Forward Flexion Test

Forward flexion makes rotational and lateral differences easier to see because gravity accentuates trunk imbalance. In a person with suspected scoliosis, vertebral rotation can produce greater prominence on one side of the rib cage when the back is bent. This positioning therefore improves visual screening for asymmetry, but it does not establish the underlying condition or its severity.

Rib prominence is interpreted as a visible sign of trunk asymmetry rather than a standalone diagnosis. The clinician compares the two sides of the back to identify whether one side becomes more prominent during bending. This observation can support concern about spinal curvature and guide further evaluation, while recognizing that the maneuver cannot confirm scoliosis by itself.

A scoliometer adds a measurement to the visual examination by quantifying trunk rotation. This can make the observed asymmetry more objective than inspection alone and help clinicians decide whether additional assessment is warranted. However, the instrument does not make the Forward Flexion Test diagnostic, determine curve severity, or replace appropriate clinical evaluation and imaging when those are indicated.

To perform the maneuver, the patient bends forward while allowing the arms to remain relaxed. The examiner then observes the back from both sides, looking for unequal rib prominence or other trunk imbalance. Consistent positioning matters because the test depends on gravity accentuating existing asymmetry; a scoliometer may be added when a quantitative trunk-rotation reading is useful.

Relaxed arms and forward bending are important conditions because they allow the back’s asymmetry to become visible rather than obscured by an active posture. Viewing both sides prevents the assessment from relying on a single contour or prominence. These steps support a more balanced screen, although visual findings still require cautious interpretation and do not quantify the spinal curve.

In clinical practice, the maneuver is useful when a physical examination or screening program raises concern about spinal alignment. Its simplicity and low cost support use in settings such as school screening, while an asymmetric finding can inform decisions about further evaluation or imaging. The result should be treated as a screening observation, not as confirmation or severity grading.