Muscles Crossing The Hip And Knee Joint Flashcards
Insertion of iliacus
Lesser trochanter of femur via iliopsoas tendon
Origin of iliacus
Iliac fossa, ala of sacrum
Action of iliacus
Prime mover in thigh Flexion and in flexing trunk
Innervation of iliacus
Femoral nerve
Origin of psoas major
By fleshy strips from transverse processes, bodies, and discs of lumbar vertebrae and t12
Insertion of psoas major
Lesser trochanter of femur via iliopsoas tendon
Action of psoas major
Mover in thigh Flexion and flexing trunk; lateral Flexion of vertebral column
Innervation of psoas major
Ventral rami
Origin of tensor fasciae latae
Anterior aspect of iliac crest and anterior superior iliac spine
Insertion of tensor fasciae latae
Iliotibial tract
Action of tensor fasciae latae
Steadies trunk on thigh by making iliotibial track taut
Innervation of tensor fasciae latae
Superior gluteal nerve
Origin of sartorius
Anterior superior iliac spine
Insertion of sartorius
Winds around medial aspect of knee and inserts on medial aspect of proximal tibia
Action of sartorius
Flexes, abducts, and laterally rotates thigh; flexes leg
Innervation of sartorius
Femoral nerve
Origin of rectus femoris
Anterior inferior iliac spine and superior margin of acetabulum
Insertion of rectus femoris
Patella and tibial tuberosity via patellar ligament
Action of rectus femoris
Extends knee and flexes thigh at the hip
Innervation of rectus femoris
Femoral nerve
Origin of vastus lateralis
Greater trochanter, intertrochanteric line, linea aspera
Insertion of vastus lateralis
Patella and tibial tuberosity via patellar ligament
Action of vastus lateralis
Extends and stabilizes knee
Innervation of vastus lateralis
Femoral nerve
Origin of vastus medialis
Linea aspera, medial supracondylar line, intertrochanteric line
Insertion of vastus medialis
Patellar and tibial tuberosity via patellar ligament
Action of vastus medialis
Extends knee
Innervation of vastus medialis
Femoral nerve
Origin of vastus intermedius
Anterior and lateral surfaces of proximal femur shaft
Insertion of vastus intermedius
Patellar and tibial tuberosity via patellar ligament
Action of vastus intermedius
Extends knee
Innervation of vastus intermedius
Femoral nerve
Origin of pectineus
Pectineal line of pubis (and superior ramus)
Insertion of pectineus
Line from lesser trochanter to linea aspera on posterior aspect of femur
Action of pectineus
Adducts, flexes, and medially rotates thigh
Innervation of pectineus
Femoral and sometime obturator nerve
Origin of gracilis
Inferior ramus and body of pubis and adjacent ischial ramus
Insertion of gracilis
Medial surface of tibia just inferior to its medial condyle
Action of gracilis
Adducts thigh; flexes and medially rotates leg
Innervation of gracilis
Obturator nerve
Origin of adductor longus
Pubis near pubic symphysis
Insertion of adductor longus
Linea aspera
Action of adductor longus
Adducts, flexes, and medially rotates thigh
Innervation of adductor longus
Obturator nerve
Origin of adductor brevis
Body and inferior ramus of pubis
Insertion of adductor brevis
Linea aspera above adductor longus
Action of adductor brevis
Adducts and medially rotates thigh
Innervation of adductor brevis
Obturator nerve
Origin of adductor Magnus
Ischial and pubic rami and ischial tuberosity
Insertion of adductor Magnus
Linea aspera, medial supracondylar line, and adductor tubercle of femur
Action of adductor Magnus
Adducts and medially rotates and flexes thigh; thigh extension
Innervation of adductor Magnus
Obturator and sciatic nerve
Origin of gluteus Maximus
Dorsal ilium, sacrum, coccyx
Insertion of gluteus Maximus
Gluteal tuberosity of femur; iliotibial tract
Action of gluteus Maximus
Major extensor of thigh
Innervation of gluteus Maximus
Inferior gluteal nerve
Origin of gluteus medius
Between anterior and posterior gluteal lines on lateral surface of ilium
Insertion of gluteus medius
By short tendon into lateral aspect of greater trochanter of femur
Action of gluteus medius
Abducts and medially rotates thigh
Innervation of gluteus medius
Superior gluteal nerve
Origin of gluteus minimus
Between anterior and inferior gluteal lines on external surface of ilium
Insertion of gluteus minimus
Anterior border of greater trochanter of femur
Action of gluteus minimus
Abducts and medially rotates thigh
Innervation of gluteus minimus
Superior gluteal nerve
Origin of biceps femoris
Ischial tuberosity (long head); linea aspera, lateral supracondylar line, and distal femur (short head)
Insertion of biceps femoris
Common tendon passes downward and laterally to insert into head of fibula and lateral condyle of tibia
Action of biceps femoris
Extends thigh and flexes knee
Innervation of biceps femoris
Sciatic nerve: tibial nerve to long head, common fibular nerve to short head
Origin of semitendinosus
Ischial tuberosity
Insertion of semitendinosus
Medial aspect of upper tibial shaft
Action of semitendinosus
Extends thigh and flexes knee
Innervation of semitendinosus
Sciatic nerve-tibial portion
Origin of semimembranosus
Ischial tuberosity
Insertion of semimembranosus
Medial condyle of tibia; through oblique ligament of knee to lateral condyle of femur
Action of semimembranosus
Extends thigh and flexes knee
Innervation of semimembranosus
Sciatic nerve: tibial portion
Origin of piriformis
Anterolateral surface of sacrum
Insertion of piriformis
Superior border of greater trochanter of femur
Action of piriformis
Rotates extended thigh laterally
Innervation of piriformis
L4-S1
Origin of obturator externus
Outer surface of obturator membrane, external surface of pubis and ischium, and margins of obturator foramen
Insertion of obturator externus
By a tendon into trochanter if fossa of posterior femur
Action of obturator externus
Rotates extended thigh laterally
Innervation of obturator externus
Obturator nerve
Origin of obturator internus
Inner surface of obturator membrane, greater sciatic notch, and margins of obturator foramen
Insertion of obturator internus
Greater trochanter in front of piriformis
Action of obturator internus
Rotates extended thigh laterally
Innervation of obturator internus
L5 and S1
Origin of gemellus
Ischial spine (superior); ischial tuberosity (inferior)
Insertion of gemellus
Greater trochanter of femur
Action of gemellus
Rotates extended thigh laterally
Innervation of gemellus
L5 and S1
Origin of quadratus femoris
Ischial tuberosity
Insertion of quadratus femoris
Intertrochanteric crest of femur
Action of quadratus femoris
Rotates thigh laterally and stabilizes hip joint
Innervation of quadratus femoris
L5 and S1