Effects of modified pen grip and handwriting training on writer's cramp.

Abstract

To evaluate the use of a modified pen grip and subsequent handwriting training in patients with writer's cramp (WC). Handwriting performance with normal and modified pen grip was examined once in healthy controls and repeatedly in patients with WC (2 baseline tests before training, directly after training, after a 3-month follow-up). Ambulatory care for motor writing disorders. Patients with WC (n=26) and healthy controls (n=14). Seven sessions of handwriting training with various motor exercises were conducted by an occupational therapist. During training, the patients always used a modified pen grip (stabilized between index and middle finger). Writing frequency and fluency, grip force on the pen, writing pressure, Fahn dystonia scale, visual analog scales for impairment and pain. Patients with WC showed increased writing pressure and grip force before training. Using the modified pen grip caused in both patients with WC and controls a decrease in pressure and grip force. Handwriting training resulted in a further improvement of both parameters in patients with WC. Grip force reduction remained stable over follow-up. Results suggest that patients with WC benefit from the use of the modified pen grip in combination with handwriting training.