Chapter 6 The Muscular System 193 Copyright Goodheart-Willcox Co., Inc. 12th rib Adductor muscles 12th thoracic vertebra Gluteus medius Gluteus maximus Gastrocnemius Achilles tendon 5th lumbar vertebra Soleus Psoas major Iliac crest Iliacus Sartorius Anterior superior iliac spine Quadriceps Rectus femoris Vastus lateralis Vastus medialis Tibialis anterior Fibularis longus Fibularis brevis Fibularis tertius Extensor digitorum longus Quadriceps tendon Patellar ligament Tibia Anterior view Posterior view Iliopsoas Hamstring group Biceps femoris Semitendinosus Semimembranosus © Body Scientific International Figure 6.24 Major muscles of the lower limb.