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| ID | Type | Description | Link |
|---|---|---|---|
| R21NS111214-01 | U.S. NIH Grant/Contract | View source |
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| Name | Class |
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| National Institute of Neurological Disorders and Stroke (NINDS) | NIH |
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The purpose of this research is to test a new recorder that can measure brain activity when stimulation is turned on during deep brain stimulation (DBS) surgery. To continue to improve DBS therapy, the investigators need to better understand the changes in the brain of people with Parkinson's disease (PD). They also need to know how this is affected by DBS. Current recorders measure activity immediately after, but not during, stimulation. Standard-of-care DBS already includes the electrical recording of brain activity during movement of arms and legs. These recordings occur during the microelectrode recording part of the surgery and are used by the medical team to determine where to place the DBS electrode.
Deep brain stimulation (DBS) is shown to be very effective in alleviating the motor symptoms of Parkinson's disease (PD). However, its exact mechanism is not well-understood. Clinical studies have reported conflicting results regarding the effects of DBS, with some studies suggesting that it inhibits target neurons while some others suggest that it excites those neurons. One of the significant hurdles plaguing the study of DBS is the large artifacts caused by electrical stimulation. The large artifacts saturate the neural recorder and also make it take a long time to recover to its normal working conditions. Consequently, no reliable neural feedback can be recorded during the high frequency stimulation of DBS. The investigators have developed a new neural recorder that does not saturate even in the presence of large artifacts. The recorder has been validated in animal studies and recently in human experiments. The investigators propose to further develop the device to study the mechanisms of DBS: in Aim 1, they will develop an artifact-resilient neural recorder and related software suite to support intraoperative monitoring during DBS. In Aim 2, they will use the proposed device to carry out an intraoperative electrophysiological recording of the subthalamic nucleus (STN) or globus pallidus internus (GPi) in PD patients. The investigators will compare activities of the neurons when high or low stimulation frequency is used, when stimulation is delivered ipsilaterally or contralaterally, and when different temporal patterns of DBS pulses are used. Measurements of therapeutic effects in terms of tremor power will be obtained by a wireless inertial measurement unit. The investigators will correlate tremor power, neural responses, and stimulation parameters during DBS, which can provide new insights into the mechanisms of DBS. These insights can potentially lead to a better stimulation paradigm that can enhance the efficacy of DBS.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Neural recorder | Experimental |
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| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Novel neural recorder | Device | The neural recorder does not suffer saturation from stimulation artifacts, allowing circuits to record neural signals with higher precision. |
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| Measure | Description | Time Frame |
|---|---|---|
| Wireless 9-axis inertial measurement unit (IMU) with 3-axis accelerometer, gyroscope, and magnetometer will quantitatively measure the activity of neurons when high or low stimulation frequency is used. | The investigators will compare the activity of neurons when high or low stimulation frequency is used, when stimulation is delivered ipsilaterally or contralaterally, and when different temporal patterns of DBS pulses are used within the constraints of standard clinical practice. | For the duration of the participant's' DBS surgery. |
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| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| University of Minnesota Medical Center | Minneapolis | Minnesota | 55455 | United States |
| PubMed Identifier | Type | Citation | Retractions |
|---|---|---|---|
| 18329019 | Background | Tabbal SD, Ushe M, Mink JW, Revilla FJ, Wernle AR, Hong M, Karimi M, Perlmutter JS. Unilateral subthalamic nucleus stimulation has a measurable ipsilateral effect on rigidity and bradykinesia in Parkinson disease. Exp Neurol. 2008 May;211(1):234-42. doi: 10.1016/j.expneurol.2008.01.024. Epub 2008 Feb 14. | |
| 17230483 | Background | Nakamura K, Christine CW, Starr PA, Marks WJ Jr. Effects of unilateral subthalamic and pallidal deep brain stimulation on fine motor functions in Parkinson's disease. Mov Disord. 2007 Apr 15;22(5):619-26. doi: 10.1002/mds.21300. |
| Label | URL |
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| Related Info | View source |
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| ID | Term |
|---|---|
| D010300 | Parkinson Disease |
| ID | Term |
|---|---|
| D020734 | Parkinsonian Disorders |
| D001480 | Basal Ganglia Diseases |
| D001927 | Brain Diseases |
| D002493 | Central Nervous System Diseases |
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| 18342565 | Background | Alberts JL, Okun MS, Vitek JL. The persistent effects of unilateral pallidal and subthalamic deep brain stimulation on force control in advanced Parkinson's patients. Parkinsonism Relat Disord. 2008 Aug;14(6):481-8. doi: 10.1016/j.parkreldis.2007.11.014. Epub 2008 Mar 14. |
| 20832452 | Background | Pogosyan A, Yoshida F, Chen CC, Martinez-Torres I, Foltynie T, Limousin P, Zrinzo L, Hariz MI, Brown P. Parkinsonian impairment correlates with spatially extensive subthalamic oscillatory synchronization. Neuroscience. 2010 Nov 24;171(1):245-57. doi: 10.1016/j.neuroscience.2010.08.068. Epub 2010 Sep 9. |
| Background | A Low-Noise, Wireless, Frequency-Shaping based Neural Recorder |
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| Background | 15-DOF motor decoding based on a high performance PNS interface and deep neural network |
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| D009422 | Nervous System Diseases |
| D009069 | Movement Disorders |
| D000080874 | Synucleinopathies |
| D019636 | Neurodegenerative Diseases |