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Video #9: Leg Muscles
1. Name the 4 muscles of the anterior thigh.
a)
b)
c)
d)
2. True or false. All but one quad muscle inserts into the patellar tendon.
3. How many joints does the Rectus Femoris cross?
4. Which Quadricep Muscle is considered to be the tear drop shaped muscle?
a) Vastus Intermedius
b) Vastus Medialis
c) Rectus Femoris
d) Vastus Laterlais
5. True or false. There is only one quad muscle that originates from the femur.
6. Please fill out the table to answer the origin, insertion and action of the
Quadricep Group.
Quadricep Group
Vastus Laterlais
Origin
Anterior inferior
iliac spine
Anterior and
lateral shaft of
femur
7. The Hamstrings are located on the
Insertion
Tibial tuberosity
(via patellar
tendon)
Tibial tuberosity
(via patellar
tendon)
Tibial tuberosity
(via patellar
tendon)
Action
Knee extension
side of the body.
8. What are the two dominating actions of the hamstring group?
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9. Which Hamstring muscle has two segments or bellies to it?
10. True or false. All hamstring muscle originate from the linea aspera.
11. True or false. The Biceps Femoris assists in external rotation of the hip and
tibia.
12. Please fill out the table to answer the origin, insertion and action of the
Hamstring Group.
Hamstring Group
Origin
Ischial tuberosity
Insertion
Posterior aspect
of medial condyle
of tibia
Head of fibula
Ischial tuberosity
Action
Knee flexion, hip
extension,
posterior pelvic
tilt
Assists in
hip/tibial external
rotation
Knee flexion, hip
extension,
posterior pelvic
tilt
Assists in
hip/tibial external
rotation
Knee flexion, hip
extension,
posterior pelvic
tilt
Assists in
hip/tibial medial
rotation
13. Which muscle in the Calf Group crosses two joints in the lower leg?
14. In layman’s terms, the Calcaneal tendon is considered to be the
and is responsible for controlling
flow in the lower leg.
15. True or false. Both muscle groups insert into the same point.
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tendon
16. Please fill out the table to answer the origin, insertion and action of the Calf
Group.
Calf Group
Origin
Posterior line of
the tibia and
posterior aspect
of head of fibula
Insertion
Calcaneus via
calcaneal tendon
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Action
Ankle
Plantarflexion