Total or partial loss of use of a member of the body directly caused by a work-related injury may result in permanent partial disability. The Industrial Commission ultimately determines permanent partial disability based on the impairment ratings of physicians. When there is a permanent impairment to one or more of the parts of the body listed in the Workers’ Compensation Act, the employee may receive a set period of benefits without consideration of the employee’s ability to earn wages. Permanent partial disability benefits are generally based upon a combination of the impairment ratings, the parts of the employee’s body involved, and the employee’s average weekly wage.