Spinal Flexion Flashcards
Rectus abdominus (origin)
pubic symphysis & pubic crest
Rectus abdominus (insertion)
xiphoid process, costal cartilages 5-7
Rectus abdominus (action)
flexes trunk, compression of abdominal viscera
Rectus abdominus (innervation)
ventral rami
Rectus abdominus (blood supply)
superior/inferior epigastric arteries
Internal oblique (origin)
thoracolumbar fascia, anterior 2/3 of iliac crest, lateral half of inguinal ligament
Internal oblique (insertion)
inferior borders of ribs 10-12
Internal oblique (action)
compresses and supports abdominal viscera, flexes and rotates trunk
Internal oblique (innervation)
ventral rami & 1st lumbar nerve
Internal oblique (blood supply)
superior/inferior epigastric arteries and deep iliac circumflex arteries
External oblique (origin)
external surfaces of ribs 5-12
External oblique (insertion)
linea alba, pubic tubercle, anterior 1/2 of iliac crest
External oblique (action)
flexes and rotates trunk
External oblique (innervation)
ventral rami
External oblique (blood supply)
superior/inferior epigastric arteries
Psoas major (origin)
bodies and transverse process of lumbar vertebrae (L1-L5)
Psoas major (insertion)
lesser trochanter of femur
Psoas major (action)
hip flexion, hip hike
Psoas major (innervation)
lumbar nerves 2-4
Psoas major (blood supply)
iliolumbar artery
Psoas minor (origin)
vertebral margins of T12 - L1 vertebrae and their corresponding intervertebral discs
Psoas minor (insertion)
pectineal line on superior ramus of pubis
Psoas minor (action)
flexes pelvis on vertebral column (posterior pelvic tilt)
Psoas minor (innervation)
ventral rami
Psoas minor (blood supply)
lumbar branches of iliolumbar artery
