bicipital aponeurosis {Ans: }*biceps brachii* {Ans: -Origin =Short head: coracoid process of the scapula. =Long head: supraglenoid tubercle -Insertion Radial tuberosity and bicipital aponeurosis into deep fascia on medial part of forearm -Nerve Musculocutaneous nerve (C5-C7) -*Actions* =Flexes elbow, =supinates radioulnar joint in the forearm -*Antagonist* Triceps brachii muscle}*biceps femoris* {Ans: -Origin tuberosity of the ischium, linea aspera, femur -Insertion the *head of the fibula* which articulates with the back of the lateral tibial condyle -*Nerve* =long head: tibial nerve =short head: common fibular nerve -*Actions* =flexes knee joint, =laterally rotates knee joint (when knee is flexed), =extends hip joint (long head only) -Antagonist Quadriceps muscle}*semitendinosus* {Ans: -Origin Tuberosity of the ischium -Insertion *Pes anserinus* (tibia) -Nerve Sciatic (tibial, L5, S1, S2) -*Actions* Flexion of knee, extension of the hip joint -Antagonist Quadriceps muscle}**gluteus maximus** {Ans: -Origin Gluteal surface of ilium, lumbar fascia, sacrum, sacrotuberous ligament -Insertion Gluteal tuberosity of the femur and iliotibial tract -Nerve *Inferior gluteal nerve* (L5, S1 and S2 nerve roots) -*Actions* =External rotation and extension of the hip joint =chief antigravity muscle in sitting and abduction of the hip -Antagonist iliopsoas}*soleus* {Ans: -Origin fibula, medial border of tibia (soleal