Sciatica And Lumbar Disc Herniation, causes and treatment

Join this channel to support the channel https://www.youtube.com/channel/UCOHfqHMhHvfQCYJDXfpSAiw/join What is sciatica? It is compression of the roots of the sciatic nerve, as in disc herniation, or compression of the sciatic nerve itself, as in piriformis syndrome. This will cause pain in the lower back and buttock, with sharp, shooting pain radiating down the leg to the foot, often associated with numbness, tingling, or burning, usually on one side. The pain worsens with sitting and improves with standing. Sciatica is often self-diagnosed and usually improves over time. The diagnosis is typically confirmed by the tension sign or straight leg raising test, in which elevating the leg between 30° and 70° reproduces paresthesia and leg pain (not back pain), because the sciatic nerve is being stretched. When the patient has a positive straight leg raising test, it indicates that the patient may benefit from surgery. At least six weeks of conservative treatment should be attempted before surgery. Surgery yields good outcomes if the patient has leg pain, a positive straight leg raise, neurological deficits, and neurological findings that correspond with the MRI. Quizzes 1. What is the primary cause of sciatica in most patients? A) Compression of the femoral nerve B) Lumbosacral nerve root compression from lumbar disc herniation C) Compression of the obturator nerve D) Sacroiliac joint dysfunction Answer: B) Lumbosacral nerve root compression from lumbar disc herniation Explanation: Sciatica is radicular pain from compression of L4–S1 nerve roots, most commonly due to lumbar disc herniation compressing the root in the lateral recess or foramen; the disc does not compress the sciatic nerve trunk. 2. Which symptom best characterizes sciatica? A) Pain limited to the lumbar spine B) Sharp, shooting pain radiating from the buttock down the leg to the foot C) Groin pain worsened by hip rotation D) Bilateral stocking distribution numbness Answer: B) Sharp, shooting pain radiating from the buttock down the leg to the foot Explanation: Radicular leg pain in a dermatomal pattern, often to the foot, is typical of nerve root compression; isolated back pain or symmetric stocking neuropathy suggests other diagnoses. 3. The straight leg raising test is considered positive when: A) Elevating the leg causes isolated low back pain at any angle B) Elevating the relaxed, extended leg between 30° and 70° reproduces dermatomal leg pain and paresthesia C) Elevating the leg beyond 90° causes hamstring tightness D) Hip flexion with knee flexion reduces pain Answer: B) Elevating the relaxed, extended leg between 30° and 70° reproduces dermatomal leg pain and paresthesia Explanation: This range tensions the lumbosacral nerve roots; reproduction of radicular leg pain, not isolated back pain, supports lumbar radiculopathy. 4. Which factor predicts a favorable surgical outcome in lumbar radiculopathy? A) Predominant back pain without leg pain B) Predominant leg pain with a positive straight leg raise C) Pain only during prolonged standing D) Normal neurological examination Answer: B) Predominant leg pain with a positive straight leg raise Explanation: Leg-dominant pain with positive straight leg raise and MRI finding of root compression predicts better outcomes after discectomy. 5. How long is conservative treatment usually attempted before surgery when there is no progressive deficit or cauda equina syndrome? A) 1 week B) 2 weeks C) 6 weeks D) 6 months Answer: C) 6 weeks Explanation: Most patients improve over several weeks; surgery is generally considered after at least six weeks of appropriate nonoperative care unless red flags mandate earlier intervention. 6. How does sciatica typically progress over time? A) It usually requires immediate surgery in all cases B) It is often self-diagnosed and usually improves with time C) It always leads to permanent neurological deficit D) It never improves without medication Answer: B) It is often self-diagnosed and usually improves with time Explanation: Sciatica is commonly self-diagnosed and in many cases improves gradually without the need for surgery.