Neurophysiological assessment of F-, M-waves and cutaneous silent period in patients with caput patterns of cervical dystonia in the waning phase of botulinum toxin therapy

Cervical dystonia is associated with impaired inhibition and altered conduction velocities (CV4, CV5). CSPd, CSPe and CV4 are candidate markers to aid diagnosis, differentiate pseudodystonia, and monitor disease or treatment effects. These measures may also inform studies of other motor‑control disorders.