Abdominal Muscles Flashcards
What is the origin of the Rectus Abdominis?
Pubic symphysis of the pelvis
What is the insertion of the Rectus Abdominis?
Ribs 5-7
What innervates the Rectus Abdominis?
Intercostal nerve T7–T12
What is the origin of the External Oblique?
External surface of ribs 4–12
What is the insertion of the External Oblique?
Anterior iliac crest of the pelvis, linea alba, and contralateral rectus sheaths
What innervates the External Oblique?
Intercostal nerves (T8–T12), iliohypogastric (L1), and ilioinguinal (L1)
What is the origin of the Internal Oblique?
Anterior two-thirds of the iliac crest of the pelvis and thoracolumbar fascia
What is the insertion of the Internal Oblique?
Ribs 9–12, linea alba, and contralateral rectus sheaths
What innervates the Internal Oblique?
Intercostal nerves (T8–T12), iliohypogastric (L1), and ilioinguinal (L1)
What is the origin of the Transverse Abdominis?
Ribs 7–12, anterior two-thirds of the iliac crest of the pelvis, and thoracolumbar fascia
What is the insertion of the Transverse Abdominis?
Linea alba and contralateral rectus sheaths
What innervates the Transverse Abdominis?
Intercostal nerves (T7–T12), iliohypogastric (L1), and ilioinguinal (L1)
What is the origin of the Diaphragm?
Ribs 6-12, Posterior side of xiphoid process, quadratus lumborum, psoas major
What is the insertion of the Diaphragm?
Central Tendon
What innervates the Diaphragm?
Phrenic Nerve