Abdomen OIIA's Flashcards
Origin: External oblique
Outter surface of ribs 5-12
Insertion: External oblique
Linea alba, pubic crest, ASIS & iliac crest
Innervation: External oblique
Anterior rami of T7-L1
Action: External oblique
Rotates trunk to the opposite side & compress abdominal contents
Origin: Internal oblique
Thoracolumbar fascia, iliac crest, inguinal ligament
Insertion: Internal oblique
Lower margins of ribs 9-12, pubic crest, inguinal ligament
Innervation: Internal oblique
Anterior rami of T7-T12
Action: Internal oblique
Rotation to the same side & compresses abdominal contents
Origin: Transverse abdominis
Thoracolumbar fascia, iliac crest, inguinal ligament, costal cartilages of lower ribs
Insertion: Transverse abdominis
Linea alba, pubic crest, pectineal line
Innervation: Transverse abdominis
Anterior rami of T7 to T12 and L1
Action: Transverse abdominis
Compress abdominal contents
Origin: Rectus abdominis
Pubic crest, tubercle, and symphysis
Insertion: Rectus abdominis
Costal cartilages of ribs 5-7 & xiphoid process
Innervation: Rectus abdominis
Anterior rami of T7-T12
Action: Rectus abdominis
Flex vertebral column and compress abdominal wall
Origin: Pyramidalis
Front of pubis and pubic symphysis
Insertion: Pyramidalis
Linea alba
Innervation: Pyramidalis
Anterior ramus of T12
Action: Pyramidalis
Tenses linea alba
Origin: Psoas major
Bodies of T12-L5 vertebrae, and transverse processes of lumbar vertebrae
Insertion: Psoas major
Lesser trochanter of femur
Innervation: Psoas major
Anterior rami of L1-L3
Action: Psoas major
Hip flexion
Origin: Psoas minor
Bodies of T12-L1 vertebrae
Insertion: Psoas minor
Pectineal line of the pelvic brim & iliopubic eminence
Innervation: Psoas minor
Anterior rami of L1
Action: Psoas minor
-Hip flexion
-Helps w/ posterior pelvic tilt
Origin: Iliacus
Upper two thirds of iliac fossa
Insertion: Iliacus
Lesser trochanter of femur
Innervation: Iliacus
Femoral nerve (L2-L3)
Action: Iliacus
Hip flexion
Origin: Quadratus lumborum
Iliac crest and iliolumbar ligament
Insertion: Quadratus lumborum
Transverse processes of L1-L4 vertebrae and inferior border of rib 12
Innervation: Quadratus lumborum
Anterior rami of T12-L4
Action: Quadratus lumborum
Depresses and stabilizes rib 12 during respiration & lateral bending of trunk