APA 1313 Study Guide - Midterm Guide: Iliolumbar Ligament, Abdomen, Decussation

• School: University of Ottawa
• Department: Human Kinetics
• Course: APA 1313
• Professor: Kim Yurkowski

Document Summary

Insertion: fibers run superomedially to occipital bone and spinous processes in thoracic and cervical regions, spanning 4-6 ligaments. Main action: extend head and thoracic and cervical regions of vertebral column and rotate them. Origin: arises from posterior aspects of sacrum and ilium, transverse processes of thoracic and lumbar vertebrae, and articular processes of the c4-c7. Insertion: fibers pass superomedially to spinous processes of vertebrae above, spanning 2-4 segments. Main action: stabilizes vertebrae during local movements of vertebral column. Insertion: pass superomedially to attach to the root of the spinous processes of the next one or two vertebrae superiorly, spanning 1-2 segments. Main action: stabilize vertebrae and assists with local extension and rotary movements of vertebral column. They aid in lateral bending, and stabilize vertebral column when acting bilaterally. Levatores costarum elevate ribs, assisting inspiration and lateral bending of vertebral column. Muscles in thoracic wall intercostal muscles (occupies the intercostal spaces) Inferior attachment superior border of ribs below.