The MRC scale is a 6-point system that ranges from 0 to 5. It is used to measure the strength of various muscle groups. The scale is as follows: - 0: No muscle contraction visible. - 1: Flicker of contraction visible but no movement. - 2: Movement possible but not against gravity. - 3: Movement possible against gravity but not against resistance. - 4: Movement possible against some resistance. - 5: Normal strength.
