Evaluation of Directional Stimulation During the Implantation of Deep Brain Stimulation (DBS) Leads
Evaluation of Directional Stimulation During the Implantation of Deep Brain Stimulation (DBS) Leads
The purpose of this study is to provide proof-of-concept that directional stimulation, in an
 intraoperative setting, is perceivable in a subject and is different from omnidirectional
 stimulation. The tests will be performed using a dedicated DBS lead connected to external
 neurostimulator.
Inclusion Criteria:

 -  Subject is indicated to undergo DBS for Parkinson's disease or Essential Tremor
 according to criteria of the Study site

 -  For Parkinson Disease:

 -  Person is between 18 and 75 years of age

 -  Established diagnosis of idiopathic Parkinson's disease with progression of
 symptoms for a minimum of 2 years.

 -  Person has a history of at least 30% improvement on the Unified Parkinson's
 Disease Rating Scale with therapy in L-dopa (levodopa)

 -  Weak control of symptoms by dopaminergic therapy (off phenomenon, fluctuations on
 / off, dyskinesia on)

 -  For Essential Tremor:

 -  Person is between 18 and 80 years of age

 -  Established diagnosis of Essential Tremor for a minimum of 2 years

 -  Functional disability due to tremor was not adequately controlled by medication
 for at least 3 months prior to implant.

 -  Person has given his/her written consent

 Exclusion Criteria:

 -  Person suffering from an active major psychiatric disorder

 -  Mattis Dementia Rating Scale score <130 or otherwise not capable of discernment

 -  Presence of major co-morbidity or medical condition that may affect participation to
 the study

 -  Presence of an electrical or electromagnetic implant (e.g., cochlear implant,
 pacemaker)

 -  Person with a previous surgery for the treatment of Parkinson's disease or Essential
 Tremor

 -  Person with a previous brain ablation procedure

 -  Person who suffers from epilepsy

 -  Person who is pregnant: a pregnancy test will be performed in women of childbearing
 age

 -  Person with coagulopathies

 -  Abuse of drugs or alcohol