Book contents
- Frontmatter
- Dedication
- Contents
- List of Contributors
- Preface
- Chapter 1 The pretherapeutic history of botulinum neurotoxin
- Chapter 2 Botulinum neurotoxin: history of clinical development
- Chapter 3 Pharmacology of botulinum neurotoxins
- Chapter 4 Immunological properties of botulinum neurotoxins
- Chapter 5 Treatment of cervical dystonia
- Chapter 6 Examination and treatment of complex cervical dystonia
- Chapter 7 Ultrasound guidance for botulinum neurotoxin therapy: cervical dystonia
- Chapter 8 Treatment of blepharospasm
- Chapter 9 Botulinum neurotoxin in oromandibular dystonia
- Chapter 10 Treatment of focal hand dystonia
- Chapter 11 Botulinum neurotoxin therapy of laryngeal muscle hyperactivity syndromes
- Chapter 12 The use of botulinum neurotoxin in otorhinolaryngology
- Chapter 13 Treatment of hemifacial spasm
- Chapter 14 Spasticity
- Chapter 15 The use of botulinum neurotoxin in spastic infantile cerebral palsy
- Chapter 16 The role of ultrasound for botulinum neurotoxin injection in childhood spasticity
- Chapter 17 The use of botulinum neurotoxin in spasticity using ultrasound guidance
- Chapter 18 The use of botulinum neurotoxin in tic disorders and essential hand and head tremor
- Chapter 19 Treatment of stiff-person syndrome with botulinum neurotoxin
- Chapter 20 Botulinum neurotoxin applications in ophthalmology
- Chapter 21 Cosmetic uses of botulinum neurotoxins
- Chapter 22 Hyperhidrosis
- Chapter 23 Botulinum neurotoxin A treatment for ischemic digits
- Chapter 24 Botulinum neurotoxin in wound healing
- Chapter 25 Use of botulinum neurotoxin in neuropathic pain
- Chapter 26 The use of botulinum neurotoxin in the management of headache disorders
- Chapter 27 The use of botulinum neurotoxin in musculoskeletal pain and arthritis
- Chapter 28 Treatment of plantar fasciitis with botulinum neurotoxins
- Chapter 29 Use of botulinum neurotoxin in the treatment of low-back pain
- Chapter 30 Use of botulinum neurotoxin in the treatment of piriformis syndrome
- Chapter 31 Ultrasound-guided botulinum neurotoxin injections for thoracic outlet syndrome
- Chapter 32 Botulinum neurotoxin in the gastrointestinal tract
- Chapter 33 Botulinum neurotoxin applications in urological disorders
- Index
- References
Chapter 10 - Treatment of focal hand dystonia
Published online by Cambridge University Press: 05 February 2014
- Frontmatter
- Dedication
- Contents
- List of Contributors
- Preface
- Chapter 1 The pretherapeutic history of botulinum neurotoxin
- Chapter 2 Botulinum neurotoxin: history of clinical development
- Chapter 3 Pharmacology of botulinum neurotoxins
- Chapter 4 Immunological properties of botulinum neurotoxins
- Chapter 5 Treatment of cervical dystonia
- Chapter 6 Examination and treatment of complex cervical dystonia
- Chapter 7 Ultrasound guidance for botulinum neurotoxin therapy: cervical dystonia
- Chapter 8 Treatment of blepharospasm
- Chapter 9 Botulinum neurotoxin in oromandibular dystonia
- Chapter 10 Treatment of focal hand dystonia
- Chapter 11 Botulinum neurotoxin therapy of laryngeal muscle hyperactivity syndromes
- Chapter 12 The use of botulinum neurotoxin in otorhinolaryngology
- Chapter 13 Treatment of hemifacial spasm
- Chapter 14 Spasticity
- Chapter 15 The use of botulinum neurotoxin in spastic infantile cerebral palsy
- Chapter 16 The role of ultrasound for botulinum neurotoxin injection in childhood spasticity
- Chapter 17 The use of botulinum neurotoxin in spasticity using ultrasound guidance
- Chapter 18 The use of botulinum neurotoxin in tic disorders and essential hand and head tremor
- Chapter 19 Treatment of stiff-person syndrome with botulinum neurotoxin
- Chapter 20 Botulinum neurotoxin applications in ophthalmology
- Chapter 21 Cosmetic uses of botulinum neurotoxins
- Chapter 22 Hyperhidrosis
- Chapter 23 Botulinum neurotoxin A treatment for ischemic digits
- Chapter 24 Botulinum neurotoxin in wound healing
- Chapter 25 Use of botulinum neurotoxin in neuropathic pain
- Chapter 26 The use of botulinum neurotoxin in the management of headache disorders
- Chapter 27 The use of botulinum neurotoxin in musculoskeletal pain and arthritis
- Chapter 28 Treatment of plantar fasciitis with botulinum neurotoxins
- Chapter 29 Use of botulinum neurotoxin in the treatment of low-back pain
- Chapter 30 Use of botulinum neurotoxin in the treatment of piriformis syndrome
- Chapter 31 Ultrasound-guided botulinum neurotoxin injections for thoracic outlet syndrome
- Chapter 32 Botulinum neurotoxin in the gastrointestinal tract
- Chapter 33 Botulinum neurotoxin applications in urological disorders
- Index
- References
Summary
Introduction
Focal hand dystonia (FHD) is characterized by dystonic hand contractions that are often aggravated by purposeful actions and may be specific to a particular task. For example, a patient may have dystonia when using the hand for writing but not for other tasks such as eating or typing. The term “occupational dystonia” is used when dystonia affecting performance of the job arises in individuals with a particular occupation, usually an occupation requiring repetitive and excessive fine motor activity. The occupations particularly prone to have focal task-specific dystonia are listed in Table 10.1. Most of these hand dystonias fall under the rubric of primary focal dystonias.
This chapter discusses writer’s cramp and musician’s dystonia (cramp) in detail, the two most common occupational dystonias, followed by a discussion of other focal occupational dystonias.
Pathogenesis
The exact cause of FHD is not yet elucidated. A consistent physiological finding is excessive activation of antagonists and overflow and prolongation of muscle activation. Both of these are thought to reflect deficiency of inhibition at multiple levels of the motor system circuitry (Hallett, 2000, 2006a,b). Dopamine dysfunction has also been implicated. Although FHD is a movement disorder, somatosensory dysfunction is also present, including distorted sensory maps of the affected hand (Bara-Jimenez et al., 1998) and impaired sensory discrimination (Sanger et al., 2001). Structural MRI analyses have shown increased gray matter volume in the basal ganglia of musicians (Granert et al., 2011) and writers (Garraux et al., 2004) with FHD. Functional MRI has shown impaired activation of the primary sensorimotor and supplementary motor cortex during voluntary muscle relaxation and contraction (Oga et al., 2002). A genetic factor in the development of hand dystonia is possible, as up to 20% of patients with writer’s cramp have family members with dystonia.
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- Information
- Manual of Botulinum Toxin Therapy , pp. 71 - 84Publisher: Cambridge University PressPrint publication year: 2014
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