1. Muscles: Origins, Insertions, Actions, Nerve Supply, & Arterial Supply
BY 115/115L

2. Basic Vocabulary Agonist – performing the action
Antagonist – opposite of the agonist/performs opposite action
Synergist – assists the agonist
Insertion – more distal and lateral/joint where primary movement takes place
Origin – more proximal attached end/where muscle “originates”

3. Tendon of quadriceps femoris
Tendon – muscle to bone
Ligament – bone to bone
Tendon of quadriceps femoris
Patellar Ligament

4. Aponeurosis – muscle to muscle
Palmar Aponuerosis

5. Blood Supply – Lower Extremities
Superior & Inferior Gluteal Arteries
Femoral & Obturator Arteries
Deep Femoral Artery
Popliteal Artery Branches
Posterior
Anterior

6. Nerve Supply – Lower Extremities
Gluteal Nerves
Superior = Gluteus med., Gluteus min.& Tensor Fascia Latae
Inferior = Gluteus Max.
Femoral Nerve
Tibial branch of sciatic nerve
Obturator Nerve
Deep Fibular Nerve
Posterior
Anterior

7. Actions
A muscle that crosses on the anterior side of a joint produces flexion.
A muscle that crosses on the posterior side of a joint produces extension.
A muscle that crosses on the lateral side of a joint produces abduction.
A muscle that crosses on the medial side of a joint produces adduction.

9. Tibialis Anterior Fibularis Longus
Videos
Tibialis Anterior Fibularis Longus

11. Hip Rotation Muscles Hip Movement Gluteus Maximus Gluteus Medius
Videos
Hip Rotation Muscles Hip Movement Gluteus Maximus Gluteus Medius

13. Pectineus Medial Thigh Muscles
Videos
Pectineus Medial Thigh Muscles

14. Extends Thigh; flexes leg Tibial Branch of Sciatic Nerve
Muscle
Origin
Insertion
Action
Nerve Supply
Arterial Supply
Hamstrings
Posterior compartment
Biceps Femoris
Ishial Tuberosity
Head of Fibula; lateral tibial condyle
Extends Thigh; flexes leg
Tibial Branch of Sciatic Nerve
Deep Femoral Artery
Semitendinosus
Medial surface of body of the tibia
Semimembranosus
Medial Tibial Condyle

15. Biceps Femoris Semitendinosus Semimembranosus
Videos
Biceps Femoris Semitendinosus Semimembranosus

16. Anterior Compartment Muscle Origin Insertion Action Nerve Supply
Arterial Supply
Quadriceps Femoris is formed from the first four muscles*
Anterior Compartment
*Rectus Femoris
AIIS
Tibial Tuberostity by way of the patella and patellar ligament
Flexes Thigh; Extends Leg
Femoral Nerve
Femoral Artery Branches
*Vastus lateralis
Greater Trochanter and Linea Aspera of Femur
Extends Leg
*Vastus medialis
Linea aspera of femur
*Vastus intermedius
Anterolateral femoral shaft
Sartorius
ASIS
Medial surface of body of the tibia
flexes leg; abducts and flexes thigh; rotates thigh laterally
Tensor fascia latae
Iliac Crest and ASIS
Tibia by way of the iliotibial tract
Stabalizes Torso on thigh when iliotibial tract is taut; flexes abducts thigh; rotates thigh medially
superior gluteal nerve

17. Videos
Rectus Femoris Vastus Lateralis Vastus Medialis Vastus Intermedius
Sartorius
Tensor Fascia Latae