Abstract:
:Monitoring representative fractions of neurons from multiple brain circuits in behaving animals is necessary for understanding neuronal computation. Here, we describe a system that allows high-channel-count recordings from a small volume of neuronal tissue using a lightweight signal multiplexing headstage that permits free behavior of small rodents. The system integrates multishank, high-density recording silicon probes, ultraflexible interconnects, and a miniaturized microdrive. These improvements allowed for simultaneous recordings of local field potentials and unit activity from hundreds of sites without confining free movements of the animal. The advantages of large-scale recordings are illustrated by determining the electroanatomic boundaries of layers and regions in the hippocampus and neocortex and constructing a circuit diagram of functional connections among neurons in real anatomic space. These methods will allow the investigation of circuit operations and behavior-dependent interregional interactions for testing hypotheses of neural networks and brain function.
journal_name
J Neurophysioljournal_title
Journal of neurophysiologyauthors
Berényi A,Somogyvári Z,Nagy AJ,Roux L,Long JD,Fujisawa S,Stark E,Leonardo A,Harris TD,Buzsáki Gdoi
10.1152/jn.00785.2013subject
Has Abstractpub_date
2014-03-01 00:00:00pages
1132-49issue
5eissn
0022-3077issn
1522-1598pii
jn.00785.2013journal_volume
111pub_type
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