Location of Repository

Decision time, slow inhibition, and theta rhythm

By Anteo Smerieri, Edmund T. Rolls and Jianfeng Feng

Abstract

In this paper, we examine decision making in a spiking neuronal network and show that longer time constants for the inhibitory neurons\ud can decrease the reaction times and produce theta rhythm.We analyze the mechanism and find that the spontaneous firing rate before the\ud decision cues are applied can drift, and thereby influence the speed of the reaction time when the decision cues are applied. The drift of the\ud firing rate in the population that will win the competition is larger if the time constant of the inhibitory interneurons is increased from 10\ud to 33 ms, and even larger if there are two populations of inhibitory neurons with time constants of 10 and 100 ms. Of considerable interest\ud is that the decision that will be made can be influenced by the noise-influenced drift of the spontaneous firing rate over many seconds\ud before the decision cues are applied. The theta rhythm associated with the longer time constant networks mirrors the greater integration\ud in the firing rate drift produced by the recurrent connections over long time periods in the networks with slow inhibition. The mechanism\ud for the effect of slow waves in the theta and delta range on decision times is suggested to be increased neuronal spiking produced by\ud depolarization of the membrane potential on the positive part of the slow waves when the neuron’s membrane potential is close to the\ud firing threshold

Topics: QP
Publisher: Society for Neuroscience
Year: 2010
OAI identifier: oai:wrap.warwick.ac.uk:4416

Suggested articles

Preview

Citations

  1. (2008). A neural coding scheme formed by the combined function of gamma and theta oscillations. doi
  2. (2006). A recurrent network mechanism of time integration in perceptual decisions. doi
  3. (2003). A recurrent network model of somatosensory parametric working memory in the prefrontal cortex. doi
  4. (2005). Amechanismforcognitivedynamics:neuronalcommunication through neuronal coherence.
  5. (2008). Associative learning of social value. doi
  6. (2006). Decision-making and Weber’s Law: a neurophysiological model. doi
  7. (2010). Diversity of intrinsic frequency encoding patterns in rat cortical neurons: mechanisms and possible functions. PLoS One 5:e9608. doi
  8. (2008). Dynamic cross-frequency couplings of local field potential oscillations in rat striatum and hippocampus during performance of a T-maze task. doi
  9. (2001). Effectsofneuromodulationinacorticalnetwork model of object working memory dominated by recurrent inhibition.
  10. (2008). Fromaffectivevaluetodecisionmaking in the prefrontal cortex.
  11. (2005). Global competition dictates local suppression in pattern rivalry. doi
  12. (2006). High gamma power is phase-locked to theta oscillations in human neocortex. doi
  13. (1954). Hippocampal electrical activity in arousal.
  14. (2009). How greenisthegrassontheotherside?Frontopolarcortexandtheevidencein favor of alternative courses of action. doi
  15. (2009). Learning alters theta-nested gamma oscillations in inferotemporal cortex. Nat Precedings. Available at http://hdl.handle.net/10101/npre.2009.3151.2. LansingRW
  16. (2006). Maintenance of multiple working memory items by temporal segmentation. doi
  17. (2008). Memory, attention, and decision-making: a unifying computational neuroscience approach.
  18. (2001). Modulation of oscillatory neuronal synchronization by selective visual attention. doi
  19. (2000). Networksofinterneurons with fast and slow gamma-aminobutyric acid type A (GABAA) kinetics provide substrate for mixed gamma-theta rhythm.
  20. (2007). On the formation of gamma-coherent cell assemblies by oriens lacunosummoleculare interneurons in the hippocampus. doi
  21. (2005). Phaselockingofsingle neuron activity to theta oscillations during working memory in monkey extrastriate visual cortex.
  22. (1965). Phaseofalphabrainwaves,reactiontimeand visually evoked potentials.
  23. (2002). Probabilisticdecisionmakingbyslowreverberationincortical circuits.
  24. (1952). Psychological phenomena and the electroencephalogram. doi
  25. (1960). Relationship between reaction time and electroencephalographic alpha phase. doi
  26. (2006). Rhythms of the brain. doi
  27. RomoR,Herna ´ndezA,ZainosA (2004) Neuronalcorrelatesofaperceptual decision in ventral premotor cortex.
  28. (1995). short-term memories in oscillatory subcycles. doi
  29. (1997). Stimulation on the positive phase ofhippocampalthetarhythminduceslong-termpotentiationthatcanbe depotentiated by stimulation on the negative phase in area CA1 in vivo.
  30. (2010). Synapticdynamicsanddecision-making.
  31. (1975). The magic number seven after fifteen years. In:
  32. (2009). The phase of ongoing EEG oscillations predicts visual perception. doi
  33. (2001). Themagicalnumber4inshort-termmemory:areconsiderationofmentalstoragecapacity.BehavBrainSci24:87–114;discussion 114–185.
  34. (2009). Theta-gamma coupling increases during the learning of item-context associations. doi
  35. (2002). Visual competition. doi

To submit an update or takedown request for this paper, please submit an Update/Correction/Removal Request.