Anterior and Medial Thigh Muscles Flashcards
Psoas Major
Origin
-Sides of T12-L5 vertebrae and intervertebral discs;
transverse processes of all lumbar vertebrae
Psoas Major
Insertion
-Lesser trochanter of femur
Psoas Major
Innervation
-Anterior rami of lumbar nerves (L1, L2, L3)
Psoas Major
Action
- Stabilizes hip joint
- Flexes hip
Psoas Minor
Origin
-Sides of T12-L1 vertebrae and intervertebral discs
Psoas Minor
Insertion
-Pectineal line and iliopectineal eminence of
pelvic bone
Psoas Minor
Innervation
-Anterior rami of lumbar nerves (L1, L2)
Psoas Minor
Action
-Weakly flexes lumbar spine
Iliacus
Origin
- Iliac crest; iliac fossa;
- ala of the sacrum;
- anterior sacroiliac ligaments
Iliacus
Insertion
-Tendon of psoas major; lesser trochanter and femur distal to it
Iliacus
Innervation
-Femoral nerve (L2, L3)
Iliacus
Action
- Flexes hip
- Stabilizes hip joint
Sartorius
Origin
-Anterior superior iliac spine (ASIS)
Sartorius
Insertion
-Superior and medial surface of tibia (pes anserine)
Sartorius
Innervation
-Femoral nerve (L2, L3)
Sartorius
Action
- Flexes, abducts, and laterally rotates hip
- Flexes knee joint
- Medially rotates tibia when knee flexed
Rectus Femoris
Origin
-Anterior inferior iliac spine (AIIS) and ilium superior
to acetabulum
Rectus Femoris
Insertion
- To patella via quadriceps tendons
- indirectly via patellar ligament to tibial tuberosity
Rectus Femoris
Innervation
-Femoral nerve (L2, L3, L4)
Rectus Femoris
Action
- Extends knee joint
- Steadies hip joint
- Helps iliopsoas flex hip
Vastus Lateralis
Origin
-Greater trochanter and lateral lip of linea aspera of
femur
Vastus Lateralis
Insertion
-To patella via quadriceps
tendons
-indirectly via patellar ligament to tibialtuberosity
Vastus Lateralis
Innervation
-Femoral nerve (L2, L3, L4)
Vastus Lateralis
Action
-Extends knee joint
Vastus Medialis
Origin
-Intertrochanteric line and the medial lip of linea aspera of femur
Vastus Medialis
Insertion
- To patella via quadriceps tendons
- indirectly via patellar ligament to tibial tuberosity
Vastus Medialis
Innervation
-Femoral nerve (L2, L3, L4)
Vastus Medialis
Action
-Extends knee joint
Vastus Intermedius
Origin
-Anterior and lateral surfaces of shaft of femur
Vastus Intermedius
Insertion
- To patella via quadriceps tendons
- indirectly via patellar ligament to tibial tuberosity
Vastus Intermedius
Innervaiton
-Femoral nerve (L2, L3, L4)
Vastus Intermedius
Action
-Extends knee joint
Pectineus
Origin
-Superior ramus of pubis
Pectineus
Insertion
-Pectineal line of femur
Pectineus
Innervation
- Femoral nerve (L2, L3)
- may receive branch fromthe obturator nerve
Pectineus
Action
-Adducts, flexes, medially rotates hip joint
Tensor Fascia Latae
Origin
-Anterior superior iliac spine (ASIS); anterior part
of iliac crest
Tensor Fascia Latae
Insertion
-Iliotibial tract, which attaches to lateral condyle
of tibia
Tensor Fascia Latae
Innervation
-Superior gluteal nerve (L5, S1)
Tensor Fascia Latae
Action
-Abducts and medially rotates hip joint
Adductor Longus
Origin
-Body of pubis inferior to pubic crest
Adductor Longus
Insertion
-Middle third of linea aspera of femur
Adductor Longus
Innervation
-Obturator nerve, branch of the anterior division (L2,
L3, L4)
Adductor Longus
Action
-Adducts hip joint
Adductor Brevis
Origin
-Body and inferior ramus of pubis
Adductor Brevis
Insertion
-Pectineal line and proximal part of linea aspera
Adductor Brevis
Innervation
-Obturator nerve, branch of the anterior division (L2,
L3, L4)
Adductor Brevis
Action
-Adducts and weakly flexes hip joint
Adductor Mangus
Origin
-Adductor part: inferior ramus of pubis and ramus
of ishium
-Hamstrings part: ischialtuberosity
Adductor Mangus
Insertion
-Adductor part: gluteal tuberosity, linea aspera,
and medial supracondylar line of femur
-Hamstring part: adductor tubercle of femur
Adductor Mangus
Innervation
-Adductor part: obturator nerve (L2, L3, L4),
branches of posterior division
-Hamstring part: tibial division of sciatic nerve (L4)
Adductor Mangus
Action
- Adducts hip joint
- Adductor part flexes hip
- Hamstring part extends hip
Gracilis
Origin
-Body and inferior ramus of pubis
Gracilis
Insertion
-Superior and medial surface of tibia (pes anserine)
Gracilis
Innervation
-Obturator nerve (L2, L3)
Gracilis
Action
- Adducts hip joint
- Flexes knee joint
- Medially rotates tibia
Obturator Externus
Origin
-Anterior surface of obturator membrane and
surrounding bones
Obturator Externus
Insertion
-Trochanteric fossa of femur
Obturator Externus
Innervation
-Obturator nerve (L3, L4)
Obturator Externus
Action
- Laterally rotates hip
- Steadies head of femur in acetabulum