The study will consist of two parts: * In Study A, objectively assessed physical activity, gait, balance, range of movement of specific joints during walking and neurophysiological findings between patients with cervical spine stenosis (CSS) without myelopathy who will be treated conservatively and patients with stenosis and signs of myelopathy who are candidates for surgical Treatment will be compared. * In Study B, the 6-month changes in the same outcomes in patients treated conservatively (from the first specialist consultation until 6 months later) and in patients treated surgically (preoperative day and 6-month post-operatively) will be quantified.
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Difference in gait symmetry
Timeframe: approximate duration: 30 minutes. Assessment will be performed at visit 1 and will be repeated 6 months after study inclusion at visit 2
Change in balance performance
Timeframe: approximate duration: 30 minutes. Assessment will be performed at visit 1 and will be repeated 6 months after study inclusion at visit 2.
Difference in neurophysiological outcome
Timeframe: approximate duration: 30 minutes. Assessment will be performed at visit 1 and will be repeated 6 months after study inclusion at visit 2.