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Background gamma rhythmicity and attention in cortical local circuits: a computational study.
- C. Börgers, S. Epstein, N. Kopell
- Biology, PsychologyProceedings of the National Academy of Sciences…
- 10 May 2005
A simple computational model is described that links cholinergic neuromodulation, gamma rhythmicity, and attentional selection and suggests that such rhythms accompany states of preparatory attention or vigilance and report simulations demonstrating that their presence can amplify stimulus-specific responses and enhance stimulus competition within a local circuit.
Gamma oscillations mediate stimulus competition and attentional selection in a cortical network model
- C. Börgers, S. Epstein, N. Kopell
- Biology, PsychologyProceedings of the National Academy of Sciences
- 18 November 2008
Computational results are described suggesting how this remarkable effect may arise from strong excitatory drive to a substantial local population of fast-spiking inhibitory interneurons, which can lead to a loss of coherence in that population and thereby raise the effectiveness of inhibition.
Behaviour and Motor Output for an Insect Walking on a Slippery Surface: II. Backward Walking
Fast motor output appeared to be superimposed on the forward walking motor pattern to produce the movements required for backward walking in this insect.
Behaviour and Motor Output of Stick Insects Walking on a Slippery Surface: I. Forward Walking
The walking coordination and motor output of intact adult stick insects was examined when they were supported above an oiled glass surface and found that under these conditions an individual leg moved much more slowly than its neighbours, producing 2:1 coordination patterns.
Representation of Time-Varying Stimuli by a Network Exhibiting Oscillations on a Faster Time Scale
It is found that resetting of the oscillation phase at stimulus onset is important for a reliable representation of the stimulus and that there is a tradeoff between the resolution of the neural representation ofThe stimulus and robustness to time-warp.
Peripheral Influences on the Movement of the Legs in a Walking Insect Carausius Morosus
The results suggest the hypothesis of a position-dependent threshold value for protraction which is modulated by co-ordinating influences from other legs.
Network Oscillations Generated by Balancing Graded Asymmetric Reciprocal Inhibition in Passive Neurons
- Y. Manor, F. Nadim, S. Epstein, J. Ritt, E. Marder, N. Kopell
- BiologyThe Journal of Neuroscience
- 1 April 1999
A novel mechanism by which network oscillations can arise from reciprocal inhibitory connections between two entirely passive neurons is described, which arises because the graded reciprocal synapses create the equivalent of a negative-slope conductance region in theI–V curves for the cells.
Acid base, electrolyte, glucose, and lactate values during cardiopulmonary resuscitation in dogs and cats.
- K. Hopper, A. Borchers, S. Epstein
- MedicineJournal of veterinary emergency and critical care
- 1 March 2014
Biochemical abnormalities including metabolic acidosis, hyperkalemia, ionized hypocalcemia, hypoglycemia and hyperglycemia can be identified during CPR and immediately following ROSC.
Medialis dorsalis thalamic responses masked in the background activity: a statistical analysis of spike discharge.
Entrainment of a slow neuronal oscillator by a fast one
This work has shown that the interplay of oscillators with considerably different time scale periods has an important role in the regulation of rhythmic activity of neurons.