• Kingsley O Abode-Iyamah, Stephanus V Viljoen, Colleen L McHenry, Michael A Petrie, Kirsten E Stoner, Nader S Dahdaleh, Nicole M Grosland, Matthew A Howard, and Richard K Shields.
• *Department of Neurosurgery, Carver College of Medicine, The University of Iowa, Iowa City, Iowa; ‡Department of Physical Therapy and Rehabilitation Science, Carver College of Medicine, The University of Iowa, Iowa City, Iowa; §Department of Bioengineering, The University of Iowa, Iowa City, Iowa; ¶Department of Neurological Surgery, Feinberg School of Medicine, Northwestern University, Chicago, Illinois; ‖Department of Veterans Affairs, VA Medical Center, Iowa City, Iowa.
• Neurosurgery. 2016 Nov 1; 79 (5): 701-707.

BackgroundCervical spondylotic myelopathy (CSM) is a common disease of aging that leads to gait instability resulting from loss of leg sensory and motor functions. The results of surgical intervention have been studied using a variety of methods, but no test has been reported that objectively measures integrative leg motor sensory functions in CSM patients.ObjectiveTo determine the feasibility of using a novel single leg squat (SLS) test to measure integrative motor sensory functions in patients with CSM before and after surgery.MethodsFifteen patients with CSM were enrolled in this prospective study. Clinical data and scores from standard outcomes questionnaires were obtained before and after surgery. Patients also participated in experimental test protocols consisting of standard kinematic gait testing, the Purdue pegboard test, and the novel SLS test.ResultsThe SLS test protocol was well tolerated by CSM patients and generated objective performance data over short test periods. In patients who participated in postoperative testing, the group measures of mean SLS errors decreased following surgery. Gait velocity measures followed a similar pattern of group improvement postoperatively. Practical barriers to implementing this extensive battery of tests resulted in subject attrition over time. Compared with kinematic gait testing, the SLS protocol required less space and could be effectively implemented more efficiently.ConclusionsThe SLS test provides a practical means of obtaining objective measures of leg motor sensory functions in patients with CSM. Additional testing with a larger cohort of patients is required to use SLS data to rigorously examine group treatment effects.AbbreviationsBW, body weightCSM, cervical spondylotic myelopathymJOA, modified Japanese Orthopedic AssociationSLS, single leg squat.

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