Gross Anatomy I: Muscles of the anterior hip, anterior thigh, and medial thigh

What are the muscles of the anterior hip region?

1. Iliacus

2. Psoas Major

3. Psoas Minor

What are the origins of the iliacus?

1. Iliac Fossa

2. Sacrum

What is the insertion of the iliacus?

Lesser Trochanter/Femur

What actions does the iliacus carry out?

1. Flexion of the femur at the hip joint

2. Helps maintain posture (integrity of the spine)

What is the nerve supply of the iliacus?

Femoral Nerve

What are the origins of the psoas major?

1. Bodies of lumbar vertebrae

2. Transverse processes of lumbar vertebrae

What is the insertion of the psoas major?

Lesser Trochanter/Femur

What actions does the psoas major carry out?

1. Flexion of the femur at the hip joint

2. Helps maintain posture (integrity of the spine)

What is the nerve supply of the psoas major?

Femoral Nerve

What is the origin of the psoas minor?

Bodies of T12-L2 vertebrae

What is the insertion of the psoas minor?

Iliopubic Eminence/Pubis

What action does the psoas minor carry out?

Flexion of the pelvic bone (upward movement)

What is the nerve supply of the psoas minor?

L1 (sometimes L2)

What are the anterior thigh muscles?

1. Sartorius

2. Rectus Femoris

3. Vastus Lateralis

4. Vastus Medialis

5. Vastus Intermedius

Which anterior thigh muscles make up the quadriceps?

1. Rectus Femoris

2. Vastus Lateralis

3. Vastus Medialis

4. Vastus Intermedius

What is the origin of the sartorius?

Anterior Superior Iliac Spine

What is the insertion of the Sartorius?

Superior Medial Shaft/Tibia

What actions does the sartorius carry out?

1. Abducts the femur

2. Laterally rotates the femur

3. Medially rotates the leg

4. Assists with flexion at the hip and knee when both are carried out simultaneously

What is the nerve supply of the sartorius?

Femoral Nerve

What are the origins of the rectus femoris?

1. Anterior Inferior Iliac Spine

2. Acetabulum/Pelvic Bone

What is the insertion of the rectus femoris?

Base/Patella

What actions does the rectus femoris carry out?

1. Extends leg at the knee joint

2. Flexion at the hip joint

3. Tonus of muscles play a role in strengthening the knee

What is the nerve supply of the rectus femoris?

Femoral Nerve

What are the origins of the vastus lateralis?

1. Greater Trochanter/Femur

2. Intertrochanteric Line/Femur

3. Linea Aspera/Femur

What is the insertion of the vastus lateralis?

Base/Patella

What actions does the vastus lateralis carry out?

1. Extends leg at the knee joint

2. Tonus of muscles play a role in strengthening the knee

What is the nerve supply of the vastus lateralis?

Femoral Nerve

What are the origins of the vastus medialis?

1. Linea Aspera/Femur

2. Intertrochanteric Line/Femur

What is the insertion of the vastus medialis?

Base/Patella

What actions does the vastus medialis carry out?

1. Extends leg at the knee joint

2. Tonus of muscles play a role in strengthening the knee

What is the nerve supply of the vastus medialis?

Femoral Nerve

What is the origin of the vastus intermedius?

Antero-lateral Aspect/Femur

What is the insertion of the vastus intermedius?

Base/Patella

What actions does the vastus intermedius carry out?

1. Extends leg at the knee joint

2. Tonus of muscles play a role in strengthening the knee

What is the nerve supply of the vastus intermedius?

Femoral Nerve

What are the muscles of the medial thigh?

1. Gracilis

2. Pectineus

3. Adductor Longus

4. Adductor Brevis

5. Adductor Magnus

What are the origins of the gracilis muscle?

1. Ramus/Ischium

2. Inferior Ramus/Pubis

What is the insertion of the gracilis?

Superior Medial Shaft/Tibia

What actions does the gracilis carry out?

1. Flexion of the leg

2. Adducts the femur

What is the nerve supply of the gracilis?

Obturator Nerve

What is the origin of the pectineus?

Superior Rami (Pubis Pectin)/Pubis

What are the insertions of the pectineus?

1. Pectineal Line/Femur

2. Linea Aspera/Femur

What actions does the pectineus carry out?

1. Adducts Femur

2. Flexion of the Femur at the hip joint

What is the nerve supply to the pectineus?

1. Femoral Nerve

2. Obturator Nerve

What is the origin of the adductor longus?

Superior Ramus/Pubis

What is the insertion of the adductor longus?

Linea Aspera/Femur

What action does the adductor longus carry out?

Adducts femur

What is the nerve supply of the adductor longus?

Obturator Nerve

What is the origin of the adductor brevis?

Inferior Ramus/Pubis

What are the insertions of the adductor brevis?

1. Pectineal Line/Femur

2. Linea Aspera/Femur

What action does the adductor brevis carry out?

Adducts femur

What is the nerve supply of the adductor brevis?

Obturator Nerve

What is the origin of the adductor magnus?

Rami/Ischium and Pubis

What are the insertions of the adductor magnus?

1. Linea Aspera/Femur

2. Adductor Tubercle/Femur

What actions does the adductor magnus carry out?

1. Adducts femur

2. Extends femur at the hip joint

What is the nerve supply of the adductor magnus?

1. Obturator Nerve

2. Sciatic Nerve