Examination of spine

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Examination of the Spine

Source: Bailey and Love's Short Practice of Surgery, 28th Edition
The spinal column consists of 33 vertebrae with 23 intervertebral discs, supported by numerous ligaments and paraspinal muscles. Examination follows the standard orthopaedic sequence: Look - Feel - Move - Neurological - Special Tests, applied separately to the cervical, thoracic, and lumbar regions.

General Inspection (Standing Patient)

Coronal plane (front and back): A plumb line dropped from the spinous process of C7 should fall through the gluteal crease. The ear, shoulder and greater trochanter should lie in the same vertical plane.
Normal spinal alignment from behind - spinous processes marked
Sagittal plane (side view): Assess the four physiological curves - cervical lordosis (20-40°), thoracic kyphosis (20-45°), lumbar lordosis (40-60°), and sacral kyphosis.

Cervical Spine

Look

  • Expose shoulders, back muscles and scapulae
  • Look for muscle wasting and asymmetry of neck creases
  • Check shoulders are level and there is a normal cervical lordosis (20-40°)

Feel

Stand behind the patient, support the chin.
  • Soft tissues: Feel for spasm of the paraspinal muscles
  • Bone: Palpate the spinous processes for tenderness and alignment. C7 (vertebra prominens) and T1 are easily palpable at the base of the neck

Move

Motion occurs in three planes:
MovementNormal RangeMethod
Flexion45°Chin to chest; measure chin-sternum distance
Extension55°Patient looks up at ceiling
Rotation (R/L)70°Patient looks over each shoulder without moving chest
Lateral bending (R/L)40°Patient lays ear on ipsilateral shoulder

Neurological

Focus on C5 to T1 nerve roots, which supply the upper extremities. Assess sensation, tone, power, reflexes, proprioception and coordination.

Special Test - Spurling's Test

Used to detect cervical nerve root entrapment. The neck is extended and the head rotated toward the symptomatic side, then downward pressure is applied to the top of the head. Reproduction of radicular arm pain is a positive test.
Spurling's test - examiner applies downward pressure to patient's head

Thoracic Spine

Pathology commonly presents with pain and deformity. The thoracic spine is normally convex with a gentle kyphosis (20-45°).

Look

Ensure front and back from neck to gluteal cleft are visible.
  • Skin: Check for cafe-au-lait spots, hairy patches (may suggest occult neurology or bony pathology)
  • Front: Check for asymmetry of shoulder and ribcage suggesting scoliosis
  • Back: Check for difference in iliac crest height (pelvic tilt); look for coronal plane deformity (scoliosis); a rib hump suggests structural scoliosis
  • Side: Assess for increased kyphosis (sagittal plane deformity)

Feel

Palpate with one hand supporting the patient's pelvis.

Move

Forward bending test (Adam's test): Ask the patient to bend forwards to touch their toes:
Forward bending test showing rib hump in scoliosis
  • Structural scoliosis: Rib hump increases as patient bends forwards (bulges posteriorly on thoracic convex side) - diagnostic of idiopathic thoracic scoliosis with rotatory deformity
  • Functional scoliosis: Spine straightens on forward bending, no rib hump - secondary to abnormal leg lengths or lumbar muscle spasm
Lateral bending: Assesses flexibility of scoliosis; radiographs can be taken in this position.

Lumbar Spine

Always examine the pelvis, hips, lower limbs, gait, and peripheral vascular system alongside the lumbar region. Always consider referred pain - nerve irritation in the lumbar spine can mimic lower limb problems.

Look

  • Back: Check skin at base of spine for hairy tufts and dimples (underlying spina bifida); unilateral prominence of spinal muscles suggests muscle spasm
  • Side: The lumbar lordosis (normal 40-60°) should have a smooth concavity; loss of lordosis suggests muscle spasm

Feel

Feel for any 'step-off' in the spinous processes - this may indicate forward slippage of one vertebra on another (spondylolisthesis).

Move

MovementNormal RangeMethod
Forward flexion40-60°Schober's test: thumb on T12/L1 junction, index on lumbosacral junction - measure separation as patient bends; also note finger-floor distance
Lateral bending-Slide hand down outer thigh; compare each side
Rotation3-18°Hold pelvis still; ask patient to twist and look over shoulder

Neurological

Focus on L1 to S1 nerve roots. Assess sensation, tone, power, reflexes (particularly knee jerk L3/4, ankle jerk S1), proprioception and coordination.

Special Tests

Lasègue's Straight Leg Raise (SLR) Test - increases tension along the sciatic nerve (L5 and S1 roots):
  1. Patient supine - elevate the leg with the knee bent to check pain-free hip movement
  2. Straighten the knee and note the angle at which hamstrings allow hip to flex
  3. Lower the hip until tension is removed from hamstrings, then firmly dorsiflex the ankle
  4. Positive test: pain running down the leg (sciatica) on ankle dorsiflexion
Contralateral stretch test: Elevate the asymptomatic leg; if pain is reproduced in the other (symptomatic) leg, the test is positive (indicates significant nerve root compression, e.g. large disc prolapse).

Summary: Spine Examination at a Glance

StepCervicalThoracicLumbar
LookLordosis, wasting, alignmentScoliosis, rib hump, kyphosis, skin marksLordosis, hairy tufts, dimples, muscle prominence
FeelParaspinal spasm, spinous processesPalpate with pelvis supportedStep-off deformity
MoveFlex/Ext (45°/55°), Lat bend (40°), Rotation (70°)Forward bending test, lateral bendingFlex (40-60°), Lat bend, Rotation (3-18°)
NeuroC5-T1 roots (upper limb)Thoracic roots (trunk)L1-S1 roots (lower limb)
Special testsSpurling's testForward bending (Adam's) testSLR (Lasègue's), Contralateral stretch
  • Bailey and Love's Short Practice of Surgery, 28th Ed., Chapter 35, pp. 497-500
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