Health Sciences 2300A/B Lecture Notes - Lecture 6: Transverse Abdominal Muscle, Thoracolumbar Fascia, Anterior Ramus Of Spinal Nerve

• School: Western University
• Department: Health Sciences
• Course: Health Sciences 2300A/B
• Professor: Jamie Melling

Document Summary

Identifying muscular compartments: vertebral muscles, abdominal muscles, breathing muscles, perineum and pelvic diaphragm muscles, within each compartment, identify its muscular attachments, common nerve supply and muscular function. Properly termed the erector spinae because they keep the spine erect. True muscles of the back keep the spine erect; truly dedicated to the spine. 2 functions: extends the trunk (keeping spine erect, maintains posture + balance. When standing in upright position, these muscles are in a relaxed state because they do not need to work when you stand upright since all vertebrae align nicely on top of one another. When we bend or move (changing normal order of the spine), these muscles work to maintain proper balance and movement of the spine, hence they can be damaged during movement. Similar function with other skeletal muscles but different innervation. Consists of 3 muscles (i like standing): iliocostalis. Attaches the ilium and the ribs: longissimus.