DOI: 10.5061/dryad.4qrfj6qdb
title: Adaptive processing and perceptual learning in visual cortical areas V1 and V4

description: Neurons in visual cortical areas primary visual cortex (V1) and V4 are
 adaptive processors, influenced by perceptual task. This is reflected in
 their ability to segment the visual scene into task-relevant and
 task-irrelevant stimulus components and by changing their tuning to
 task-relevant stimulus properties according to the current top-down
 instruction. Differences between the information represented in each area
 were seen. While V1 represented detailed stimulus characteristics, V4
 filtered the input from V1 to carry the binary information required for
 the two-alternative judgement task. Neurons in V1 were activated at
 locations where the behaviorally relevant stimulus was placed well outside
 the grating-mapped receptive field. By systematically following the
 development of the task-dependent signals over the course of perceptual
 learning, we found that neuronal selectivity for task-relevant information
 was initially seen in V4 and, over a period of weeks, subsequently in V1.
 Once the learned information was represented in V1, on any given trial,
 task-relevant information appeared initially in V1 responses, followed by
 a 12-ms delay in V4. We propose that the shifting representation of
 learned information constitutes a mechanism for systems consolidation of
 memory.
description: This is raw elecrophysiological data (unsorted spike timestamps
 and waveforms, and LFPs) recorded from two different animals
description: The data are in .plx format. Recorded with Plexon amplifiers and
 Blackrock To open these .plx files you can use the open
 access code for either Matlab, Python or C++ added in the data 
description: # Adaptive processing and perceptual learning in visual cortical areas V1
 and V4
 [https://doi.org/10.5061/dryad.4qrfj6qdb](https://doi.org/10.5061/dryad.4qrfj6qdb) ## Description of the data and file structure Files were recorded from visual area V1 in Monkey C. Bisection task correspond to the first 'x' trials followed by Vernier task. The number of bisection trials per file are the "x" values on the right of each file name. bisver_170905100_mrg.pl2 / x = 807 bisection trials bisver_170906100_mrg.pl2 / x = 587 bisection trials bisver_170907100_mrg.pl2 / x = 668 bisection trials bisver_170908100_mrg.pl2 / x = 545 bisection trials These files were recorded from visual area V4 in Monkey C. Bisection task correspond to the first 'x' trials followed by Vernier task. The number of bisection trials per file are the "x" values on the right of each file name. bisver170808100_mrg.plx / x = 755 bisection trials bisver170809100_mrg.plx / x = 983 bisection trials bisver170810100_mrg.pl2 / x = 627 bisection trials bisver170811100_mrg.pl2 / x = 712 bisection trials Files were recorded from visual area V1 in Monkey J. Bisection task correspond to the first 'x' trials followed by Vernier task. The number of bisection trials per file are the "x" values on the right of each file name. Apr0621_bisver.plx / x = 460 bisection trials Apr0721_bisver.plx / x = 582 bisection trials Apr0821_bisver_mrg.plx / x = 849 bisection trials Apr0921_bisver.plx / x = 745 bisection trials These files were recorded from visual area V4 in Monkey J. Bisection task correspond to the first 'x' trials followed by Vernier task. The number of bisection trials per file are the "x" values on the right of each file name. Apr3021_bisver.plx / x = 619 bisection trials May0321_bisver.plx / x = 401 bisection trials May1321_bisver.plx / x = 1100 bisection trials May1421_bisver.plx / x = 772 bisection trials ## Sharing/Access information n/a ## Code/Software To open the .plx files you can use either Matlab, Python or C++ with the SDKs uploaded in the "PLX_DATA" zip file. The functions have annotations and supporting information.