The trial is taking place at:

Inland Northwest Research | Spokane, WA

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STEM-Parkinson's Disease

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Scion NeuroStim




Parkinson Disease
Parkinson's Disease and Parkinsonism


Device: Non-invasive brainstem stimulation

Study type


Funder types




Details and patient eligibility


This is a double-blinded, controlled, randomized clinical trial (RCT) to establish the safety and efficacy of a non-invasive neuromodulation device for treating symptoms associated with Parkinson's disease.

Full description

Up to 218 participants will enter the double-blinded, controlled, randomized clinical trial (RCT) and will self-administer treatments twice daily in the home setting over a period of 12 weeks following a 4 week baseline period. The RCT will have 6 study visits: 3 visits at the study center and 3 visits completed in the participant's home by video call.


218 estimated patients




18 to 85 years old


No Healthy Volunteers

Inclusion criteria

  • Adult participants (aged 18 - 85 years inclusive)
  • Diagnosed with Parkinson's disease according to the UK Brain Bank Criteria
  • Demonstrates a positive response to oral anti-Parkinsonian medications (i.e. dopamine replacement therapies) and treated with these medications for minimum of one year prior to the screening visit
  • Report limitation to activities of daily living (e.g., writing, walking, bathing, dressing, eating, toileting, etc.)
  • Able and willing to consent to participate in the study.
  • Willing and able to comply with study requirements.
  • Anticipate being able to remain on a stable regimen of medications used for the management of PD motor and non-motor symptoms and not to introduce new medications used to treat symptoms associated with PD during the trial.
  • Have at minimum a moderate burden of non-motor symptoms associated with Parkinson's disease
  • Have a study partner (defined as someone who sees the participant for more than one hour a day, 3 times per week) that is willing to consent and participate in the trial.
  • Have capabilities to use and access smartphones and or tablets for the collection of some study data.
  • Must be willing to answer questions related to sexual interest, arousal, and performance in an interview with study staff.

Exclusion criteria

  • Participant anticipates being unable to attend all visits and complete all study activities.

  • Women of child-bearing potential who are pregnant or plan to become pregnant during the course of the study trial. Women of child-bearing potential , who are not abstinent or exclusively in same sex relationships must:

    1. Test negative for pregnancy as indicated by a negative urine pregnancy test
    2. Agree to use an approved contraception method for the entirety of the trial
  • Have a history or prior diagnosis of dementia or evidence of dementia at study screen.

  • Have experienced a myocardial infarction, angina, or stroke within the past 12 months, or a transient ischemic attack within the past 6 months.

  • Are receiving deep brain stimulation therapy.

  • Are treated with a pump for continuous delivery of dopamine replacement medication.

  • Use apomorphine rescue.

  • Have received MRI guided high intensity focused ultrasound within the past 12 months.

  • Experience frequent falls.

  • Work night shifts

  • Use a hearing aid that is implanted or that cannot be easily removed and replaced.

  • Have a cochlear implant.

  • Have chronic (>3 months) tinnitus.

  • Have previously been diagnosed with traumatic brain injury with ongoing sequalae.

  • Have been diagnosed with a co-morbid neurological disorder that may present with symptoms overlapping with PD (e.g., stroke, brain tumor, epilepsy, Alzheimer's disease, multiple sclerosis, amyotrophic lateral sclerosis, atypical Parkinsonism or aneurysm)

  • Have unresolved complications from a previous surgical procedure at the baseline visits, such as swelling or persistent pain, that requires medical intervention.

  • Have active ear infections, or other significant ear problems.

  • Have a recent history of frequent ear infections (≥ 1 per year over the past two years)

  • Are currently enrolled or have participated in another interventional clinical trial within the last 30 days.

  • Have had eye surgery within the previous three months or ear surgery within the previous six months.

  • Have planned surgery scheduled to occur during the study that requires sedation and/or would typically be followed with a prescription for pain management.

Trial design

Primary purpose




Interventional model

Parallel Assignment


Triple Blind

218 participants in 2 patient groups

Investigational Treatment 1
Other group
Investigational treatment mode (stimulation pattern) 1
Device: Non-invasive brainstem stimulation
Investigational Treatment 2
Other group
Investigational treatment mode (stimulation pattern) 2
Device: Non-invasive brainstem stimulation

Trial contacts and locations



Central trial contact

Jemica Warren; Kara Richardson

Data sourced from

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