Muscle Attachment And Innervation Quiz

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.

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.

The muscles innervated by the superficial fibular nerve are the fibularis longus and fibularis brevis.

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.

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.

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.

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.

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.

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.

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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.

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.

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.

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.

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.