Neurophysiological evaluation of patients with degenerative diseases of the cervical spine

Diagnostic protocol for patients with degenerative diseases of the cervical spine demands, in parallel with neuroimaging methods, functional evaluation through neurophysiological methods (somatosensitive and motor evoked potentials and electromyoneurography) aiming to evaluate possible subclinical affection of spinal medula resulting in neurological signs of long tract abnormalities. Considering diversities of clinical outcomes for these patients, complex diagnostic evaluation provides a prognosis of the disease progression. METHODS. The study included 21 patients (48.24 +/- 11.01 years of age) with clinical presentation of cervical spondylarthropathy, without neuroradiological signs of myelopathy. For each patient, in addition to conventional neurophysiological tests (somatisensory evoked potentials--SSEP, motor evoked potentials--MEP, electromyoneurography--EMG, nerve conduction studies), we calculated central motor conduction time (CMCT(F)), as well the same parameter in relation to a different position of the head (maximal anteflexion and retroflexion), so-called dynamic tests.