Innervations Of Lower Limb
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Obturator internus
About This Quiz
Explore the innervations of the lower limb muscles, focusing on key muscles like obturator internus, obturator externus, gemelli, quadratus femoris, and piriformis. This quiz assesses understanding of nerve supply, crucial for medical students and professionals in anatomy and neurology.
Quiz Preview
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Obturator externus
Explanation
The obturator nerve is the correct answer because it innervates the obturator externus muscle. The obturator nerve originates from the lumbar plexus and travels through the obturator foramen to reach the medial compartment of the thigh. It provides motor innervation to the obturator externus muscle, which is responsible for laterally rotating the thigh and stabilizing the hip joint.Rate this question:
- 3.
Superior gemellus
Explanation
The superior gemellus muscle is innervated by the nerve to obturator internus. This means that the nerve to obturator internus is responsible for supplying the necessary motor signals to the superior gemellus muscle, allowing it to contract and perform its function.Rate this question:
- 4.
Inferior gemellus
Explanation
The nerve to quadratus femoris is the correct answer because the question is asking for the nerve that innervates the quadratus femoris muscle. The inferior gemellus muscle is not innervated by this nerve, so it is not the correct answer.Rate this question:
- 5.
Quadratus femoris
Explanation
The correct answer is "nerve to quadratus femoris." The quadratus femoris is a muscle located in the posterior hip region. It is innervated by the nerve to quadratus femoris, which provides motor innervation to the muscle. This nerve arises from the sacral plexus and specifically originates from the ventral rami of the L4, L5, and S1 spinal nerves. It travels alongside the quadratus femoris muscle, supplying it with the necessary motor signals for proper function.Rate this question:
- 6.
Piriformis
Explanation
The answer "nerve to piriformis" is likely referring to the nerve that innervates the piriformis muscle. The piriformis muscle is a small muscle located in the buttocks that helps to rotate the hip. It is innervated by the nerve to piriformis, which is a branch of the sacral plexus. This nerve originates from the ventral rami of the S1 and S2 spinal nerves and supplies motor innervation to the piriformis muscle.Rate this question:
- 7.
Gluteus maximus
Explanation
The gluteus maximus is a large muscle located in the buttocks. It is responsible for hip extension and external rotation. The inferior gluteal nerve is a branch of the sacral plexus that innervates the gluteus maximus muscle. This nerve provides motor function to the muscle, allowing it to contract and perform its actions. Therefore, the inferior gluteal nerve is the correct answer as it is directly related to the innervation of the gluteus maximus muscle.Rate this question:
- 8.
Gluteus medius
Explanation
The superior gluteal nerve innervates the gluteus medius muscle. This nerve originates from the sacral plexus and provides motor function to the gluteus medius, which is responsible for abduction and stabilization of the hip joint. Damage or dysfunction of the superior gluteal nerve can result in weakness or paralysis of the gluteus medius muscle, leading to difficulty in walking, standing, and maintaining balance.Rate this question:
- 9.
Gluteus minimus
Explanation
The gluteus minimus muscle is innervated by the superior gluteal nerve. This nerve arises from the sacral plexus and supplies motor innervation to the gluteus medius, gluteus minimus, and tensor fasciae latae muscles. It also provides sensory innervation to the skin overlying these muscles. Therefore, the superior gluteal nerve is responsible for the contraction and movement of the gluteus minimus muscle.Rate this question:
- 10.
Tensor fascia lata
Explanation
The superior gluteal nerve is the correct answer because it innervates the tensor fascia lata muscle. The tensor fascia lata is a muscle located in the hip region and is responsible for flexing, abducting, and medially rotating the hip joint. The superior gluteal nerve originates from the sacral plexus and supplies motor innervation to the gluteus medius, gluteus minimus, and tensor fascia lata muscles. Therefore, it is responsible for the innervation of the tensor fascia lata muscle.Rate this question:
- 11.
Biceps femoris
Explanation
The sciatic nerve is the correct answer because the question is asking for a possible explanation for the given terms "Biceps femoris" and "sciatic nerve." The biceps femoris is a muscle located in the back of the thigh, and it is innervated by the sciatic nerve. Therefore, the sciatic nerve is directly related to the biceps femoris muscle, making it a plausible explanation for the given terms.Rate this question:
- 12.
Semitendonosus
Explanation
The sciatic nerve is the correct answer because it is a major nerve that runs from the lower back down the back of each leg. It is the longest and widest nerve in the human body and provides sensation and motor function to the lower limbs. The other term, semitendonosus, refers to a specific muscle in the thigh and is not directly related to the sciatic nerve.Rate this question:
- 13.
Semimembranosus
Explanation
The sciatic nerve is the correct answer because it is a major nerve in the body that originates from the lower back and extends down the back of the thigh. The semimembranosus is a muscle located in the back of the thigh, and it is innervated by the sciatic nerve. Therefore, the sciatic nerve is responsible for providing the necessary motor and sensory innervation to the semimembranosus muscle.Rate this question:
- 14.
Adductor longus
Explanation
The obturator nerve is the correct answer because it innervates the adductor longus muscle. The adductor longus is one of the muscles in the medial compartment of the thigh, and it is responsible for adducting the thigh. The obturator nerve arises from the lumbar plexus and travels through the obturator foramen to reach the medial compartment of the thigh, where it supplies motor innervation to the adductor muscles, including the adductor longus. Therefore, the obturator nerve is the nerve that controls the adductor longus muscle.Rate this question:
- 15.
Adductor magnus
Explanation
The adductor magnus muscle is innervated by both the obturator nerve and the sciatic nerve. The obturator nerve supplies the anterior portion of the muscle, while the sciatic nerve innervates the posterior portion. This dual innervation allows for coordinated and efficient contraction of the adductor magnus muscle, which is responsible for adduction of the thigh at the hip joint.Rate this question:
- 16.
Adductor brevis
Explanation
The adductor brevis muscle is innervated by the obturator nerve. The obturator nerve is responsible for supplying motor innervation to the adductor muscles of the thigh, including the adductor brevis. This nerve originates from the lumbar plexus and passes through the obturator foramen to reach the medial compartment of the thigh. It plays a crucial role in controlling the adduction of the hip joint and contributes to the stability and movement of the lower limb. Therefore, the obturator nerve is the correct answer for the innervation of the adductor brevis muscle.Rate this question:
- 17.
Obturator externus
Explanation
The obturator nerve is the correct answer because it innervates the obturator externus muscle. The obturator nerve originates from the lumbar plexus and passes through the obturator foramen to reach the medial compartment of the thigh. It provides motor innervation to the obturator externus muscle, which is responsible for laterally rotating the hip joint. Therefore, the obturator nerve is directly related to the function of the obturator externus muscle.Rate this question:
- 18.
Pectineus
Explanation
The pectineus muscle is innervated by both the femoral nerve and the obturator nerve. These nerves are responsible for providing motor and sensory innervation to different parts of the body. The femoral nerve innervates the anterior thigh muscles, including the pectineus, while the obturator nerve innervates the medial thigh muscles, including the pectineus. Therefore, both nerves play a role in innervating the pectineus muscle.Rate this question:
- 19.
Sartorius
Explanation
The femoral nerve is a major nerve in the body that originates from the lumbar spine and supplies sensation and motor function to the thigh and leg. Sartorius is a muscle in the thigh that is innervated by the femoral nerve. Therefore, the correct answer is femoral nerve because it is the nerve that innervates the sartorius muscle.Rate this question:
- 20.
Gracilis
- 21.
Rectus femoris
Explanation
The femoral nerve is the correct answer because the rectus femoris muscle is innervated by the femoral nerve. The femoral nerve is a major nerve in the lower extremity that originates from the lumbar plexus and supplies motor and sensory innervation to the muscles and skin of the anterior thigh and leg. The rectus femoris is one of the four quadriceps muscles located in the anterior thigh and is responsible for extending the leg at the knee joint. Therefore, the femoral nerve plays a crucial role in the innervation and function of the rectus femoris muscle.Rate this question:
- 22.
Vastus lateralis
Explanation
The femoral nerve innervates the vastus lateralis muscle. This means that the femoral nerve is responsible for supplying the necessary signals for the vastus lateralis muscle to contract and function properly. The vastus lateralis is one of the four muscles that make up the quadriceps muscle group in the thigh, and it is primarily responsible for extending the leg at the knee joint. Therefore, the femoral nerve plays a crucial role in the movement and control of the vastus lateralis muscle.Rate this question:
- 23.
Vastus medialis
Explanation
The femoral nerve is responsible for innervating the vastus medialis muscle. This muscle is located on the inner side of the thigh and is one of the four quadriceps muscles. The femoral nerve originates from the lumbar plexus and supplies motor and sensory innervation to the muscles and skin of the anterior thigh and medial leg. Therefore, the femoral nerve is the correct answer as it is directly related to the innervation of the vastus medialis muscle.Rate this question:
- 24.
Vastus intermedius
Explanation
The femoral nerve is the correct answer because it innervates the vastus intermedius muscle. The vastus intermedius is one of the four quadriceps muscles located in the anterior compartment of the thigh. It is responsible for extending the leg at the knee joint. The femoral nerve is a major nerve of the lower limb that originates from the lumbar plexus and provides motor innervation to the quadriceps muscles. Therefore, it is responsible for supplying the vastus intermedius muscle with the necessary nerve impulses for contraction and movement.Rate this question:
- 25.
Extensor digitorum longus
Explanation
The deep peroneal nerve innervates the extensor digitorum longus muscle. This muscle is responsible for extending (straightening) the toes, particularly the second to fifth toes. The deep peroneal nerve originates from the common peroneal nerve and runs along the anterior (front) compartment of the leg. It provides motor innervation to the muscles in this compartment, including the extensor digitorum longus. Therefore, the deep peroneal nerve is the correct answer as it is the nerve that supplies the extensor digitorum longus muscle.Rate this question:
- 26.
Peroneus tertius
Explanation
The deep peroneal nerve innervates the peroneus tertius muscle. This muscle is located in the anterior compartment of the leg and is responsible for dorsiflexion and eversion of the foot. The deep peroneal nerve originates from the common peroneal nerve and provides motor innervation to the muscles in the anterior compartment of the leg, as well as sensation to the skin between the first and second toes. Therefore, the deep peroneal nerve is the correct answer as it is directly related to the innervation of the peroneus tertius muscle.Rate this question:
- 27.
Tibialis anterior
Explanation
The deep peroneal nerve is responsible for innervating the tibialis anterior muscle. This muscle is located in the front of the lower leg and is responsible for dorsiflexion of the foot and inversion of the ankle. The deep peroneal nerve originates from the sciatic nerve and travels down the leg to innervate various muscles, including the tibialis anterior. Damage to the deep peroneal nerve can result in weakness or paralysis of the tibialis anterior muscle, leading to difficulty in lifting the foot and walking.Rate this question:
- 28.
Extensor hallucis longus
Explanation
The deep peroneal nerve is responsible for innervating the extensor hallucis longus muscle. This muscle is located in the lower leg and is responsible for extending the big toe. When the deep peroneal nerve is functioning properly, it allows for the contraction of the extensor hallucis longus muscle, resulting in the extension of the big toe.Rate this question:
- 29.
Peroneus longus
Explanation
The given answer, superficial peroneal nerve, is correct because it is the nerve that innervates the peroneus longus muscle. The superficial peroneal nerve is a branch of the common peroneal nerve and it provides sensory innervation to the skin on the anterior and lateral aspects of the lower leg and foot. It also innervates the peroneus longus and peroneus brevis muscles, which are responsible for eversion and plantar flexion of the foot. Therefore, the superficial peroneal nerve is the correct answer in this context.Rate this question:
- 30.
Peroneus brevis
Explanation
The peroneus brevis muscle is innervated by the superficial peroneal nerve. This nerve is a branch of the common peroneal nerve and provides sensory innervation to the skin on the lower leg and foot. The peroneus brevis muscle is responsible for eversion of the foot and stabilization of the ankle joint. Therefore, damage to the superficial peroneal nerve can result in weakness or paralysis of the peroneus brevis muscle, leading to difficulty in eversion of the foot and ankle instability.Rate this question:
- 31.
Gastrocnemius
Explanation
The tibial nerve is the correct answer because it is the main nerve that innervates the gastrocnemius muscle. The gastrocnemius muscle is located in the calf region of the leg and is responsible for plantar flexion of the foot. The tibial nerve originates from the sciatic nerve and runs down the back of the leg, supplying motor and sensory innervation to the muscles and skin of the calf and foot. Therefore, any dysfunction or injury to the tibial nerve can result in weakness or sensory changes in the gastrocnemius muscle.Rate this question:
- 32.
Plantaris
Explanation
The plantaris muscle is innervated by the tibial nerve. The tibial nerve is a branch of the sciatic nerve, which originates in the lower back and travels down the leg. It provides motor and sensory innervation to the posterior compartment of the leg, including muscles such as the plantaris. Therefore, the tibial nerve is responsible for supplying the necessary nerve signals to the plantaris muscle for its proper function.Rate this question:
- 33.
Soleus
Explanation
The tibial nerve is the correct answer because the question is asking for the nerve that innervates the soleus muscle. The soleus muscle is located in the calf and is responsible for plantarflexion of the foot. The tibial nerve is a branch of the sciatic nerve and supplies motor and sensory innervation to the muscles of the posterior compartment of the leg, including the soleus.Rate this question:
- 34.
Popliteus
Explanation
The popliteus muscle is innervated by the tibial nerve. The tibial nerve is a branch of the sciatic nerve and provides motor innervation to the muscles of the posterior compartment of the leg, including the popliteus muscle. This muscle is responsible for unlocking the knee joint by internally rotating the tibia, and its innervation by the tibial nerve allows for proper functioning of this movement. Therefore, the correct answer is tibial nerve.Rate this question:
- 35.
Flexor hallucis longus
Explanation
The flexor hallucis longus is a muscle located in the leg that helps to flex the big toe. It is innervated by the tibial nerve, which is a branch of the sciatic nerve. The tibial nerve provides motor and sensory innervation to the posterior compartment of the leg, including the flexor hallucis longus muscle. This means that the tibial nerve is responsible for transmitting the signals that allow the flexor hallucis longus to contract and perform its function of flexing the big toe.Rate this question:
- 36.
Flexor digitorum longus
Explanation
The flexor digitorum longus is innervated by the tibial nerve. The tibial nerve is a branch of the sciatic nerve and provides motor innervation to the muscles of the posterior compartment of the leg, including the flexor digitorum longus. This muscle is responsible for flexing the toes, and its innervation by the tibial nerve allows for proper movement and control of the toes.Rate this question:
- 37.
Tibialis posterior
Explanation
The tibialis posterior is a muscle located in the posterior compartment of the leg. It is innervated by the tibial nerve, which is a branch of the sciatic nerve. The tibial nerve provides motor innervation to the tibialis posterior muscle, allowing it to perform its functions of plantarflexion and inversion of the foot. Additionally, the tibial nerve also supplies sensory innervation to the sole of the foot, making it an important nerve for both motor and sensory functions in the lower leg and foot.Rate this question:
- 38.
Abductor hallucis
Explanation
The abductor hallucis is a muscle located in the foot that is responsible for moving the big toe away from the other toes. It is innervated by the medial plantar nerve, which supplies motor and sensory innervation to the muscles and skin of the medial side of the foot. Therefore, the correct answer is medial plantar nerve.Rate this question:
- 39.
Flexor digitorum brevis
Explanation
The flexor digitorum brevis is a muscle located in the foot that helps to flex the toes. It is innervated by the medial plantar nerve, which is a branch of the tibial nerve. The medial plantar nerve supplies motor innervation to the muscles on the medial side of the foot, including the flexor digitorum brevis. Therefore, the correct answer is the medial plantar nerve.Rate this question:
- 40.
Abductor digiti minimi
Explanation
The abductor digiti minimi is a muscle located in the foot that is responsible for moving the little toe away from the other toes. The lateral plantar nerve is a branch of the tibial nerve that supplies sensation and motor function to the sole of the foot. Since the abductor digiti minimi is a muscle in the foot, it requires innervation from a nerve in order to function. The lateral plantar nerve is the correct answer because it is the specific nerve that supplies the abductor digiti minimi muscle, allowing it to perform its function.Rate this question:
- 41.
Quadratus plantae
Explanation
The quadratus plantae is a muscle located in the foot that helps to flex the toes. The lateral plantar nerve is responsible for supplying motor and sensory innervation to the muscles of the foot, including the quadratus plantae. Therefore, the lateral plantar nerve is the correct answer as it is directly involved in the innervation of the quadratus plantae muscle.Rate this question:
- 42.
Lumbricals of the foot
Explanation
The lumbricals of the foot are innervated by the medial 1-medial plantar nerve and the lateral 3-lateral plantar nerve. The lumbricals are a group of muscles in the foot that flex the metatarsophalangeal joints and extend the interphalangeal joints. The medial 1 lumbrical is innervated by the medial plantar nerve, while the lateral 3 lumbricals are innervated by the lateral plantar nerve. Therefore, the correct answer is that the medial 1 lumbrical is innervated by the medial plantar nerve and the lateral 3 lumbricals are innervated by the lateral plantar nerve.Rate this question:
- 43.
Flexor hallucis brevis
Explanation
The correct answer is medial plantar nerve. The flexor hallucis brevis is a muscle located in the foot that plays a role in flexing the big toe. It is innervated by the medial plantar nerve, which supplies motor and sensory innervation to the muscles and skin on the medial side of the foot. Therefore, the medial plantar nerve is responsible for providing the necessary nerve signals for the flexor hallucis brevis to contract and perform its function.Rate this question:
- 44.
Adductor hallucis
Explanation
The adductor hallucis is a muscle located in the foot that is responsible for adducting the big toe. It is innervated by the deep branch of the lateral plantar nerve. This nerve provides motor innervation to the muscles of the foot and also carries sensory information from the foot. Therefore, the deep branch of the lateral plantar nerve is the correct answer as it is the nerve that supplies the adductor hallucis muscle.Rate this question:
- 45.
Flexor digiti minimi brevis
Explanation
The correct answer is the superficial branch of the lateral plantar nerve. The flexor digiti minimi brevis is a muscle located in the foot. It is innervated by the superficial branch of the lateral plantar nerve, which is a branch of the tibial nerve. This nerve provides sensory innervation to the skin on the lateral aspect of the foot and motor innervation to various muscles in the foot, including the flexor digiti minimi brevis. Therefore, the superficial branch of the lateral plantar nerve is responsible for supplying the innervation to the flexor digiti minimi brevis muscle.Rate this question:
- 46.
Plantar interossei
Explanation
The lateral plantar nerve is responsible for innervating the plantar interossei muscles. These muscles are located in the foot and are responsible for flexing the toes and aiding in balance and stability. Therefore, the lateral plantar nerve is the correct answer as it is the nerve that supplies the plantar interossei muscles with the necessary motor innervation.Rate this question:
- 47.
Dorsal interossei
Explanation
The lateral plantar nerve innervates the dorsal interossei muscles. These muscles are located in the foot and are responsible for abduction and adduction of the toes. The lateral plantar nerve is a branch of the tibial nerve and provides motor and sensory innervation to the muscles and skin on the lateral side of the foot. Therefore, it is responsible for supplying the necessary nerve impulses to the dorsal interossei muscles, allowing them to function properly.Rate this question:
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