Lower Limb Muscles Flashcards
Describe the origins (o), insertions (I), actions (a), and innervations (I) of the Gluteus Maximus.
O: posterior surface of the sacrum and ilium and posterior to the posterior gluteal line
I: gluteal tuberosity and iliotibial tract
A: extends hip and laterally rotates hip
I: inferior gluteal nerve
Describe the origins (o), insertions (I), actions (a), and innervations (I) of the Gluteus Medius.
O: between the posterior and anterior gluteal lines
I: lateral surface of the greater trochanter
A: abducts hip and medially rotates hip
I: superior gluteal nerve
Describe the origins (o), insertions (I), actions (a), and innervations (I) of the Gluteus Minimus.
O: between the anterior and inferior gluteal line
I: lateral surface of the greater trochanter
A: abducts hip and medially rotates hip
I: superior gluteal nerve
Describe the origins (o), insertions (I), actions (a), and innervations (I) of the Tensor Fasciae Latae.
O: anterior portion of the iliac crest
I: iliotibial tract
A: flexes hip, abducts hip and medially rotates hip
I: superior gluteal line
Describe the origins (o), insertions (I), actions (a), and innervations (I) of the Piriformis.
O: anterior sacrum
I: superior surface of the greater trochanter
A: laterally rotates hip
I: S1-S2 spinal nerves
Describe the origins (o), insertions (I), actions (a), and innervations (I) of the Obturator Internus.
O: deep (inner) surface of the ischial and pubic rami and obturator membrane
I: medial surface of the greater trochanter
A: laterally rotates hip
I: nerve obturator internus
Describe the origins (o), insertions (I), actions (a), and innervations (I) of the Obturator Externus.
O: superficial (outer) surface of the ischial and pubic rami and obturator membrane
I: medial surface of the greater trochanter
A: laterally rotates hip
I: obturator nerve
Describe the origins (o), insertions (I), actions (a), and innervations (I) of the Quadratus Femoris.
O: ischial tuberosity
I: intertrochanteric crest
A: laterally rotates hip
I: nerve to quadratus
Describe the origins (o), insertions (I), actions (a), and innervations (I) of the Superior Gemellus.
O: ischial spine
I: medial surface of the greater trochanter
A: laterally rotates hip
I: nerve to obturator internus
Describe the origins (o), insertions (I), actions (a), and innervations (I) of the Inferior Gemellus.
O: ischial tuberosity
I: medial surface of the greater trochanter
A: laterally rotates hip
I: nerve to quadratus femoris
Describe the origins (o), insertions (I), actions (a), and innervations (I) of the Iliopsoas.
O: psoas major, bodies and TVPs of the lumbar vertebrae, iliacus, iliac fossa
I: lesser trochanter
A: flexes hip, laterally rotates hip
I: femoral nerve & L2-L3 spinal nerves
Describe the origins (o), insertions (I), actions (a), and innervations (I) of the Sartorius.
O: ASIS
I: Pes anserinus
A: flexes hip, laterally rotates hip, abducts hip and flexes knee
I: femoral nerve
Describe the origins (o), insertions (I), actions (a), and innervations (I) of the Rectus Femoris.
O: AIIS
I: tibial tuberosity
A: flexes hip and extends knee
I: femoral nerve
Describe the origins (o), insertions (I), actions (a), and innervations (I) of the Vastus Lateralis.
O: lateral edge of linea aspera
I: tibial tuberosity
A: extends knee
I: femoral nerve
Describe the origins (o), insertions (I), actions (a), and innervations (I) of the Vastus Intermedius.
O: anterior surface of the body of the femur
I: tibial tuberosity
A: extends knee
I: femoral nerve
Describe the origins (o), insertions (I), actions (a), and innervations (I) of the Vastus Medialis.
O: medial edge of the linea aspera
I: tibial tuberosity
A: extends knee
I: femoral nerve
Describe the origins (o), insertions (I), actions (a), and innervations (I) of the Biceps Femoris.
O: long head - ischial tuberosity | short head - linea aspera
I: posterior surface of the lateral condyle of tibia and head of the fibula
A: extends hip and flexes knee
I: sciatic nerve
Describe the origins (o), insertions (I), actions (a), and innervations (I) of the Semitendinosus.
O: ischial tuberosity
I: pes anserinus
A: extends hip and flexes knee
I: sciatica nerve
Describe the origins (o), insertions (I), actions (a), and innervations (I) of the Semimembranosus.
O: ischial tuberosity
I: posterior surface of the medial condyle of the tibia
A: extends hip and flexes knee
I: sciatica nerve
Describe the origins (o), insertions (I), actions (a), and innervations (I) of the Pectineus.
O: superior ramus of the pubis
I: posterior surface of the femur distal to the lesser trochanter
A: adducts and flexes hip
I: femoral nerve
Describe the origins (o), insertions (I), actions (a), and innervations (I) of the Adductor Longus.
O: superior ramus of the pubis
I: distal portion of the linea aspera
A: adducts hip and flexes hip
I: obturator nerve
Describe the origins (o), insertions (I), actions (a), and innervations (I) of the Adductor Magnus.
O: adductor - inferior ramus of the pubis | hamstring - ischial tuberosity
I: adductor - linea aspera | hamstring - adductor tubercle
A: both - adducts hip | adductor - flexes hip | hamstring - extends hip
I: adductor - obturator nerve | hamstring - sciatica nerve
Describe the origins (o), insertions (I), actions (a), and innervations (I) of the Adductor Brevis.
O: inferior ramus of the pubis
I: proximal portion of the linea aspera
A: adducts the hip and flexes the hip
I: obturator nerve
Describe the origins (o), insertions (I), actions (a), and innervations (I) of the Gracilis.
O: inferior ramus of the pubis
I: pes anserinus
A: adducts hip, flexes hip, medially rotates hip, and flexes knee
I: obturator nerve
