In this chapter you will learn about the following: Muscles crossing hip and knee joints, movements of the thigh, summary of movement at the hip joint, muscles of the thigh that move the knee joint, fascia of the leg, muscles of the leg: movements,. | 10 The Muscular System: Part D Muscles Crossing Hip and Knee Joints Most anterior muscles flex the femur at the hip and extend the leg at the knee (foreswing of walking) Most posterior muscles extend the thigh and flex the leg (backswing of walking) Medial muscles all adduct the thigh All three groups are enclosed by the fascia lata PLAY A&P Flix™: Muscles that act on the hip joint and femur: An overview Movements of the Thigh Include flexion, extension, abduction, adduction, circumduction, and rotation Thigh flexors pass in front of the hip joint Iliopsoas (iliacus and psoas major): prime mover of flexion Tensor fasciae latae Rectus femoris Assisted by medial adductors and sartorius PLAY A&P Flix™: Anterior muscles that cross the hip joint Figure Psoas minor Iliac crest Psoas major Iliopsoas 12th rib Quadratus lumborum Iliacus Anterior superior iliac spine Tensor fasciae latae Pectineus Sartorius Quadriceps femoris • Rectus femoris • Vastus lateralis • Vastus medialis (a) Adductor magnus Patella Patellar ligament Tendon of quadriceps femoris 12th thoracic vertebra 5th lumbar vertebra Adductor longus Gracilis Movements of the Thigh PLAY A&P Flix™: Tensor fasciae latae PLAY A&P Flix™: Iliopsoas PLAY A&P Flix™: Rectus femoris PLAY A&P Flix™: Sartorius Movements of the Thigh Thigh extensors Hamstring muscles (prime movers of extension) Biceps femoris Semitendinosus Semimembranosus Gluteus maximus (prime mover during forceful extension) Figure Gluteus medius Gluteus maximus Adductor magnus Gracilis Iliotibial tract Long head Semitendinosus Semimembranosus Short head Biceps femoris Hamstrings (a) Movements of the Thigh PLAY A&P Flix™: Semitendinosus PLAY A&P Flix™: Biceps femoris PLAY A&P Flix™: Semimembranosus Movements of the Thigh Adductors (also medially rotate thigh) Adductor magnus Adductor longus Adductor brevis Pectineus Gracilis PLAY A&P Flix™: Medial muscles that cross the hip joint Figure (b) O = origin I = insertion Adductor magnus . | 10 The Muscular System: Part D Muscles Crossing Hip and Knee Joints Most anterior muscles flex the femur at the hip and extend the leg at the knee (foreswing of walking) Most posterior muscles extend the thigh and flex the leg (backswing of walking) Medial muscles all adduct the thigh All three groups are enclosed by the fascia lata PLAY A&P Flix™: Muscles that act on the hip joint and femur: An overview Movements of the Thigh Include flexion, extension, abduction, adduction, circumduction, and rotation Thigh flexors pass in front of the hip joint Iliopsoas (iliacus and psoas major): prime mover of flexion Tensor fasciae latae Rectus femoris Assisted by medial adductors and sartorius PLAY A&P Flix™: Anterior muscles that cross the hip joint Figure Psoas minor Iliac crest Psoas major Iliopsoas 12th rib Quadratus lumborum Iliacus Anterior superior iliac spine Tensor fasciae latae Pectineus Sartorius Quadriceps femoris • Rectus femoris • Vastus lateralis • Vastus medialis (a) .
