Trunk Muscles Flashcards
Psoas major proximal attatchments
Sides of T12-L5 vertebrae and discs between them
TP L1-L5
Psoas major distal attatchments
Lesser trochanter of femur
Psoas major distal attatchments
Lesser trochanter of femur
Psoas major innervation
Anterior rami L1,L2,L3
Psoas major MA
With the origin fixed
Hip flexion
Hip lateral rotation( ER)
With the insertion fixed
Trunk flexion toward the thigh
Pelvic anterior tilt
Psoas major only
Stabilizes Hip joint when standing
Illiacus proximal attatchments
Illiac fossa
Sacrum
Anterior sacroilliac ligaments
Illiacus distal attatchments
Lesser trochanter of the femur
Psoas tendon
Illiacus nerve innervation
Femoral nerve
L2,L3,L4
Quadratis lumborum proximal attatchments
12th ribs and tips of lumbar transverse processes
Quadratus lumborum distal attatchments
Illiolumbar ligament and illiac crest
Quadratus lumborum innervation
Ventral branches of T12,L1 to L4
Quadratus Lumborum muscular action
Unilaterally
Laterally tilt/hike/elevate the pelvis
Laterally flex the vertebral column to the same side
Extend the vertebral column
Bilaterally
Fix the last rib during forced inspiration
Diaphragm origin
Costal attatchments
Inner surface of lower six ribs
Lumbar attatchments
Upper 2 or 3 lumbar vertebrae
Sternal attatchments
Inner part of xiphoid process
Diaphragm insertion
Central tendon
Diaphragm innervation
Phrenic nerve
C3-C5
Rectus abdominis muscular action
Flex the vertebral column
Compresses abdominal viscera
Tilt pelvis posteriorly
Rectus abdominis innervation
Thoraco abdominal nerve
(anterior rami of T6-T12)
External oblique innervation
Thoraco abdominal nerves
T7 to T11 and subcostal
Internal oblique innervation
Thoraco abdominal nerve
T6-T12 Nad first lumbar nerve
Transverse abdominis innervation
Thoraco abdominal nerves T6-T12
spinal and first lumbar nerve
Transverse abdominis muscular action
Compresses and support abdominal viscera
Antagonist of diaphragm with expiration
What muscles of the pelvic floor make up the superficial layer
Ischiocavernosus
Bulbospongiosus
Superficial transverse perineal
External anal sphincter
What muscles make up the intermediate layer of the pelvic floor ?
External urethral sphincter
Deep transverse perineal
Compressor urethrae (Female)
Sphincter urethrovaginalis(female)
What muscles make up the deep pelvic floor?
Levator Ani
Coccygeus
Obturator internus
Piriformis
What are the three muscles that make up the levator Ani
Puborectalis, pubococcygeus, ilecoccygeous
