Abstract: Apparatus and method are disclosed for providing a noninvasive testing of the status of the motor muscle response of an individual by testing specific voluntary and involuntary motor responses. The voluntary motor response is tested by having the individual under test enter a preselected code sequence (for example, in a keypad) and measuring the parameters associated with the sequence entry. The measured parameters are compared with baseline, non-impaired, parameters for that individual performing the same activity. The involuntary motor response is measured by introducing a transient light stimulus to the pupil of the eye and measuring the response and recovery parameters of the pupil to the light stimulus. The measured involuntary response parameters to the light stimulus is also compared to baseline, non-impaired parameters for the individual responding to the same situation.