Image from http://droualb.faculty.mjc.edu/Lecture%20Notes/Unit%203/Muscles_that_move_the_femur.jpg.
Piriformis Syndrome Piriformus syndrome is a condition that causes the sciatic nerve to be irritated or compressed by the piriformis muscl...
When a patient feels pain due to a herniated disc, the pain is not from the disc itself, rather it's from the disc protruding onto a nerve: http://www.spine-health.com/conditions/herniated-disc/whats-a-herniated-disc-pinched-nerve-bulging-disc
Vertebral disc problems
Preventing ACL Injury through Strengthening Exercises