Lab 8 - Musculoskeletal System III Flashcards
Femur: What is the origin and insertion of the gastrocnemius?
Origin: medial and lateral condyles of the femur
Insertion: Calcaneus
What muscle is the prime mover of hip flexion? Where is this muscle?
Iliopsas (anterior thigh)
What muscle is the synergist to the iliopsas?
Rectus femoris
What muscle is responsible for flexion, abduction, and lateral rotation of the hip?
Sartorius
What muscle is the prime mover of hip abduction?
Gluteus medius
What muscle is the synergist to the gluteus medius?
Tensor fasciae latae
What is the prime mover of hip extension?
Gluteus maximus
What muscles are responsible for hip extension?
1) Biceps femoris (lateral)
2) Semitendonosis (superficial)
3) Semimembranosus (deep)
Hamstrings
What are the muscles that extend the hip and flex the knee called?
Hamstrings
What do the hamstrings do?
Extend the hip and flex the knee
What muscles are located on the medial (inner) thigh?
1) Gracilis (middle)
2) Abductor longus
3) Abductor magnus
What muscles are responsible for abduction of the hip?
1) Gracilis (middle)
2) Abductor longus
3) Abductor magnus
What muscles extend the knee?
1) Rectus femoris (front of thigh)
2) Vastus lateralis (lateral)
3) Vastus medialis (medial)
4) Vastus intermedius (deep to rectus femoris)
Quads
What do the quads do?
Extend the knee
What muscles are responsible for flexion of the knee?
Sartorius (anterior thigh) and gastrocnemius (posterior leg)
What muscles are responsible for flexion of the knee?
1) Biceps femoris
2) Semitendonosis
3) Semimembranous
Hamstrings
What muscle is the prime mover of dorsiflexion (walking on your heels)?
Tibialis anterior
What muscles are responsible for plantar flexion (walking on your tiptoes)? Where are they located?
1) Gastrocnemius (for power)
2) Soleus (broad and flat muscle)
Both are on the posterior leg
What muscle is the prime mover of inversion of the foot (standing on the outside of your foot)?
Tibialis posterior (deep and behind tibia)
What muscle is responsible for eversion of the foot (standing on the inside of the foot)?
Fibularis longus
True or false: the quadriceps (quads) do forward movements
True (hip flexion and knee extension)
True or false: The fibula is lateral to the tibia
True
What makes eversion of the foot a small movement?
The lateral maleolus
