Selectivity of spikes and local field potential recordings in macaque inferior temporal cortex
Supplementary Material
A.I. Memo No. 2004-020
C.B.C.L. Paper No. CBCL-240
Gabriel Kreiman*, Chou Hung*, Alexander Kraskov, Rodrigo Quiroga, Tommy Poggio, Jim DiCarlo
Center for Biological and Computational Learning
Department of Brain and Cognitive Sciences
Computation and Systems Biology Initiative
McGovern Institute for Brain Research
Massachusetts Institute of Technology
*These two authors contributed equally to this work
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Methods
Results
SUA (single-unit activity)
MUA (multi-unit activity)
LFP (local field potentials)
1
Preprocessing
preprocessing of SUA
preprocessing of MUA
preprocessing of LFP
2
Short-term stationarity
short term stationarity SUA
short term stationarity MUA
short term stationarity LFP
3
Correlation between signal changes
correlation between change in MUA and LFP signals with time
4
Response plots 1
raster plots
LFP raw responses
5
Response plots 2
raster plots + LFP raw responses
LFP responses below 40 Hz
6
Analysis interval
proportion of selective sites vs. analysis time
proportion of selective sites vs. analysis time
7
200 ms stimulus presentation
200 ms on
8
Selectivity
SUA selectivity
MUA selectivity
LFP selectivity
9
Summary selectivity
summary selectivity
10
Comparison of selectivity of spikes and LFPs 1
selectivity comparison: SUA vs LFP
selectivity comparison: MUA vs LFP
11
Comparison of selectivity of spikes and LFPs 2
overlap in top 10 responses: SUA vs LFP
overlap in top 10 responses: MUA vs LFP
12
Comparison of selectivity of spikes and LFPs 3
SUA vs LFP for different frequency bands
MUA vs LFP for different frequency bands
13
Correlation between spikes and LFPs 1
Correlation between SUA and LFP
Correlation between MUA and LFP
14
Correlation between spikes and LFPs 2
Correlation between SUA and LFP (selective sites)
Correlation between MUA and LFP (selective sites)
15
Comparison of selectivity of SUA and MUA
Correlation between SUA and MUA responses
16
Correlation between sites
correlation in spike count between sites
correlation in spike count between sites
correlation in LFP signal between sites
17
Correlation between sites vs distance
correlation in spike counts vs distance between sites
correlation in spike counts vs distance between sites
correlation in LFP signal vs distance between sites
18
Correlation between sites vs distance between sites for specific groups
correlation in spike counts vs distance between sites for specific groups of pictures
correlation in LFP signal vs distance between sites for specific groups of pictures
19
Analysis excluding blank image and white boxes
data analysis exlucindg blank image and white boxes
20
Latencies
MUA response latencies
LFP response latencies
21
Responses for all sites within a penetration
MUA responses for sites within a penetration
LFP responses for sites within a penetration
22
Firing rate and comparison of spikes and LFPs
Correlation between firing rate and covariation of LFP and MUA
22
Correlation with basic image properties
Correlation between neural responses and basic image properties
23
Pseudolayers 1
threshold = 500 um
24
Pseudolayers 2
threshold = 750 um
25
Pseudolayers 3
threshold = 1000 um
26
Pseudolayers 3
LFP responses and principal components
27
LFP power spectrum
none
none
LFP power versus frequency band
28
Within group selectivity 1
Within group selectivity (SUA)
Within group selectivity (MUA)
Within group selectivity (LFP)
29
Within group selectivity 2
Summary
Summary
Summary
30
Model: LFP versus average spiking response
Comparison of LFP signal versus average MUA around the electrode
31
Monkeys, hemispheres, etc.
Comparison between monkeys and between hemispheres
32
Sharpness of responses
Sharpness of MUA responses versus sharpness of LFP responses
33
Scale and position invariance for LFPs
gk, last
updated:
10-May-05
kreiman@mit.edu
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