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Development of a wireless system for auditory neuroscience.
A J Lukes1, A T Lear, R K Snider
1Department of Electrical and Computer Engineering, Montana State University, Bozeman, MT 59717, USA.
Biomedical Sciences Instrumentation
|May 12, 2001
Summary
A new wireless system enables simultaneous recording of acoustic and neural signals for studying the auditory cortex. This technology aids in understanding how the brain processes sound in realistic environments.
Area of Science:
- Neuroscience
- Bioengineering
- Signal Processing
Background:
- The auditory cortex's function in processing communication sounds is complex.
- Studying neural activity in realistic acoustic environments requires advanced recording techniques.
Purpose of the Study:
- To develop a wireless system for transmitting simultaneous acoustic and neural signals.
- To enable the study of auditory cortex function in naturalistic settings.
Main Methods:
- A miniature transmitter multiplexes two acoustic (75 KHz sample rate) and 56 neural (18.75 KHz sample rate) signals.
- Signals are time-division multiplexed, frequency modulated onto a 2.4 GHz carrier, and transmitted.
- A receiver demodulates, digitizes, and demultiplexes signals; a DSP reconstructs the clock for synchronization.
Main Results:
- The system allows for simultaneous, high-fidelity recording of multiple neural and acoustic signals.
- Digital signal processing enables accurate reconstruction of the multiplexing clock and signal synchronization.
Conclusions:
- This wireless system facilitates simultaneous recording of numerous neurons, enabling population coding studies.
- It allows for the determination of neural functions by correlating neural and acoustic signals without predefined stimuli.