HectoSTAR μLED Optoelectrodes for Large-Scale, High-Precision In Vivo Opto-Electrophysiology.

Area of Science:

• Neuroscience
• Bioengineering
• Systems Neuroscience

Background:

• Understanding brain function requires simultaneous recording of neural activity and manipulation of circuit inputs.
• Existing technologies for large-scale neural recording lack corresponding high-spatiotemporal-resolution manipulation techniques.
• Investigating dynamic interactions in distributed brain circuits necessitates advanced tools.

Purpose of the Study:

• To introduce a novel neural probe for simultaneous, large-scale electrical recording and optogenetic manipulation of deep brain circuits.
• To address the technological gap in high-spatiotemporal-resolution modulation techniques for neuroscience research.
• To enable detailed investigation of neural circuit dynamics in behaving animals.

Main Methods:

• Development of the hectoSTAR micro-light-emitting-diode (μLED) optoelectrode.
• Monolithic integration of 256 recording electrodes and 128 stimulation μLEDs on four silicon micro-needle shanks.
• Deployment in behaving mice to record and stimulate deep neuronal circuits (up to 6 mm depth).

Main Results:

• The hectoSTAR probe enables simultaneous electrical monitoring and optogenetic manipulation of deep neuronal circuits.
• High spatiotemporal resolution is achieved for both recording and stimulation across a large brain volume (1.3 mm × 0.9 mm).
• Demonstrated utility in dissecting long-distance network interactions across cortical layers and hippocampal regions in mice.

Conclusions:

• The hectoSTAR μLED optoelectrode provides unprecedented capabilities for neuroscience research.
• This technology opens new avenues for cellular and circuit-level investigations of brain functions in behaving subjects.
• Facilitates a deeper understanding of neural dynamics underlying behavior and cognition.