> ## Documentation Index
> Fetch the complete documentation index at: https://docs.uplift.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Cervical Rotation

> Biomechanical analysis of cervical spine rotation range of motion assessment.

## Overview

Cervical rotation evaluates the range of motion and quality of movement in the neck during left and right rotation. This assessment provides valuable information about cervical spine mobility and function.

## Instructions

Stand or sit upright with shoulders relaxed and spine in a neutral position. Slowly rotate your head to one side as far as possible without moving your shoulders or trunk. Hold briefly at maximum rotation, then return to center. Repeat on the opposite side.

## Example Videos

### Left

<Frame>
  <video controls src="https://uplift-docs-assets.s3.amazonaws.com/range_of_motion/range_of_motion-cervical_rotation-left_combined.mp4" />
</Frame>

### Right

<Frame>
  <video controls src="https://uplift-docs-assets.s3.amazonaws.com/range_of_motion/range_of_motion-cervical_rotation-right_combined.mp4" />
</Frame>

## Dimensions

Required inputs for processing:

* **Direction**

## Generic Outputs

Every capture includes session metadata, standard joint angle/velocity time series, and 3D keypoint positions common to all movements. See [Generic Outputs](/biomechanics/activities/generic_outputs) for the full list.

## Discrete Metrics

| Metric                     | Units   | Description                                  | Column Name                          |
| -------------------------- | ------- | -------------------------------------------- | ------------------------------------ |
| MaxLeftRotation            | degrees | Maximum left rotation angle                  | `cervical_rotation_left_peak`        |
| MaxRightRotation           | degrees | Maximum right rotation angle                 | `cervical_rotation_right_peak`       |
| MaxLeftRotationSufficient  | -       | Whether left rotation is sufficient (≥ 45°)  | `cervical_rotation_left_functional`  |
| MaxRightRotationSufficient | -       | Whether right rotation is sufficient (≥ 45°) | `cervical_rotation_right_functional` |
| FullRotationRangeOfMotion  | degrees | Total rotation range of motion               | \`\`                                 |

## Notes

* Sufficient rotation is defined as ≥ 45° in each direction
* Measurements are based on HeadAngleWRTTrunkXYZ.Z
* Kinematic data typically captured at 30 or 60 Hz for range-of-motion activities