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Related Experiment Video

Updated: Jul 15, 2026

A Simple Non-invasive Method for Temporary Knockdown of Upper Limb Proprioception

A Simple Non-invasive Method for Temporary Knockdown of Upper Limb Proprioception

Published on: March 3, 2018

Cognitive control signals for neural prosthetics.

S Musallam¹, B D Corneil, B Greger

¹Division of Biology, California Institute of Technology, Mail Code 216-76, Pasadena, CA 91125, USA.

Science (New York, N.Y.)

|July 13, 2004

Summary

Researchers decoded movement goals and reward values from monkey brain signals to control computer cursors. This advance in neural prosthetics could help paralyzed patients operate devices and monitor their preferences.

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Last Updated: Jul 15, 2026

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Area of Science:

Neuroscience
Biomedical Engineering
Brain-Computer Interfaces

Background:

Neural prosthetics aim to restore function for paralyzed individuals by decoding brain signals.
Current research focuses on decoding motor cortical neuron activity for hand trajectory control.

Purpose of the Study:

To decode higher-level movement goal signals from the brain.
To investigate the simultaneous decoding of expected value signals related to reward.
To assess the feasibility of using these decoded signals for controlling external devices without physical action.

Main Methods:

Decoding of neural signals related to movement goals from three monkeys.
Utilizing decoded signals to control a computer cursor.
Simultaneous decoding of expected value signals (fluid preference, reward magnitude/probability).

Main Results:

Successfully decoded higher-level movement goal signals.
Demonstrated cursor control without animal behavior, with performance improving over weeks.
Simultaneously decoded expected value signals alongside goal signals.

Conclusions:

Decoded goal signals can operate computers, robots, and vehicles for neural prosthetic applications.
Decoded expected value signals can monitor patient preferences and motivation.
This approach offers a promising avenue for enhancing the capabilities of neural prosthetics.