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123-10123-10123

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Lag (ms)

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100 msec
FIG.

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LFP

unit

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http://asablog05.exblog.jp/11440189

1.

ing oscillat
passed thr
pulses. Th
inter-trigger
tory episodfrom 50 m
nated asnated outs

spikes duringoscill .ations

Murthy, Fetz, 1996

spikes outside
oscillations

and 2) the time difference between the peak and the closest LFP
negativity; and, when histograms had multiple peaks, 3) frequencyof oscillation(d/2n)
and 4) decay constant of Gabor function
divided by the period of oscillation (d/2rb),
which measured thedegree of periodic oscillations in the histograms.
The CCHs were calculated with a binwidth of 0.5 or 1 ms, for 125ms periods before and after thereference spikes from one of the electrodes. To determine the correlation between units specifically during the oscillatory episodes,
we compiled “oscillation-selectedCCHs” ( OS-CCHs) using only
CROSS-CORRELATIONS.

episode was calculated
frequency following thRESULTS

We recorded 134
9 pairs from monkeys
ally (all from monkey
which exhibited parti
us to compare sync

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Alpha (7-13Hz)…inhibition of irrelevant factors

distance

σ ~ 0.3-0.4Sm-1Klimesch,2012

Beta (13-30Hz)…sensorimotor transmission

Roux,Uhlhaas,2014

Kilavik et al.,2013

Gamma (30-100Hz)…sensory modality specific, attention

transmembrane currentreturn current

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Expansion

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Rightward
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Leftward
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1 2 PMROAC VγhzPeri-Sample Sample
Onset
Cue

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Start-400~-100ms
100~600ms
from Sample On

600~1100ms-900~-400ms
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100~600ms

600~1100ms

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2.4

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2.4

sink
-2.4

800μm

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From Rao, Williams, GoldmanRakic, 1999

Sample On
250ms

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Sakamoto K, Kawaguchi N, Yagi K, Mushiake H. 2015. Spatiotemporal patterns ofcurrent source density in the prefrontal cortex of a behaving monkey. Neural Networks
62:67-73.
Sakamoto K, Kawaguchi N, Yagi K, Matsuzaka Y, Katayama N, Tanaka T, Mushiake H.
2014. Current sink and source patterns in the prefrontal cortex of a behaving monkey.
International Symposium on Nonlinear Theory and its Applications. C1L-D1.
Sakamoto K, Katori Y, Saito N, Yoshida S, Aihara K, Mushiake H. 2013. Increased firing
irregularity as an emergent property of neural-state transition in monkey prefrontal cortex.
PlosONE 8:e80906.
Katori Y, Sakamoto K, Saito N, Tanji J, Mushiake H, Aihara K. 2011. Representational
Switching by Dynamical Reorganization of Attractor Structure in a Network Model of thePrefrontal Cortex. PLoS Comput Biol 7:e1002266.
Sakamoto K, Mushiake H, Saito N, Aihara K, Yano M, Tanji J. 2008. Discharge
synchrony during the transition of behavioral-goal representations encoded by discharge
rates of prefrontal neurons. Cereb. Cortex 18:2036-2045.

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