Health Sciences 2300A/B Lecture Notes - Lecture 10: Thoracolumbar Fascia, Inguinal Ligament, Abdominal External Oblique Muscle
9 Feb 2018
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Document Summary
Intra-abdominal pressure pressure that exists within your abdomen. Forcing exhalation, but the air isn"t leaving our system. Increasing intra-abdominal pressure helps to stabilize the spine. External/internal abdominis start out as the same sheet of muscle as the intercostal muscles. Run at right angles to each other which dictates their function. Abdominal aponeurosis a flattened tendon that replaces a normal tendon and flattens out attachment point for muscles. Unilateral contraction results in contralateral rotation lateral side flexion. Bilateral contraction cancel out rotation and side bending flexion of the trunk. Inguinal ligament thickened ligament formed by inferior edge of the abdominal aponeurosis. Helps form a canal for the spermatic cord. Thoracolumbar fascia mass of tissue in lower back. Ipsilateral rotation lateral flexion of the trunk (bend to right move to right) Right external oblique cause contralateral rotation, internal oblique cause ipsilateral movement. Similar to a corset, wraps around entire abdomen, and holds everything in.
