Abdomen muscles Flashcards
What is the origin of the rectus abdominis?
pubic crest, pubic symphisis
What is the insertion of the rectus abdominis?
cartilage of ribs 5-7, xyphoid process
What is the action and reverse muscle action of the rectus abdominis?
flexion of vertebral column, compression of abdomen, flexion of pelvis on vertebral column (RMA)
What muscle originates from pubic crest, pubic symphysis and insert to cartilage of ribs 5-7 & xyphoid process?
rectus abdominis
What is the origin of the external oblique?
ribs 5-12
What is the insertion of the external oblique?
iliac crest, linea alba
What is the action of the external oblique?
bilaterally: flexion of vertebral column, compression of abdomen
unilaterally: lateral flexion and rotation of vertebral column
What muscle originates from ribs 5-12 and insert to iliac crest & linea alba?
external oblique
What is the origin of the internal oblique?
iliac crest, inguinal ligament, thoracolumbar fascia
What is the insertion of the internal oblique?
cartilage of ribs 7-10, linea alba
What is the action of the internal oblique?
bilaterally: flexion of vertebral column, compression of abdomen
unilaterally: lateral flexion and rotation of vertebral column
What muscle originates from iliac crest, inguinal ligament, thoracolumbar fascia and insert to cartilage of ribs 7-10 & linea alba?
internal oblique
What is the origin of transverse abdominis?
iliac crest, inguinal ligament, lumbar fascia, cartilages of ribs 5-10
What is the insertion of transverse abdominis?
xyphoid process, linea alba, pubis
What is the action of transverse abdominis?
compression of abdomen
What muscle originates from iliac crest, inguinal ligament, lumbar fascia, cartilages of ribs 5-10 and insert to xyphoid process, linea alba & pubis?
transverse abdominis
What is the origin of the quadratus lumborum?
iliac crest, iliolumbar ligament
What is the insertion of the quadratus lumborum?
inferior border of rib 12 and L1-L4
What is the action and reverse muscle action of the quadratus lumborum?
bilaterally: pulls 12th rib interiorly, fixes 12th rib to prevent elevation during deep inhalation, extension of lumbar portion of vertebral column
unilaterally: lateral flexion of vertebral column
RMA: elevation of hip bone
What muscle originates from iliac crest, iliolumbar ligament and insert to inferior border of rib 12 & L1-L4?
quadratus lumborum