Overview
Cervical flexion/extension evaluates the range of motion and quality of movement in the neck during forward and backward bending. This assessment provides valuable information about cervical spine mobility and function.Instructions
From a standing position facing forward, flex the neck bringing your chin close to your chest and hold for ~1 second. Then extend your neck and look up as far as possible, also holding for ~1 second, before returning to the starting position. Keep your back straight and shoulders square during the motion.Example Videos
Dimensions
Required inputs for processing:- None
Generic Outputs
Every capture includes session metadata, standard joint angle/velocity time series, and 3D keypoint positions common to all movements. See Generic Outputs for the full list.Discrete Metrics
Notes
- Measurements are based on FreeHeadAngleWRTTrunkXYZ.X with 90° offset
- Sufficient flexion is defined as ≥ 45°
- Sufficient extension is defined as ≥ 70°
- Sufficient total ROM is defined as ≥ 115°