C-Curve Observation Test

Part A

  1. Seated on table with legs fully extended, bend forward to the fullest flexion possible.
  2. A C-shaped curve should be observed when viewed from the side.
  3. All movement should be from the spine – no knee flexion.
  4. Areas of “flatness” should be noted – these are regions where normal flexion of one segment on the other is absent or reduced.

Part B

  1. Now seated on the table with knees flexed, relaxing the hamstrings, bend forward to the fullest flexion possible with hands on crest of pelvis.
  2. Observing from the side again should indicate which segments remain unable to fully move into flexion.
  3. If there is a greater degree of flexion in this position compared to the legs straight, then the hamstrings restrictions is a factor.
  4. All flat areas should be charted.

Part C

  1. The spine now should be viewed along its length, from the head or from the lumbar region.
  2. Segments that are in a rotated state can be identified and direction of rotation should be noted. Rotational deviation will be observed caused by their transverse processes. The transverse processes and ribs will produce a “mounding” on the side towards which the vertebra has rotated.