KIN427 Lecture Notes - Lecture 4: Quadratus Lumborum Muscle, List Of Students At South Park Elementary, Muscle Spindle

• School: University of Waterloo
• Department: Kinesiology
• Course: KIN427
• Professor: Stuart Mc Gill

Document Summary

With injury nerves grow in the discs. Specific lumbar roots serves different parts of the body. Innervation changes with injury particulary to the disc. Discs once past outer periphery are avascular (until damaged) Vertebral body is bloody, and disc has no blood at all. Veins and arteries enter and exit through the sinus at the back of vertebral body. Underneath endplate is a placenta (membrane which nutrition and metabolites are taken up) This placenta can be damaged (ie. ppl who have small compression fractures) Just like nerves sprouting vascular structures also grow into the disc if damaged (therefore more painful if damaged) vertebral veins: these veins have no valves. Pressure fluctuates with iap, itp both transmitted to cns fluid. What"s the shock absorber of the spine are not disc (incompressible fluid and therefore the placenta bulges into the vertebral body and it is the trabecular bone that acts as a spring to absorb the shock)