Efficiency of rate and latency coding with respect to metabolic cost and time. (November 2017)

• Record Type: Journal Article
• Authors: Levakova, Marie
• Is Part Of: Bio systems. Volume 161(2017)
• Page Start: 31
• Page End: 40
• Publication Date: 2017-11
• Subjects: Rate coding -- Temporal coding -- Metabolic cost -- Fisher information; Biological systems -- Periodicals; Biology -- Periodicals; Biology -- Periodicals; Evolution -- Periodicals; Biologie -- Périodiques; Évolution -- Périodiques; 570
• DOI: 10.1016/j.biosystems.2017.06.005
• Languages: English
• ISSNs: 0303-2647

Abstract

Abstract: Recent studies on the theoretical performance of latency and rate code in single neurons have revealed that the ultimate accuracy is affected in a nontrivial way by aspects such as the level of spontaneous activity of presynaptic neurons, amount of neuronal noise or the duration of the time window used to determine the firing rate. This study explores how the optimal decoding performance and the corresponding conditions change when the energy expenditure of a neuron in order to spike and maintain the resting membrane potential is accounted for. It is shown that a nonzero amount of spontaneous activity remains essential for both the latency and the rate coding. Moreover, the optimal level of spontaneous activity does not change so much with respect to the intensity of the applied stimulus. Furthermore, the efficiency of the temporal and the rate code converge to an identical finite value if the neuronal activity is observed for an unlimited period of time.