Glossary of muscles that act on the femur, tibia and fibula
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- What muscles are the GAP muscles of the thigh?
- Adductor Magnus, longus, and brevis and pectineus and gracilis
- What is the action of the GAP muscles?
- Adducts, medially rotate thigh-flexes thigh, and gracilis flexes leg
- Where does the Gracilis muscle originate and insert?
- Pubis, and medial surface of body of tibia
- What is the nerve innervation for the GAP muscles?
- Obturater Nerve
- How is the gracilis able to rotate the thigh, and also flex the leg?
a. It is the largest muscle in the body
b. It crosses both the hip joint and the knee joint
c. It originates at the greater trochanter of the femur and inserts on medial
- B. It crosses both the hip joint and the knee joint
- What muscle of the thigh is considered the largest muscle of the body?
- Quadriceps femoris
- Where do all four of the muscles that make up the quadriceps femoris insert?
- Tibial tuberosity
- Where does the rectus femoris originate?
- Anterior inferior iliac spine ( AIIS )
- Where does the vastus lateralis originate?
- Greater trochanter and linea aspera
- Where does the vastus medialis originate?
- Linea aspera
- Where does the Vastus intermedius originate?
- Anterior body of the femur
- Name the four smaller muscles that make up the Quadriceps femoris
- rectus femoris, vastus lateralis, vastus medialis, and vastus intermedius
- What is the action of the Quads?
- extend leg, and rectus femoris flexes thigh when acting alone
- What is the nerve innervation for the quads and sartorius muscle?
- Femoral Nerve
- What is the longest muscle of the body?
- Where does the sartorius muscle originate and insert?
- ASIS-Anterior Superior iliac spine and medial surface of the body of tibia
- What 3 muscles insert on the Medial surface of the body of the Tibia?
- Gracilis, Sartorius, and Semitendinosus
- What is the action of the sartorius?
- flexes leg at knee, flexes aBducts, and laterally rotates thigh at hip
- What two muscles my impinge the femoral nerve?
- Quadraus Lumborum and Psoas
- Name the 3 hamstring muscles
- Biceps femoris, semitendinosus, and semimembranosus
- Where does the biceps femoris originate and insert?
- Long head -ischial tuberosity+ Short head-linea aspera, and head of fibula
- Where does the Semitendinosus originate and insert?
- ischial tuberosity and medial surface of shaft of tibia
- Where does the semimembranosus originate and insert?
- Ischial tuberosity and posterior medial condyle of the tibia
- What muscles originate on the ischial tuberosity?
- Semitendinosus, semimembranosus, and long head of biceps femoris
- What is the action of the hamstrings?
- flexes knee and extends thigh
- What is the nerve innervation for the hamstrings?
- Sciatic nerve
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