Writer's cramp is a focal, task-specific form of upper limb dystonia in which involuntary muscle contractions selectively interfere with the act of writing or comparable fine manual tasks. This protocol addresses the first-line clinical approach for managing dystonia in this setting.
The patient presents with writer's cramp — a focal upper limb (hand) dystonia — characterised by dystonic posturing or muscle co-contraction that emerges specifically during writing. This is a recognised subtype of focal task-specific dystonia.
First-line management centres on targeted botulinum toxin injection to the affected upper limb musculature. Neurostimulation of the forearm is an additional modality addressed in the full protocol. Selection between approaches, dosing guidance, and follow-up criteria are detailed in the complete regimen.
DOI: 10.1111/j.1468-1331.2010.03042.x
BoNT/A is effective for writer's cramp (level A) and is possibly effective in other types of upper limb dystonia, but controlled dose adjustments are needed because of frequent muscle weakness (good practice point).
Transcutaneous electrical nerve stimulation to forearm flexor muscles administered is probably effective in patients with writer's cramp (level B).
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