Sciatica

Sciatica and Sciatic Nerve Pain

What is Sciatica?

Sciatica refers to pain that follows the course of the sciatic nerve, the longest and largest nerve in the human body. This nerve originates from the lower lumbar (L4-L5) and sacral (S1-S3) vertebrae, passes through the buttock, descends along the back of the thigh and continues to the foot.

Sciatic pain is most often mechanical in origin: it results from irritation or compression of the nerve at the level of the lumbar spine or pelvis. It may be associated with a disc herniation, posterior joint conflict, piriformis syndrome or muscular tension compressing the nerve pathway.

Symptoms of Sciatica

• Pain starting from the lower back or buttock, radiating down the back of the thigh
• Pain that may extend to the calf, ankle or foot
• Burning sensation, tingling or numbness along the nerve pathway
• Pain worsened by prolonged sitting, coughing or straining
• Difficulty standing up, walking or remaining on one's feet for extended periods
• In some cases, muscular weakness in the affected lower limb

Common Causes

• Lumbar disc herniation — the best-known cause, through direct compression of the nerve root
• Piriformis syndrome — compression of the sciatic nerve by the piriformis muscle in the buttock
• Facet joint arthritis — narrowing of the spinal canal or intervertebral foramen
• Pelvic imbalance — functional asymmetry altering mechanical stresses on the lumbar spine
• Muscular tension — tightness in the gluteal muscles, psoas or hamstrings creating indirect compression
• Pregnancy — postural changes and ligamentous laxity that may promote nerve irritation

Osteopathic Assessment

The clinical examination includes:

• Detailed history of onset, pain trajectory and medical background
• Neurological tests (straight leg raise, slump test, reflexes, sensation, muscle strength)
• Assessment of lumbar, pelvic and hip mobility
• Palpation of muscles along the sciatic pathway (piriformis, gluteals, hamstrings)
• Global postural evaluation

If the examination reveals warning signs (motor deficit, sphincter disturbance, uncontrolled severe pain), the patient is referred for medical opinion and imaging.

Osteopathic Approach to Sciatica

Osteopathy can contribute to the management of sciatica by addressing the mechanical factors of nerve compression or irritation:

• Mobilisation of lumbar vertebrae and sacrum to restore functional mobility
• Work on the piriformis muscle and gluteal muscles to free the nerve pathway
• Release of tension in the psoas, quadratus lumborum and hamstrings
• Rebalancing of the pelvis and sacroiliac joints
• Gentle or structural techniques adapted to the intensity of the pain

How Many Sessions?

For mechanically-driven sciatica, 2 to 4 sessions spaced 1 to 3 weeks apart generally produce significant improvement. Chronic or recurrent cases may require longer follow-up.

References

• Santilli V, Beghi E, Finucci S. (2006). Chiropractic manipulation in the treatment of acute back pain and sciatica with disc protrusion: a randomized double-blind clinical trial. The Spine Journal, 6(2):131-137. PMID 16517383
• McMorland G, Suter E, Casha S, du Plessis SJ, Hurlbert RJ. (2010). Manipulation or microdiskectomy for sciatica? A prospective randomized clinical study. Journal of Manipulative and Physiological Therapeutics, 33(8):576-584. PMID 21036279