Dystonia
Dystonia is a hyperkinetic movement disorder characterised by sustained or intermittent muscle contractions causing abnormal, often repetitive, movements and postures. The pathophysiology involves dysfunction of the basal ganglia motor circuits, particularly abnormal neuronal firing patterns in the globus pallidus interna and subthalamic nucleus.
Understanding Dystonia
Dystonia exists along a clinical spectrum from focal (affecting a single body region such as the neck in cervical dystonia) through segmental and generalised (affecting the trunk and multiple limbs). The involuntary contractions are often task-specific in early stages — writer's cramp is a classic example — before spreading to other activities. The movements may be twisting, repetitive, or sustained, and are frequently accompanied by pain and functional disability that profoundly impacts quality of life. Unlike tremor, dystonic movements have a directional quality: the patient is pulled in one direction by the contracting muscle group.
Deep brain stimulation (DBS) of the globus pallidus interna has emerged as the most effective treatment for medication-refractory dystonia, improving motor function by 50–80 per cent depending on the dystonia subtype. Istanbul offers access to elite DBS neurosurgery at 60 per cent below Western costs, with experienced teams who have performed hundreds of DBS implantations.
Treatment Options for Dystonia
View All ProceduresSymptoms of Dystonia
The hallmark of dystonia is the directional, patterned nature of the abnormal movements. Cervical dystonia presents with torticollis (head turning), laterocollis (head tilting), or anterocollis/retrocollis, often with painful muscle spasms. Blepharospasm causes involuntary eye closure that can progress to functional blindness. Oromandibular dystonia affects the jaw, tongue, and lower face. Laryngeal dystonia (spasmodic dysphonia) produces a strained or breathy voice. Generalised dystonia involves the trunk and at least one limb, frequently beginning in childhood and causing severe postural deformities and gait impairment if untreated.
Diagnostic Pathways
Clinical examination by a neurologist specialising in movement disorders is the primary diagnostic tool. The dystonia is classified by body distribution (focal, segmental, multifocal, generalised), age of onset, and temporal pattern. MRI brain is performed to exclude secondary causes such as stroke, tumour, Wilson's disease, or neurodegeneration with brain iron accumulation. Genetic testing is indicated in early-onset or familial cases — DYT1 (TOR1A) and DYT6 (THAP1) are the most common genetic causes of primary dystonia. Electromyography (EMG) may help characterise the pattern of muscle activation and guide botulinum toxin injection strategies.
Advanced Treatment Options at Vellum Select
Deep Brain Stimulation (DBS)
For patients with medication-refractory generalised or segmental dystonia, Deep Brain Stimulation (DBS) in Turkey targeting the globus pallidus interna (GPi) is the gold-standard surgical treatment. Bilateral electrode implantation under stereotactic guidance, with intraoperative microelectrode recording for precise targeting, followed by implantation of a programmable pulse generator in the chest. GPi-DBS improves motor function by 50–80 per cent in primary generalised dystonia, with benefits sustained at 5+ years. Cervical dystonia patients also respond well, with significant pain reduction and postural improvement.
To discuss your dystonia diagnosis with a Vellum Select movement disorder specialist, contact us to arrange a consultation.