Health Sciences 2300A/B Lecture Notes - Lecture 10: Abdominal External Oblique Muscle, Abdomen, Intercostal Muscle

• School: Western University
• Department: Health Sciences
• Course: Health Sciences 2300A/B
• Professor: Gillian Corbo

Document Summary

Run at right angles to each other which dictates their function: external oblique, internal oblique, transversus abdominis. Internal oblique: external oblique, aponeurosis of the external oblique, linea alba, tendinous intersection, rectus abdominis. Inguinal ligament thickened ligament formed by inferior edge of the abdominal aponeurosis. Helps form a canal for the spermatic cord. Internal oblique: thoracolumbar fascia mass of tissue in lower back, right external oblique cause contralateral rotation, internal oblique cause ipsilateral. Ipsilateral rotation lateral flexion of the trunk (bend to right move to right) movement: work together to cause rotational movement. Transversus abdominis: similar to a corset, wraps around entire abdomen, and holds everything in, squeezes everything in. Rectus abdominis: we aren"t actively trying to flex the vertebral column, primarily prevents hyperextension works eccentrically. Aponeurosis & rectus sheath: rectus abdominis covered anteriorly and posteriorly by rectus sheath, formed from 3 horizontal/oblique muscles that insert into linea alba via. Internal oblique passes on the posterior and anterior aspect of ra.