Writer's cramp


Writer's cramp
Writer's cramp
Classification and external resources
ICD-10 F48.8, G25.8
ICD-9 300.89, 333.84

Writer's cramp, also called mogigraphia and scrivener's palsy, causes a cramp or spasm affecting certain muscles of the hand and/or fingers.[1] Writer's cramp is a task-specific focal dystonia of the hand.[2] 'Focal' refers to the symptoms being limited to one location (the hand in this case), and 'task-specific' means that symptoms first occur only when the individual engages in a particular activity. Writer's cramp first affects an individual by inhibiting their ability to write.[3]

Contents

Causes

Although the etiology of writer's cramp is not well known, it was historically believed to be the result of excessive fine motor activity, possibly complicated by a tense or otherwise inappropriate writing technique.[4] More recently, Karin Rosenkranz et al. have suggested that this is not necessarily the case.[5] Musician's cramp (a similar focal dystonia which affects some 1% of instrumentalists[6]) has historically been grouped together with writer's cramp because of this and their common task-specificity. Rosenkranz et al. have more recently identified significant differences between the two populations, however.[5] No matter exactly how it arises, researchers generally agree that these types of focal dystonia are the result of a basal ganglia and/or sensorimotor cortex malfunction in the brain.

Early symptoms may include loss of precision muscle coordination (sometimes first manifested in declining penmanship, frequent small injuries to the hands, dropped items and a noticeable increase in dropped or chipped dishes), cramping pain with sustained use and trembling. Significant muscle pain and cramping may result from very minor exertions like holding a book and turning pages. It may become difficult to find a comfortable position for arms and legs with even the minor exertions associated with holding arms crossed causing significant pain similar to restless leg syndrome. Affected persons may notice trembling in the diaphragm while breathing, or the need to place hands in pockets, under legs while sitting or under pillows while sleeping to keep them still and to reduce pain. Trembling in the jaw may be felt and heard while lying down, and the constant movement to avoid pain may result in the grinding and wearing down of teeth, or symptoms similar to TMD. The voice may crack frequently or become harsh, triggering frequent throat clearing. Swallowing can become difficult and accompanied by painful cramping.

Electrical sensors (EMG) inserted into affected muscle groups, while painful, can provide a definitive diagnosis by showing pulsating nerve signals being transmitted to the muscles even when they are at rest. The brain appears to signal portions of fibers within the affected muscle groups at a firing speed of about 10 Hz causing them to pulsate, tremble and contort. When called upon to perform an intentional activity, the muscles fatigue very quickly and some portions of the muscle groups do not respond (causing weakness) while other portions over-respond or become rigid (causing micro-tears under load). The symptoms worsen significantly with use, especially in the case of focal dystonia, and a "mirror effect" is often observed in other body parts: use of the right hand may cause pain and cramping in that hand as well as in the other hand and legs that were not being used. Stress, anxiety, lack of sleep, sustained use and cold temperatures can worsen symptoms.

Direct symptoms may be accompanied by secondary effects of the continuous muscle and brain activity, including disturbed sleep patterns, exhaustion, mood swings, mental stress, difficulty concentrating, blurred vision, digestive problems and short temper. People with dystonia may also become depressed and find great difficulty adapting their activities and livelihood to a progressing disability. Side effects from treatment and medications can also present challenges in normal activities.

In some cases, symptoms may progress and then plateau for years, or stop progressing entirely. The progression may be delayed by treatment or adaptive lifestyle changes, while forced continued use may make symptoms progress more rapidly. In others, the symptoms may progress to total disability, making some of the more risky forms of treatment worth considering

Treatment

Although dystonias may be induced by chemical exposure/ingestion, brain injury, or hereditary/genetic predisposition, the task-specific focal dystonias such as writer's cramp are a unique challenge to diagnose and treat. Some cases may respond to chemical injections - botulinum toxin (botox) is often cited, though it is not helpful in all cases.[7] Behavioral retraining attempts may include changing technique, switching hands, physical therapy, biofeedback, constraint-induced motion therapy, and others. Some writing instruments allow variations of pressure application for use. None of these are effective in all cases, however.

See also

References

  1. ^ Pearce, J. "A note on scrivener's palsy." J Neurol Neurosurg Psychiatry. 2005 April; 76(4): 513. doi: 10.1136/jnnp.2004.044743. [1]
  2. ^ Dystonia Medical Research Foundation: Quick Facts about Writer's Cramp
  3. ^ Dystonia Medical Research Foundation: Glossary
  4. ^ Sataloff, Robert Thayer, Alice G. Brandfonbrener, and Richard J. Lederman, eds. Textbook of Performing Arts Medicine. New York: Raven Press, 1991. (p. 197)
  5. ^ a b Karin Rosenkranz, Aaron Williamon, et al. "Pathophysiological difference between musician’s dystonia and writer’s cramp." Brain 128 (2005): 918-931.
  6. ^ Hans-Christian Jabusch and Eckart Altenmuller. "Epidemiology, phenomenology, and therapy of musician's cramp" in Music, Motor Control, and the Brain. Oxford, New York: Oxford University Press, 2006: 265-282.
  7. ^ A. J. Lees, N. Turjanski, et al. "Treatment of cervical dystonia hand spasms and laryngeal dystonia with botulinum toxin." Journal of Neurology 239 (1992): 1-4.

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Look at other dictionaries:

  • Writer's cramp — Writer Writ er, n. [AS. wr[=i]tere.] [1913 Webster] 1. One who writes, or has written; a scribe; a clerk. [1913 Webster] They [came] that handle the pen of the writer. Judg. v. 14. [1913 Webster] My tongue is the pen of a ready writer. Ps. xlv. 1 …   The Collaborative International Dictionary of English

  • writer's cramp — n a painful spasmodic cramp of muscles of the hand or fingers brought on by excessive writing called also graphospasm …   Medical dictionary

  • writer's cramp — n [U] a feeling of stiffness in your hand that you get after writing for a long time …   Dictionary of contemporary English

  • writer's cramp — noun uncount a pain in your hand or arm caused by writing for a long time …   Usage of the words and phrases in modern English

  • writer's cramp — ► NOUN ▪ pain or stiffness in the hand caused by excessive writing …   English terms dictionary

  • writer's cramp — n. painful, spasmodic contraction of the muscles of the hand or fingers, resulting from writing for too long a time …   English World dictionary

  • writer's cramp — noun muscular spasms of thumb and forefinger while writing with a pen or pencil • Syn: ↑graphospasm • Hypernyms: ↑spasm, ↑cramp, ↑muscle spasm * * * noun also writer s palsy …   Useful english dictionary

  • writer's cramp — {n.} Pain in the fingers or hand caused by too much writing. * /Holding your pencil too tightly for too long often gives you writer s cramp./ Often used humorously to stress the idea that you have been doing a lot of writing./ * /By the time Mary …   Dictionary of American idioms

  • writer's cramp — {n.} Pain in the fingers or hand caused by too much writing. * /Holding your pencil too tightly for too long often gives you writer s cramp./ Often used humorously to stress the idea that you have been doing a lot of writing./ * /By the time Mary …   Dictionary of American idioms

  • writer's\ cramp — noun Pain in the fingers or hand caused by too much writing. Holding your pencil too tightly for too long often gives you writer s cramp. Often used humorously to stress the idea that you have been doing a lot of writing. By the time Mary… …   Словарь американских идиом