Module 2 Muscles Flashcards
Semimembranosus - Origin
Ischial tuberosity
Semimembranosus - Insertion
Posterior aspect of the medial condyle of the tibia
Semimembranosus - Innervation
Sciatic Nerve (tibial branch)
Semimembranosus - Actions
- Flex the tibiofemoral joint
- Medially rotate the flexed tibiofemoral joint
- Extend the coxal joint
- Assist to medially rotate the coxal joint
- Bilaterally: tilt the pelvis posteriorly
Semitendinosus - Origin
Ischial tuberosity
Semitendinosus - Insertion
Proximal, medial shaft of the tibia at the pes anserinus tendon
Semitendinosus - Actions
- Flex the tibiofemoral joint
- Medially rotate the flexed tibiofemoral joint
- Extend the coxal joint
- Assist to medially rotate the coxal joint
- Bilaterally: tilt the pelvis posteriorly
Semitendinosus - Innervation
Sciatic nerve ( tibial branch )
Rectus Femoris - Origin
Anterior inferior iliac spine (AIIS)
Rectus Femoris - Insertion
Tibial tuberosity via the patella and patellar ligament
Rectus Femoris - Actions
- Extends the tibiofemoral joint
- Flexes the coxal joint
Rectus Femoris - Innervation
Femoral nerve
Biceps Femoris - Innervation
Sciatic nerve
- Long head (tibial branch)
- Short head (fibular branch)
Biceps Femoris - Origin
Long head: Ischial tuberosity
Short head: lateral lip of the linea aspera
Biceps Femoris - Insertion
Head of the fibula
Biceps Femoris - Actions
- Flex the tibiofemoral joint
- Laterally rotate the flexed tibiofemoral joint
Long Head: Extend the coxal joint and assist to laterally rotate the coxal joint
Bilaterally: tilt the pelvis posteriorly
Vastus Group - Actions
Extend the tibiofemoral joint