Alteration of Deep Brain Stimulation Parameters for Dystonia

2014-08-27 03:19:32 | BioPortfolio


Deep brain stimulation (DBS) involves placing electrodes into the brain. Through these electrodes, artificial electrical signals are chronically delivered into deep brain regions in order to alter abnormal brain activity. The artificial electrical signals are generated by a battery that is inserted under the skin of the chest. DBS is used to treat several disorders of movement, including dystonia. In dystonia, the electrodes are inserted into a brain region called the globus pallidus.

Globus pallidus stimulation can be very effective therapy for dystonia. However not all patients are equally responsive and therapeutic outcomes can be frustratingly variable. The reason for this variability is unclear. Such variability in response may need to be met by tailoring stimulation to individual patients.

Another issue with deep brain stimulation is battery life. Eventually, batteries become depleted and need to be replaced. Such battery replacements require an operation, hospital stay and the risk of introducing infection. The high electrical energy that has been used to treat dystonia means that batteries are typically replaced every year or two.

The artificial electrical signals of deep brain stimulation are delivered with three parameters; frequency (Hertz - Hz), voltage (volts) and pulse width (microseconds). It has recently been reported that lower frequency stimulation, at 60Hz rather than 130Hz, can be used effectively to treat dystonia. Such 60Hz stimulation may be more effective for some patients than others. The lower energy demands of 60Hz stimulation would also greatly improve battery life (potentially doubling battery life).

The aim of this study is to assess if 60Hz stimulation is more effective in ameliorating the dystonia of patients who have responded poorly to 130Hz pallidal stimulation. The current status of the evidence is one of clinical equipoise (uncertainty) and therefore suits a double blinded randomised trial.

Study Design

Allocation: Randomized, Endpoint Classification: Efficacy Study, Intervention Model: Parallel Assignment, Masking: Double Blind (Subject, Caregiver, Investigator, Outcomes Assessor), Primary Purpose: Treatment




Alteration of deep brain stimulator settings


University of Oxford, Nuffield Department of Surgery
United Kingdom




University of Oxford

Results (where available)

View Results


Published on BioPortfolio: 2014-08-27T03:19:32-0400

Clinical Trials [1435 Associated Clinical Trials listed on BioPortfolio]

Humanitarian Device Exemption

The purpose of this study is to allow patients to undergo deep brain stimulation (DBS) surgery for the treatment of dystonia. This is NOT a research study, but rather, a requirement by th...

Efficacy and Safety of DBS in Patients With Primary Dystonia

The purpose of this study is to evaluate the safety and effectiveness of deep brain stimulation (DBS) of the subthalamic nucleus (STN) and globus pallidus internus (GPi) for primary dyston...

Effect of Deep Brain Stimulation (DBS) on Sleep Architecture in Patients With Movement Disorders

The purpose of this prospective, participant-blinded trial is to determine the changes in sleep architecture in a cohort of subjects who have undergone deep brain stimulation (DBS) surgery...

Deep Brain Stimulation in Treating Patients With Dystonia

RATIONALE: Dystonia is a disorder in which the muscles that control voluntary movements are persistently or intermittently contracted (not relaxed). Deep brain stimulation is provided by a...

Registry of Deep Brain Stimulation With the VERCISE™ System for Treatment of Dystonia: Vercise DBS Dystonia Registry

To compile characteristics of real-world outcomes of Boston Scientific Corporation's commercially approved VerciseTM Deep Brain Stimulation (DBS) Systems for the treatment of dystonia.

PubMed Articles [11055 Associated PubMed Articles listed on BioPortfolio]

Radiofrequency Lesioning through Deep Brain Stimulation Electrodes in Patients with Generalized Dystonia.

Deep brain stimulation (DBS) is an established treatment for generalized dystonia. However, the DBS device is sometimes removed owing to hardware complications. Here, we present four cases of generali...

Toe dystonia in Parkinson's disease: Impact of subthalamic nucleus deep brain stimulation.

Off state toe dystonia (TD) is a symptom frequently encountered in Parkinson's disease (PD), but little is known about its evolution after subthalamic nucleus deep brain stimulation (STN-DBS).

Both DBS and Thalamotomy in a 13-year-old Patient with Primary Dystonia: A Case Report.

Primary dystonia is a neurological disease with the characteristics of abnormal, involuntary twisting and turning movements, which greatly affects life quality of patients. Treatments for dystonia con...

Sustained quality-of-life improvements over 10 years after deep brain stimulation for dystonia.

Little is known about the quality of life of people with dystonia and DBS beyond 5 years. The objectives of this study were (1) to examine the long-term quality-of-life outcomes in a large cohort of p...

Dystonia: diagnosis and management.

Clinical practice in dystonia has greatly evolved in recent years: we provide here a synthetic review on patient management. Dystonia is a movement disorder characterized by sustained or intermittent ...

Medical and Biotech [MESH] Definitions

The part of brain that lies behind the BRAIN STEM in the posterior base of skull (CRANIAL FOSSA, POSTERIOR). It is also known as the "little brain" with convolutions similar to those of CEREBRAL CORTEX, inner white matter, and deep cerebellar nuclei. Its function is to coordinate voluntary movements, maintain balance, and learn motor skills.

A B7 antigen that binds specifically to INDUCIBLE T-CELL CO-STIMULATOR PROTEIN on T-CELLS. It provides a costimulatory signal for T-cell proliferation and cytokine secretion.

Acquired and inherited conditions that feature DYSTONIA as a primary manifestation of disease. These disorders are generally divided into generalized dystonias (e.g., dystonia musculorum deformans) and focal dystonias (e.g., writer's cramp). They are also classified by patterns of inheritance and by age of onset.

Therapy for MOVEMENT DISORDERS, especially PARKINSON DISEASE, that applies electricity via stereotactic implantation of ELECTRODES in specific areas of the BRAIN such as the THALAMUS. The electrodes are attached to a neurostimulator placed subcutaneously.

An attitude or posture due to the co-contraction of agonists and antagonist muscles in one region of the body. It most often affects the large axial muscles of the trunk and limb girdles. Conditions which feature persistent or recurrent episodes of dystonia as a primary manifestation of disease are referred to as DYSTONIC DISORDERS. (Adams et al., Principles of Neurology, 6th ed, p77)

More From BioPortfolio on "Alteration of Deep Brain Stimulation Parameters for Dystonia"

Quick Search


Relevant Topics

Alzheimer's Disease
Of all the types of Dementia, Alzheimer's disease is the most common, affecting around 465,000 people in the UK. Neurons in the brain die, becuase  'plaques' and 'tangles' (mis-folded proteins) form in the brain. People with Al...

Acne Dermatology Eczema Psoriasis Wound Care Dermatology is the medical specialty concerned with the diagnosis and treatment of skin disorders (Oxford Medical Dictionary). As well as studying how the skin works, dermatology covers...

Antiretroviral Therapy Clostridium Difficile Ebola HIV & AIDS Infectious Diseases Influenza Malaria Measles Sepsis Swine Flu Tropical Medicine Tuberculosis Infectious diseases are caused by pathogenic...

Searches Linking to this Trial