Muscles Flashcards
Psoas Major M. (Illiopsoas M)
Origin, Insertion, Action
O: Lateral portion of the centra/bodies of T12- L5
I: Lesser trochanter of the femur (medially under the head of femur)
A: Laterally flex vertebral column, balances and flexes the thigh when acting with illacus ***CHIEF FLEXOR OF THIGH
Psoas Major M.
Innervation and Arterial supply
Lumbar Plexus L1-L3
Illiolumbar artery from common illiac artery
Illiacus M. (Illiopsoas M)
Origin, Insertion, Action
O: Superior illiac fossa, ala of sacrum
I: Lesser trochanter
A: Chief flexor of hip, stabilizes hip joint
Illiacus M.
Innervation and Arterial supply
Femoral N.
Medial femoral circumflex a. and iliolumbar a.
Psoas Minor
Origin, Insertion, Action
I: Lesser Trochanter
A: Flexor of thigh
Psoas Minor
Innervation
L1-L2 Ventral Rami
Sartorius M.
Origin, Insertion, Action
O: ASIS
I: pes anserine
A: Flex, abduct, laterally rotate thigh
Sartorius M.
Innvervation and blood supply
Femoral Nerve
Femoral A
Rectus Femoris M.
Origin, Insertion, Action
O: AIIS
I: Tibial Tuberosity
A: Rectus extends leg and flexes thigh
Rectus Femoris M.
Innvervation and blood supply
Femoral Nerve
Lateral femoral circumflex a.
Vastus Lateralis M.
Origin, Insertion, Action
O: shaft of femur
I: Lateral aspect base of patella, tibial tuberosity
A: Extends leg
Vastus Lateralis M.
Innervation and blood supply
Femoral N
Femoral A
Nerve roots to know
Femoral Nerve (L2- L4) Obturator Nerve (L2- L4) Sciatic Nerve (L4-S3) -Tibial Nerve L4-S3 - Common Fibular Nerve- L4-S2
Vastus medialis M.
Origin, Insertion, Action
O: Interrochanteric line and medial lip of linea aspera I: Common quadriceps tendon and to medial patellar retinacula A:Extends leg at knee joint
Vastus Medialis M
Innervation and blood supply
Femoral N.
Femoral A.
Vastus Intermedius M.
Origin, Insertion, Action
O: Anterior and lateral
surfaces of femur shaft
I: Common quadriceps tendon
A: Extends leg at knee cap
Vastus Intermedius M.
Innervation and blood supply
Femoral N.
Femoral A.
Pectineus M.
Origin, Insertion, Action
O: Superior Ramus of pubis
I: Pectineal line of femur, just inferior to lesser trochanter
A: Adducts and flexes thigh and assists with medial rotation of thigh.
Pectineus M
Innervation and blood supply
Femoral n. ( L2 , L3)
Obturator A.
Adductor Longus M.
Origin, Insertion, Action
O: Body of pubis inferior to pubic crest
I: Middle 3rd of linea aspera
A: Adducts and flexes thigh
Adductor Longus M.
Innervation and blood supply
Obturator Nerve (L2-L4) Deep Femoral A.
Adductor brevis M.
Origin, Insertion, Action
O: Pubis body and inferior ramus
I: Proximal linea aspera
A: Adducts and flexes thigh
Adductor brevis M.
Innervation and blood supply
Obturator N.
Deep Femoral A.
Gracilis M.
Origin, Insertion, Action
O: Pubis body and inferior ramus I: Superior part of medial surface of tibia (part of pes anserinus) A: Adducts thigh Flex and medially rotates leg **only adductor to cross knee joint
