Bohannon R W, Corrigan D
Department of Physical Therapy, School of Allied Health, University of Connecticut, Storrs 06269, USA.
Percept Mot Skills. 2000 Jun;90(3 Pt 1):747-50. doi: 10.2466/pms.2000.90.3.747.
This retrospective study summarizes the range of knee extension forces associated with the manual muscle test grade of 5. The range of the forces (>560 Newtons) was large and encompassing of more than 86% of measurable forces. These findings help to explain the insensitivity of manual muscle testing and why it has such a profound ceiling effect.
