Neurology Edited by Professor Emeritus Desire' Dubounet, IMUNE

4. Extension: Starting from the neutral position with the patientbending as far backward as possible, follow the range of motion with thegoniometer arm. Record the angle that subtends the arc of motion.5. Consult the Abnormal Motion Section of Table A1 to determine theimpairment of the whole person.Example: 20° active flexion from neutral position (0°) is equivalent to7% impairment of the whole person.6. Add the impairment values contributed by flexion and extension.Their sum represents the impairment of the whole person that iscontributed by flexion and extension abnormalities of the thoracolumbarregion.