Pelvis, Hip and Thigh Muscles Flashcards
Action of Adductor Longus
Adducts thigh
Action of Adductor Brevis
Adducts thigh and aids with flexion
Action of Adductor Magnus
Adducts thigh, Adductor Portion flexes thigh, Hamstring Portion extends thigh
Action of Biceps Femoris
Flexes and laterally rotates leg; Long Head of BF extends thigh
Action of Gemellus Inferior
Abducts and laterally rotates femur, stabilizes femoral head
Action of Gemellus Superior
Abducts and laterally rotates femur, stabilizes femoral head
Action of Gluteus Maximus
Hip extension, external rotation
Action of Gluteus Medius
Abducts and medially rotates femur, stabilize pelvis
Action of Gluteus Minimus
Abducts and medially rotates femur, stabilizes pelvis
Action of Gracilis
Adducts thigh, flexes leg, and helps to rotate it medially
Action of Iliacus
Flexes thigh, stabilizes hip joint, acts with psoas major
Action of Obturator Externus
Laterally rotates thigh, steadies head of femur in acetabulum
Action of Obturator Internus
Abducts and laterally rotates femur, stabilizes femoral head
Action of Pectineus
Adducts and flexes thigh
Action of Psoas Major
Flexes thigh, acting superiorly- lateral flexion of trunk, balances trunk
Action of Quadratus Femoris
Laterally rotates femur, stabilizes femoral head
Action of Sartorius
Flexes, abducts, and laterally rotates thigh
Action of Rectus Femoris
Flexes hip, extends knee
Action of Semimembranosus
Extend thigh, flex and medially rotate leg
Action of Semitendinosus
Extend thigh, flexes and medially rotates leg
Action of Tensor Fascia Latae
Abducts, medially rotates, flexes thigh, helps keep knee extended
Action of Vastus Intermedius
Extends knee
Action of Vastus Lateralis
Extends knee
Action of Vastus Medialis
Extends knee
Innervation Gluteus Medius
Superior gluteal nerve (L5, S1)
Innervation of Adductor Brevis
Obturator nerve, anterior branches of L2, L3, L4
Innervation of Adductor Longus
Obturator nerve, Anterior branch (L2, L3, L4)
Innervation of Adductor Magnus
Adductor portion is innervated by obturator nerve (L2, L3, L4) Hamstring portion is innervated by tibial nerve (L4)
Innervation of Gemellus Inferior
Nerve to quadratus femoris (L5, S1)
Innervation of Biceps Femoris
Long Head: Tibial Nerve (L5, S1, S2), Short Head: Common peroneal (L5, S1, S2)
Innervation of Gluteus Maximus
Inferior gluteal nerve (L5, S1, S2)
Innervation of Gemellus Superior
Nerve to Obturator Internus (L5, S1)
Innervation of Gluteus Minimus
Superior gluteal nerve (L5, S1)
Innervation of Iliacus
Femoral Nerve (L2-L4)
Innervation of Gracilis
Obturator nerve (L2, L3)
Innervation of Obturator Externus
Obturator nerve (L3, L4)
Innervation of Obturator Internus
Nerve to Obturator Internus (L5, S1)
Innervation of Pectineus
Femoral nerve (L2, L3) may receive branches of obturator nerve
Action of Piriformis
Abducts and laterally rotates femur, stabilizes femoral head
Innervation of Piriformis
Branches of anterior rami of S1 and S2