Highlight and name the origin and insertion areas for the; Biceps Femoris, Semimenbranousus, Semitendinousus, Gluteus maximus, and...

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Medical Sciences

Highlight and name the origin and insertion areas for the;Biceps Femoris, Semimenbranousus, Semitendinousus, Gluteus maximus,and the six Deep lateral rotators. Then, show their primary andsecondary (and tertiary if they have three functions)functions/movements they produce. Which of the five muscles has theGREATEST force generating capacity, and which has the LEAST andwhy?

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Biceps femoris The biceps femoris is a muscle of the thigh located to the posterior or back it has two parts one of which the long head forms part of the hamstrings muscle group Origin tuberosity of the ischium linea aspera femur It has two heads of origin the long head arises from the lower and inner impression on the posterior part of the tuberosity of the ischium This is a common tendon origin with the semitendinosus muscle and from the lower part of the sacrotuberous ligament the short head arises from the lateral lip of the linea aspera between the adductor magnus and vastus lateralis extending up almost as high as the insertion of the gluteus maximus from the lateral prolongation of the linea aspera to within 5 cm of the lateral condyle and from the lateral intermuscular septum The two muscle heads joint together distally and unite in an intricate fashion The fibers of the long head form a fusiform belly which passes obliquely downward and lateralward across the sciatic nerve to end in an aponeurosis which covers the posterior surface of the muscle and receives the fibers of the short head Inferiorly the aponeurosis condenses to form a tendon which predominantly inserts onto the lateral side of the head of the fibula There is a second small insertional attachment by a small tendon slip into the lateral condyle of the tibia At its insertion the tendon divides into two portions which embrace the fibular collateral ligament of the kneejoint Together this joining of tendons is commonly referred to as the conjoined tendon of the knee From the posterior border of the tendon a thin expansion is given off to the fascia of the leg The tendon of insertion of this muscle forms the lateral hamstring the common fibular peroneal nerve descends along its medial border Insertion the head of the fibula which articulates with the back of the lateral tibial condyle Action flexes knee joint laterally rotates knee joint when knee is flexed extends hip joint long head only Both heads of the biceps femoris perform knee flexion Since the long head originates in the pelvis it is also involved in hip extensionThe long head of the biceps femoris is a weaker knee flexor when the hip is extended because of active See Answer

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