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Sparse coding of movement-related neural activity

Publication ,  Conference
DiStasio, MM; Chhatbar, PY; Francis, JT
Published in: 2011 IEEE Signal Processing in Medicine and Biology Symposium, SPMB 2011
December 1, 2011

Modern systems neuroscience benefits from the ability to record from and digitize a large amount of functional data from hundreds or even thousands of neurons. Understanding, transmitting, storing, and parsing information of such volume and complexity calls for methods of dimensionality reduction. One observation about neuronal activity in mammalian brains is that populations are sparsely active; that is, only a small subset of the whole ensemble is coactive at any moment. This property may be exploited to summarize information content succinctly. This paper tests the hypothesis that information contained in ensemble activity recorded from the primate motor cortex about limb movements is preserved when the activity is projected onto a sparse basis. Spiking rate data from neurons in the motor cortex of an awake behaving macaque monkey was compressed using a sparse autoencoder network, and classifications of movement directions were made in the compressed space. Classifier performance is shown to be similar when using either compressed (sparsened) or uncompressed neural activity, demonstrating the potential use of the sparse autoencoder as an unsupervised compression algorithm for low power/low bandwidth wireless transmission of neural ensemble data. © 2011 IEEE.

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Published In

2011 IEEE Signal Processing in Medicine and Biology Symposium, SPMB 2011

DOI

ISBN

9781467303729

Publication Date

December 1, 2011
 

Citation

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DiStasio, M. M., Chhatbar, P. Y., & Francis, J. T. (2011). Sparse coding of movement-related neural activity. In 2011 IEEE Signal Processing in Medicine and Biology Symposium, SPMB 2011. https://doi.org/10.1109/SPMB.2011.6120134
DiStasio, M. M., P. Y. Chhatbar, and J. T. Francis. “Sparse coding of movement-related neural activity.” In 2011 IEEE Signal Processing in Medicine and Biology Symposium, SPMB 2011, 2011. https://doi.org/10.1109/SPMB.2011.6120134.
DiStasio MM, Chhatbar PY, Francis JT. Sparse coding of movement-related neural activity. In: 2011 IEEE Signal Processing in Medicine and Biology Symposium, SPMB 2011. 2011.
DiStasio, M. M., et al. “Sparse coding of movement-related neural activity.” 2011 IEEE Signal Processing in Medicine and Biology Symposium, SPMB 2011, 2011. Scopus, doi:10.1109/SPMB.2011.6120134.
DiStasio MM, Chhatbar PY, Francis JT. Sparse coding of movement-related neural activity. 2011 IEEE Signal Processing in Medicine and Biology Symposium, SPMB 2011. 2011.

Published In

2011 IEEE Signal Processing in Medicine and Biology Symposium, SPMB 2011

DOI

ISBN

9781467303729

Publication Date

December 1, 2011