Micromagnetic Stimulation (μMS) Controls Dopamine Release: An in vivo Study Using WINCS Harmoni

Area of Science:

• Neuroscience
• Biomedical Engineering
• Pharmacology

Background:

• Current clinical trials for brain disorders overlook real-time neurochemical changes during therapy.
• Micromagnetic stimulation (µMS) offers a promising, highly focal, and contact-free neuromodulation approach.

Approach:

• Utilized a solenoidal microcoil (µcoil) to stimulate the medial forebrain bundle (MFB) in vivo in rodents.
• Real-time dopamine release in the striatum was monitored using fast scan cyclic voltammetry (FSCV) with carbon fiber microelectrodes (CFM).
• Employed the WINCS Harmoni tool for studying in vivo dopamine dynamics during µMS.

Key Points:

• Demonstrated successful activation of the MFB via µMS, leading to in vivo dopamine release.
• Showcased that dopamine release is dependent on the µcoil's orientation.
• Established that varying µMS intensity can modulate dopamine release concentrations.

Conclusions:

• This research enhances understanding of brain function and therapeutic interventions at the neurotransmitter level.
• The findings suggest µMS has potential as a precisely controlled neuromodulation therapy for clinical applications.