Using a group of patients with witnessed Loss of Consciousness-defined as time to follow commands (LOC) and hospitalized (sometimes only for a short time, sometimes for longer) this graph was prepared. All passed the validity check by failing no more than 1 of the 9 internal validity checks used in the MNB and were not involved in litigation.

The Group labeled as Mild TBI 5 min LOC tested at 6 months or greater from time of injury and were not in litigation are the Black line. This group had an Overall Test Battery Mean (OTBM) of 48. Each group is identified by their LOC. The thing to be aware of is the pattern of scores. That is, the shape is the unique identifier; each pattern of scores in similar except for the elevation. Therefore, assuming valid data and adequate motivation, this is what a Traumatic Brain Injury (TBI) looks like on the MNB. The second graph shows subjects with longer LOC.

Notice there is a dose response, the greater the LOC the lower the OTBM. Rohling, M.L., Meyers, J.E., Millis, S.R. (2003). Neuropsychological Impairment Following traumatic Brain Injury: A Dose-Response Analysis. The Clinical Neuropsychologist, 17,289-302.

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The clinician will also be aware that other brain injuries can have similar patterns. That is, an injury to the left hemisphere (from what ever etiology) will have similarity if similar parts of the brain are injured. The MNB contains data from more that 3000 subjects with various injuries for which the clinician can make comparisons. The Manual and computer program for the MMB contains much more detailed descriptions of various performance patterns.

The following graph shows Normals (Black line, OTBM=50T), and non litigating persons who had history of MVA and some brief confusion at the time of the accident, who passed the validity check as indicated above, and were non litigants (Blue Line, OTBM=50T). The blue line group has a small number of subjects and is only presented as a reference. You will notice that the Normals and Depressed (Green line, OTBM=48T) and Chronic Pain (Red line, OTBM=46T) and Briefly Confused (Blue line) groups are not different form each other in performance level. But each has a unique shape or pattern of results. In a study Meyers, J.E., & Rohling, M.L. (2004). Validation of the Meyers Short Battery on Mild TBI patients. Archives of Clinical Neuropsychology, 19, 637-651. We found no significant difference between Normals, Depressed and Chronic pain groups vs Mild TBI (Less that an hour of LOC).

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