Seated Flexion Test

The seated flexion test is a diagnostic technique used to assess sacroiliac joint dysfunction by observing asymmetry in the movement of the posterior superior iliac spines (PSIS) when a patient bends forward from a seated position.

A positive standing flexion test indicates asymmetry or restriction in the motion of the sacroiliac joints when the patient bends forward from a standing position, suggesting dysfunction or imbalance in the pelvis or sacrum.

When performing a Seated Flexion Test, the examiner places their thumbs on the posterior superior iliac spines (PSIS) to palpate and monitor the movement of these bony prominences during the patient's forward bending motion.