2.
What are the attachments of the adductor longus muscle (two answers)?
- A.
Inferior ramus of the pubis
- B.
Middle 1/3 of the linea aspera
- C.
Pectineal line
- D.
Pubis inferior to pubic crest
- E.
Ischial tuberosity
Correct Answer(s)
B. Middle 1/3 of the linea aspera
D. Pubis inferior to pubic crestExplanation
The attachments of the adductor longus muscle include the middle 1/3 of the linea aspera and the pubis inferior to the pubic crest. These are the two specific points where the muscle originates or attaches to. The other options mentioned, such as the inferior ramus of the pubis, pectineal line, and ischial tuberosity, are not the attachments of the adductor longus muscle.Rate this question:
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- 3.
Which of the following aid in plantar flexion of the ankle (more than one answer)?
- A.
Fibularis tertius
- B.
Tibialis anterior
- C.
Gastrocnemius
- D.
Tibialis posterior
- E.
Fibularis longus
Correct Answer(s)
C. Gastrocnemius
D. Tibialis posterior
E. Fibularis longusExplanation
The gastrocnemius, tibialis posterior, and fibularis longus muscles all aid in plantar flexion of the ankle. The gastrocnemius is a large calf muscle that helps to push the foot downward, while the tibialis posterior is located on the back of the leg and assists in both plantar flexion and inversion of the foot. The fibularis longus, also known as the peroneus longus, is located on the outer side of the lower leg and helps to turn the foot outward and downward.Rate this question:
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- 4.
Which of the following are innervated by L5 and S1 spinal nerves (more than one answer)?
- A.
Iliococcygeus
- B.
Obturator internus
- C.
Gluteus maximus
- D.
Bulbospongiosus
- E.
Superior gemellus
Correct Answer(s)
B. Obturator internus
C. Gluteus maximus
E. Superior gemellus -
- 5.
Which muscle attaches to the inferior ramus of the pubis, the ramus of the ischium, the ischial tuberosity, the gluteal tuberosity, the linea aspira along the entire length, the medial supracondylar line, and the adductor tubercle of the femur?
- A.
Obturator externus
- B.
Adductor magnus
- C.
Aductor longus
- D.
Vastus medialis
- E.
Iliopsoas
Correct Answer
B. Adductor magnusExplanation
The adductor magnus muscle attaches to the inferior ramus of the pubis, the ramus of the ischium, the ischial tuberosity, the gluteal tuberosity, the linea aspira along the entire length, the medial supracondylar line, and the adductor tubercle of the femur.Rate this question:
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- 6.
Which does not affect lateral rotation of an extended thigh?
- A.
Piriformis
- B.
Obturator internus
- C.
Superior and inferior gemelli
- D.
Gluteus minimus
- E.
Gluteus maximus
Correct Answer
D. Gluteus minimusExplanation
The gluteus minimus is a small muscle located in the buttocks. It is responsible for various movements of the hip joint, including abduction and medial rotation. However, it does not play a significant role in lateral rotation of an extended thigh. Lateral rotation of the extended thigh is primarily controlled by the piriformis, obturator internus, and the superior and inferior gemelli muscles. The gluteus maximus, on the other hand, is responsible for extension and lateral rotation of the hip joint, but it is not specifically involved in lateral rotation of an extended thigh.Rate this question:
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- 7.
Which muscles attach proximally on the ASIS? (Select all that apply)
- A.
Sartorius
- B.
Rectus femoris
- C.
Pectineus
- D.
Vastus lateralis
- E.
Tensor fascia latta
Correct Answer(s)
A. Sartorius
B. Rectus femoris
E. Tensor fascia lattaExplanation
The muscles that attach proximally on the ASIS (anterior superior iliac spine) are the sartorius, rectus femoris, and tensor fascia lata. The sartorius muscle originates from the ASIS and runs down the thigh. The rectus femoris muscle also originates from the ASIS and is one of the quadriceps muscles. The tensor fascia lata muscle originates from the ASIS and inserts into the iliotibial tract. These muscles play a role in various movements of the hip and thigh.Rate this question:
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- 8.
Which muscles are innervated by the superficial fibular nerve?
- A.
Extensor digitorum longus
- B.
Extensor hallucis longus
- C.
Fibularis longus
- D.
Fibularis brevis
- E.
Gastrocnemius
Correct Answer(s)
C. Fibularis longus
D. Fibularis brevisExplanation
The muscles innervated by the superficial fibular nerve are the fibularis longus and fibularis brevis.Rate this question:
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- 9.
Which of the following muscles are innervated by the obturator nerve?
- A.
Semitendinosis
- B.
Gracilis
- C.
Adductor longus
- D.
Biceps femoris
- E.
Rectus femoris
Correct Answer(s)
B. Gracilis
C. Adductor longusExplanation
The obturator nerve innervates the gracilis and adductor longus muscles. The semitendinosus, biceps femoris, and rectus femoris muscles are not innervated by the obturator nerve.Rate this question:
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- 10.
What is the proximal attachment of the soleus?
- A.
Lateral epicondyle of the femur
- B.
Lateral condyle of the tibia
- C.
Posterior aspect of the head of the fibula
- D.
Popliteal surface of the femur superior to the medial epicondyle
- E.
Superior two thirds of the lateral surface of the fibula
Correct Answer
C. Posterior aspect of the head of the fibulaExplanation
The proximal attachment of the soleus is the posterior aspect of the head of the fibula. This means that the soleus muscle is attached to the back part of the head of the fibula bone.Rate this question:
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- 11.
Which muscle flexes, abducts and laterally rotates the thigh at the hip joint?
- A.
Pectineus
- B.
Sartorius
- C.
Iliopsoas
- D.
Tensor fascia lata
- E.
Gluteus minimus
Correct Answer
B. SartoriusExplanation
The sartorius muscle is responsible for flexing, abducting, and laterally rotating the thigh at the hip joint. It is the longest muscle in the body and runs diagonally across the front of the thigh. Its actions allow for movements such as crossing the legs and sitting cross-legged. The other options listed are not involved in all three of these movements.Rate this question:
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- 12.
Which muscle has attachments at the perineal body and and the internal surface of the ischial tuberosity and ischiopubic ramis?
- A.
Ischiocavernosis
- B.
Transverse perineal
- C.
Bulbospongiosus
- D.
Pubococcygeus
- E.
Iliococcygeus
Correct Answer
B. Transverse perinealExplanation
The transverse perineal muscle is the correct answer because it has attachments at the perineal body, which is located between the anus and the vagina in females or the scrotum in males, and the internal surface of the ischial tuberosity and ischiopubic ramus. This muscle helps to support the pelvic organs and aids in maintaining continence.Rate this question:
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- 13.
Which is not innervated by the tibial nerve?
- A.
Plantarus
- B.
Poplitius
- C.
Tibialis anterior
- D.
Tibialis posterior
- E.
Gastrocnemius
Correct Answer
C. Tibialis anteriorExplanation
The tibialis anterior muscle is innervated by the deep fibular nerve, not the tibial nerve. The deep fibular nerve is a branch of the common fibular nerve, which is a branch of the sciatic nerve. The tibial nerve, on the other hand, innervates the tibialis posterior, plantaris, gastrocnemius, and popliteus muscles. Therefore, the tibialis anterior is the correct answer as it is not innervated by the tibial nerve.Rate this question:
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- 14.
Which of the following muscles extends the thigh and rotates the thigh medially when the knee is flexed?
- A.
Semitendinosus
- B.
Semimembranosus
- C.
Biceps femoris
- D.
Obturator externus
- E.
Gracilus
Correct Answer(s)
A. Semitendinosus
B. SemimembranosusExplanation
The semitendinosus and semimembranosus muscles are both part of the hamstring group and are responsible for extending the thigh and rotating it medially when the knee is flexed. The biceps femoris muscle is also part of the hamstring group but it is responsible for extending the thigh and rotating it laterally when the knee is flexed. The obturator externus muscle is not involved in thigh extension or medial rotation. The gracilis muscle is responsible for adduction of the thigh, not extension or medial rotation.Rate this question:
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- 15.
Which of the following is not innervated by the superior gluteal nerve?
- A.
Gluteus maximus
- B.
Gluteus medius
- C.
Gluteus minimus
- D.
Tensor fascia lata
Correct Answer
A. Gluteus maximusExplanation
The gluteus maximus is not innervated by the superior gluteal nerve. The superior gluteal nerve primarily innervates the gluteus medius, gluteus minimus, and tensor fascia lata muscles. The gluteus maximus, on the other hand, is innervated by the inferior gluteal nerve.Rate this question:
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Current Version
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Jan 19, 2024Quiz Edited by
ProProfs Editorial Team -
Nov 25, 2009Quiz Created by
Day4517
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