(English captions by Andrea Matsumoto from the University of Michigan)
The standing flexion test assesses for lumbosacral, sacroiliac, or pelvic dysfunction.
The examiner stands behind the patient and places hands on the iliac crests with thumbs
over the inferior notch of the posterior superior iliac spine.
The patient slowly flexes forward.
If the posterior superior iliac spine moves more cephalad on one side, the test is positive,
indicating dysfunction.