Post on 13-Jan-2016
Karlijn van Aerde
Two independent cortical subnetworks control spike timing of layer 5 pyramidal neurons
during dynamic β oscillation shifts
Karlijn van Aerde et al, VU University Amsterdam
Fast network oscillations (beta range) are dynamic!
- in rat brain slices
- in awake rats
- in human EEG
What is the underlying network? Or should I say… networks!
Adrien Peyrache
Time Course of Reactivation in the Prefrontal cortexAdrien Peyrache, K. Benchenane, S Wiener, F Battaglia
Arrival
Sleep PRE
Sleep POSTTime (s)
Time (s)
Fre
qu
en
cy
(H
z)F
req
ue
nc
y (
Hz)
Recordings
LFP
Recordings
LFP, Spikes
PFCHippocampus
Sleep POST
Sleep PRE
1st PC
coefficient
delta/spindles events
freq
uen
cy (
Hz)
reactivation
measu
reHippocampal
filtered LFP
(100-300 Hz)
cells ensemble
activity
Iris Grothe
Attentional modulation of coherence between monkey area V1 and V4
Iris GrotheBernstein Group for Computational Neurosciences BremenGermany
160
117
85
62
45
33
24
18
0 2 4 6 0 2
160
117
85
62
45
33
24
18
0.25
0.20
0.15
0.10
0.05
0.25
0
0.0005
0.005
0.05
0.5
0
160
117
85
62
45
33
24
18
0 2 4 6Time (s)
Fre
quen
cy (
Hz)
Coherence P-value
Attentional modulation of coherence between monkey area V1 and V4
Iris GrotheBernstein Group for Computational Neurosciences BremenGermany
Alexander Hanuschkin
Magteld Zeitler
Michiel Remme
Paolo Bonifazi
0 40002000 300010000
0.2
0.4
0
100
200
Frac
tion
Cell
(#)
Time (frames)
IDENTIFICATION OF CELLULAR NETWORK HUBS DRIVING OSCILLATIONS IN THE DEVELOPING HIPPOCAMPUS
0
50
100
150
200
970 975 980 985 990 995 10000
0.2
0.4
Recording and “perturbation” of cells partecipating in build up of network synchrony
Frac
tion
of c
ells
0
0.05
0.1
0.15
0.2
0 pA
+40 pA
-75 mV-45 mV
Cell-network interaction
200 µm
oo
200 µm
Morphology
Perturbating Not perturbating
Network topology(based on functional connectivity)
P. Bonifazi - M. GoldinY. Ben-AriR. Cossart
INMED, Marseille (France)
David Chik
Synchronization model Synchronization model of multi-stable of multi-stable perceptions perceptions
Saskia Haegens
Oscillatory brain activity during human somatosensory working memory maintenance
What is the role of primary and secondary sensory regions in working memory?Which oscillations are involved?
MEG, median nerve stimulation, delayed-match-to-sample task:
SII
SI
Primary somatosensory cortex (SI)
Saskia HaegensF.C. Donders Centre for Cognitive Neuroimaging
April 21, 2023
Oscillatory brain activity during human somatosensory working memory maintenance
alpha ↑
alpha ↓
gamma ↑
gamma ↑
gamma ↑
Main conclusions: Sustained gamma band activity reflects working memory maintenance;
first in SI and then bilaterally in SII. Alpha band activity reflects functional inhibition of task-irrelevant regions.