A Closed-Loop Optogenetic Platform

Area of Science:

• Neuroscience
• Biomedical Engineering
• Optogenetics

Background:

• Neuromodulation is a key treatment for neurological disorders.
• Enhanced spatial, temporal, and cell-type specificity is needed to broaden neuromodulation's therapeutic applications.
• Optogenetics offers precise cell-type targeting for neural stimulation without disrupting electrical recordings.

Purpose of the Study:

• To develop an open-source platform for closed-loop optogenetic neuromodulation.
• To integrate custom hardware, real-time algorithms, and a user interface for precise neural control.
• To validate the system's performance for preclinical neuroscience applications and potential human translation.

Main Methods:

• Designed and implemented the Controlling Abnormal Network Dynamics using Optogenetics (CANDO) Control System (CS).
• Utilized custom CANDO LED optrodes for simultaneous electrical recording and optical stimulation.
• Developed a real-time closed-loop algorithm on a microcontroller and a PC-based Graphical User Interface (GUI) for system control and data acquisition.

Main Results:

• The CANDO system successfully integrates custom integrated circuitry for recording and stimulation.
• Real-time closed-loop algorithms running on a microcontroller enable precise neural activity control.
• Demonstrated the system's capability to modulate neuronal oscillations both in vitro and in vivo.

Conclusions:

• The developed open-source platform provides a flexible and expandable solution for closed-loop optogenetic neuromodulation.
• The system facilitates precise control over neural activity, advancing preclinical neuroscience research.
• This technology holds potential for future translation to human therapeutic applications.