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Trunk muscle orgins

Anatomy Trunk Muscle's Orgins

QuestionAnswer
Splenius inferior half of nuchal ligament, spinous processes T1-T6
erector spinae spinous processes of sacral and lumbar vertebrae, iliac crest, and posterior sacrum
semispinalis transverse processes of cervical and thoracic vertebrae
multifidus transverse process of sacral, lumbar, thoracic, and cervical vertebrae
internal intercostal muscles 11 pairs of muscles filling the space between ribs, with fibers running in the same direction as the internal obliques
external intercostal muscles 11 pairs of muscles filling the space between ribs, with fibers running in the same direction as the external obliques
transversus thoracis posterior surface of the sternum
rectus abdominis pubic bone
external obliques lower 8 ribs
internal obliques thoracolumbar fascia, iliac crest, inguinal ligament
transversus abdominis lower 8 ribs, thoracolumbar fascia, inguinal ligament, and iliac crest
quadratus lumborum iliac crest
levator ani medial surface of pelvis, from pubis to ischial spine
diaphragm inferior border of rib cage, costal cartilages of ribs 6-12, and lumbar vertebrae
transverse perineus medial surface of ischial rami, and inferior pubic rami
external urethral sphincter loops around urethra and vagina (females) and around membranous urethra in male
external anal sphincter attached anteriorly to central tendon, posteriorly to coccyx; loops around and attaches to anal canal.
Created by: 805023886