Sensory Gating Measured With Microelectrode Recording (MER) During Deep Brain Stimulation (DBS) Surgery

Parkinson's Disease Clinical Trial

Official title:

Sensory Gating Measured With Microelectrode Recording During Deep Brain Stimulation Surgery

Clinical Trial Details — Status: Enrolling by invitation

Administrative data

• NCT number: NCT02320266
• Other study ID #: 14-0358
• Status: Enrolling by invitation
• Start date: December 2014
• Est. completion date: December 2025

Study information

• Verified date: May 2024
• Source: University of Colorado, Denver
• Contact: n/a
• Is FDA regulated: No
• Study type: Observational

Clinical Trial Summary

Deep brain stimulation (DBS) is an FDA approved, and widely used method for treating the motor symptoms of Parkinson's disease (PD), Essential Tremor (ET), Dystonia and Obsessive Compulsive disorder (OCD). Over 100,000 patients worldwide have now been implanted with DBS devices. Current approved methods to locate the DBS target regions in the brain use a combination of stereotactic imaging techniques and measurements of the electrical activity of brain cells. As part of the standard clinical technique, electrical data are collected from individual nerve cells. The target brain region emits unique electrical signals. At certain brain locations, during DBS surgery, additional electrical data that are generated in response to sound will be collected. Regions of the brain that have a decreased response to repeated sound (auditory gating) may be important DBS targets for improving thinking. The aims are (i) during DBS surgery, in addition to EEG, use microelectrodes in the brain to find brain regions, along the normal path to the DBS target, where auditory gating occurs and then (ii) determine if stimulation of the identified region(s) alters auditory gating measured by EEG. Also an additional aim (iii) is to measure electrical activity at the scalp with EEG to characterize auditory gating in patients before and after DBS surgery and also a healthy control population.

Description:

Deep brain stimulation (DBS) is an FDA approved, and widely used method for treating the motor symptoms of Parkinson's disease (PD), Essential Tremor (ET), Dystonia and Obsessive Compulsive disorder (OCD). Over 100,000 patients worldwide have now been implanted with DBS devices. Current approved methods to locate the DBS target regions in the brain (subthalamic nucleus (STN) for PD) use a combination of stereotactic imaging techniques and measurements of the electrical activity of brain cells. As part of the standard clinical technique, electrical data are collected from individual nerve cells --in a procedure called microelectrode recording (MER). The target brain region emits unique electrical signals that are detected by MER during the standard DBS surgery. MER is done at stops along the way to the target. At the stops during DBS surgery, additional electrical data that are generated in response to sound will be collected. Regions of the brain that have a decreased response after repeated sound (auditory gating) may be important DBS targets for improving thinking. The aims are to:(Aim 1A) during DBS surgery, in addition to EEG, use microelectrodes in the brain to measure electrical activity with single unit activity (SUA) and local field potentials (LFP) to find brain regions along the path to the DBS target where auditory gating occurs (Aim 1A) and then determine if stimulation of the identified region(s) alters auditory gating measured by EEG(Aim 1B); and (Aim 2) measure electrical activity at the scalp with electroencephalography (EEG) to characterize auditory gating in patients before and after DBS surgery and also a healthy control population.

Recruitment information / eligibility

• Status: Enrolling by invitation
• Enrollment: 150
• Est. completion date: December 2025
• Est. primary completion date: December 2024
• Accepts healthy volunteers: Accepts Healthy Volunteers
• Gender: All
• Age group: 18 Years to 80 Years

Eligibility

Inclusion Criteria:

• subjects with Parkinson's Disease planning to undergo DBS surgery

• subjects without Parkinson's Disease

• subjects without a history of mental illness.

Exclusion Criteria:

• subjects with hearing impairment

• illicit drug use

• marijuana use

Related Conditions & MeSH terms

• Dystonia
• Essential Tremor
• Obsessive Compulsive Disorder
• Obsessive-Compulsive Disorder
• Parkinson Disease
• Parkinson's Disease

Locations

Country	Name	City	State
United States	University of Colorado	Aurora	Colorado

Sponsors (1)

Lead Sponsor	Collaborator
University of Colorado, Denver

Country where clinical trial is conducted

United States, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Changes in EEG (Measurement in response to paired auditory clicks.)	Measurement in response to paired auditory clicks.	20 min to 2 hours
Primary	Evaluation of SUA (Single unit analysis of brain response.)	Single unit analysis of brain response.	20 min
Primary	Evaluation of LFP (Local field potential of brain response.)	Local field potential of brain response.	20 min