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Using High-Density Electrophysiological Recordings to Investigate Neural Mechanisms in Small and Large Animals

Recorded On:6/28/2022

Duration:60 minutes

The ability to record network activity using emerging high-density electrophysiological arrays has revolutionized understanding of the link between brain function and behavior. In this webinar, Dr. Michael Long from the NYU Grossman School of Medicine and Dr. Kari Hoffman from Vanderbilt University present their work investigating the neural mechanisms of learning, memory, and behavior using high-density silicon probes from Diagnostic Biochips in small and large animals.

In the first portion of the webinar, Dr. Long discusses how his laboratory has used custom-built (and now standard) probes to investigate the neural mechanisms of vocal production in two model systems: the zebra finch (a songbird) and a newly characterized Costa Rican singing mouse. In ongoing work, they have begun to apply these approaches to the study of human speech. His team has collaborated with Diagnostic Biochips and the University of Iowa Department of Neurosurgery to develop a recording electrode for measuring population activity in the human brain. Through these combined efforts, they have advanced understanding of the neural mechanisms of vocal production that can inform therapeutic approaches intended to combat a range of communication disorders.

In the second portion of the webinar, Dr. Hoffman introduces work in her lab investigating the neural mechanisms of learning and memory in freely-behaving macaques. This includes recording neural signatures from animals in a rich environment to examine how experiences shape new learning. Using spatially resolved units, distinct waveforms, and interactions with local currents and fields, they hope to identify the role of functional cell types in network states and network plasticity. Dr. Hoffman also describes the features and current limitations of the probe, and presents preliminary wireless recording results from her lab. She concludes with a discussion of factors that may make it more or less suitable for other users, and best practices for generating high quality data.

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Speaker(s)

Michael Long, PhD

Professor

NYU Grossman School of Medicine

Michael Long is the Thomas and Susanne Murphy Professor of Neuroscience at the NYU Grossman School of Medicine where he studies the neural circuitry contributing to skilled movements, often in the service of learned vocal sequences.

Kari Hoffman, PhD

Associate Professor

Vanderbilt University

Dr. Hoffman is an Associate Professor in Psychological Sciences at Vanderbilt University, and her lab is focused on discovering the dynamics and mechanisms of plasticity in neural ensembles during perception and memory in macaques.
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Behavioral Neuroscience
Cognitive Neuroscience
Neuromodulation
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Mouse
Rat
Songbird
NHP
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Chronic recordings
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