The maximum negative rotation away from the initial value that this muscle can apply.
The center property specifies the rotation of the bone when the muscle is at "rest". The min value specfies the maximum negative rotation in degrees away from the rest value that the muscle can apply. The max value specifies a similar limit but in the positive direction of rotation.
The allowed range for the minimum is -180..0 degrees.
Additional resources: HumanLimit.useDefaultValues.