Name:

Muscles of the Hip and Lower LimbLaboratory Exercise 23

Background

The muscles that move the thigh are attached to the femur and to some part of thepelvic girdle. Those attached anteriorly primarily act to flex the thigh at the hip,whereas those attached posteriorly act to extend, abduct, or rotate the thigh.The muscles that move the leg connect the tibia or fibula to the femur or to the pelvicgirdle. They function to flex or extend the leg at the knee. Other muscles, located inthe leg, act to move the foot.

Materials Needed

TextbookArticulated skeletonMuscular model of the lower limb

Purpose of the Exercise

Review the actions, origins, and insertions of the musclesthat move the thigh, leg, and foot.

Procedure

1. Label figures 23.1, 23.2, 23.3, 23.4, 23.5, and 23.6.

2. Try to locate the muscles, labeled in the diagrams,in your own body:

3. Demonstrate the action of these muscles in yourown body.

4. Locate the origins and insertions of these musclesin the human skeleton.

5. Complete Parts A, and B.

Figure 23.1 Label the muscles of the anterior right hip and thigh.

Figure 23.2 Label the muscles of the lateral right hip and thigh.

Figure 23.3 Label the muscles of the posterior right hip and thigh.

Figure 23.4 Label the muscles of the anterior right leg.

Figure 23.5 Label the muscles of the lateral right leg.

Figure 23.6 Label the muscles of the posterior right leg.

Part A

Match the muscles in column B with the actions in column A. Place the letter of yourchoice in the space provided.

Column A Column B

___ 1. Adducts thigh a. Biceps femoris

___ 2. Plantar flexion and eversion of foot b. Fibularis

___ 3. Flexes thigh at the hip c. Flexor halluces longus

___ 4. Flexes thigh and rotates it laterally d. Gluteus medius

___ 5. Flexion of great toe e. Popliteus

___ 6. Abducts thigh and rotates it medially f. Psoas major and iliacus

___ 7. Plantar flexion and inversion of foot g. Quadriceps femoris group

___ 8. Flexes leg at the knee h. Sartorius

__ 9. Extends leg at the knee i. Tibialis anterior

___10. Dorsiflexion and inversion of foot j. Tibialis posterior

___11. Rotates femur laterally k. Gracilis

Part B

Name the muscle indicated by the following combinations of origin and insertion.

Origin Insertion Muscle

1. Lateral surface of ilium Greater trochanter of femur

2. Ischial tuberosity Posterior surface of medial condyle on tibia

3. Anterior superior iliac spine Medial surface of tibia

4. Lateral and medial condylesof femur

Calcaneus by calcaneal tendon

5. Iliac crest Fascia (iliotibial tract) ofthe thigh

6. Lateral anterior femur on linea aspera

Patella to tibial tuberosity

7. Ischial tuberosity Proximal medial surface of tibia

8. Anterior inferior iliac spine Patella to tibial tuberosity

9. Posterior surface of tibia Inferior surface of fourlateral toes

10. Lateral condyle and lateralshaft of tibia

Cuneiform and firstmetatarsal