1 Introduction Primary Meige syndrome (PMS) is a segmental craniocervical dystonia characterized by involuntary, axisymmetric movement of craniocervical muscles (LeDoux 2009). Although the condition was first described over a century ago (Henry 1910), its management remains a significant clinical challenge due to its obscure pathogenesis and the lack of specific oral pharmacotherapies. While local botulinum toxin (BoNT) injections offer effective symptomatic relief (Jochim et al.
