The advent of computerized software and hardware programs, incorporati
ng well researched data bases, including normative data, performance v
alidation techniques, and video-biomechanical analysis, have improved
the data acquisition process and accuracy of functional ability evalua
tions. The blend of this higher technology with reality based domain t
esting of worker function, allows for a more complete understanding of
an individual's true functional abilities. The principles of an objec
tive assessment process will be integrated with a discussion of impair
ment as it applies to the peripheral nervous system. A case study will
illustrate principles of permanent impairment and job-specific disabi
lity, utilizing the American Medical Association Guides, 4th edition.
(C) 1998 Elsevier Science Ireland Ltd. All rights reserved.