Straight Leg Raise Test: This test is used to evaluate nerve root and sciatic nerve function. The patient is instructed to lie flat on the back, then lift one leg at a time to a 90-degree angle, with the knee locked and the toes pointing towards the ceiling. The test is then repeated with the leg bent at the knee (but still at a 90-degree angle). The doctor looks for signs of pain, numbness, or tingling sensation in the lower