scholarly journals Inferring neural coding strategies from adaptation aftereffects

2019 ◽  
Vol 19 (10) ◽  
pp. 6d
Author(s):  
Kara Emery
Keyword(s):  
Neural Coding ◽  
Coding Strategies

scholarly journals Neural coding strategies and mechanisms of competition

2004 ◽  
Vol 5 (2) ◽  
pp. 93-117 ◽  
Author(s):  
M.W. Spratling ◽  
M.H. Johnson
Keyword(s):  
Neural Coding ◽  
Coding Strategies

Local versus distributed: A poor taxonomy of neural coding strategies

2004 ◽  
Vol 27 (5) ◽  
pp. 700-702
Author(s):  
Michael W. Spratling
Keyword(s):  
Neural Coding ◽  
Neural Representation ◽  
Target Article ◽  
Coding Strategies

Page is to be congratulated for challenging some misconceptions about neural representation. However, his target article, and the commentaries to it, highlight that the terms “local” and “distributed” are open to misinterpretation. These terms provide a poor description of neural coding strategies and a better taxonomy might resolve some of the issues.

scholarly journals Electrosensory processing in Apteronotus albifrons: implications for general and specific neural coding strategies across wave-type weakly electric fish species

2016 ◽  
Vol 116 (6) ◽  
pp. 2909-2921 ◽  
Author(s):  
Diana Martinez ◽  
Michael G. Metzen ◽  
Maurice J. Chacron
Keyword(s):  
Fish Species ◽  
Related Species ◽  
Neural Coding ◽  
Electric Fish ◽  
Weakly Electric Fish ◽  
Closely Related Species ◽  
Tuning Curves ◽  
Baseline Activity ◽  
Coding Strategies ◽  
Weakly Electric

Understanding how the brain processes sensory input to generate behavior remains an important problem in neuroscience. Towards this end, it is useful to compare results obtained across multiple species to gain understanding as to the general principles of neural coding. Here we investigated hindbrain pyramidal cell activity in the weakly electric fish Apteronotus albifrons. We found strong heterogeneities when looking at baseline activity. Additionally, ON- and OFF-type cells responded to increases and decreases of sinusoidal and noise stimuli, respectively. While both cell types displayed band-pass tuning, OFF-type cells were more broadly tuned than their ON-type counterparts. The observed heterogeneities in baseline activity as well as the greater broadband tuning of OFF-type cells were both similar to those previously reported in other weakly electric fish species, suggesting that they constitute general features of sensory processing. However, we found that peak tuning occurred at frequencies ∼15 Hz in A. albifrons, which is much lower than values reported in the closely related species Apteronotus leptorhynchus and the more distantly related species Eigenmannia virescens. In response to stimuli with time-varying amplitude (i.e., envelope), ON- and OFF-type cells displayed similar high-pass tuning curves characteristic of fractional differentiation and possibly indicate optimized coding. These tuning curves were qualitatively similar to those of pyramidal cells in the closely related species A. leptorhynchus. In conclusion, comparison between our and previous results reveals general and species-specific neural coding strategies. We hypothesize that differences in coding strategies, when observed, result from different stimulus distributions in the natural/social environment.

scholarly journals Neural Coding Strategies for Event-Based Vision Data

2020 ◽  
Author(s):  
Shane Harrigan ◽  
Sonya Coleman ◽  
Dermot Kerr ◽  
Pratheepan Yogarajah ◽  
Zheng Fang ◽  
...  
Keyword(s):  
Neural Coding ◽  
Coding Strategies ◽  
Event Based

scholarly journals Task-specific sensory coding strategies matched to detection and discrimination behaviors in Apteronotus leptorhynchus

2017 ◽  
Author(s):  
K.M. Allen ◽  
G. Marsat
Keyword(s):  
General Principle ◽  
Neural Coding ◽  
Sensory Systems ◽  
Model Systems ◽  
Behavioral Performance ◽  
Sensory Coding ◽  
Apteronotus Leptorhynchus ◽  
Neural Codes ◽  
Coding Strategies ◽  
Behavioral Tasks

ABSTRACTAll sensory systems must reliably translate information about the environment into a neural code, mediating perception. The most relevant aspects of stimuli may change as behavioral context changes, making efficient encoding of information more challenging. Sensory systems must balance rapid detection of a stimulus with perception of fine details that enable discrimination between similar stimuli. We show that in a species of weakly electric fish, Apteronotus leptorhynchus, two coding strategies are employed for these separate behavioral tasks. Using communication signals produced in different contexts, we demonstrate a strong correlation between neural coding strategies and behavioral performance on a discrimination task. Extracellular recordings of pyramidal cells within the electrosensory lateral line lobe of alert fish show two distinct response patterns, either burst discharges with little variation between different signals of the same category, or a graded, heterogeneous response that contains enough information to discriminate between signals with slight variations. When faced with a discrimination-based task, the behavioral performance of the fish closely matches predictions based on coding strategy. Comparisons of these results with neural and behavioral responses observed in other model systems suggest that our study highlights a general principle in the way different neural codes are utilized in the sensory system.SIGNIFICANCE STATEMENTResearch relating the structure of stimuli to the response of sensory neurons has left us with a detailed understanding of how different neural codes can represent information. Although various aspects of neural responses have been related to perceptual abilities, general principles relating behavioral tasks to sensory coding strategies are lacking. A major distinction can be made between signals that must simply be detected versus stimuli that must also be finely discriminated and evaluated. We show that these two different perceptual tasks are systematically matched by distinct neural coding strategies and we argue that our study identifies a general principle that is observed in various sensory systems.Conflict of interest statementThe authors declare no competing financial interests.

Abstract P103: Aberrant Sympathetic Neural Recruitment Strategies During Exercise Pressor Reflex Activation In Postmenopausal Women

Hypertension ◽  
2020 ◽  
Vol 76 (Suppl_1) ◽  
Author(s):  
Leena N Shoemaker ◽  
Austin T Robinson ◽  
Joseph C Watso ◽  
Jody L Greaney ◽  
Megan M Wenner
Keyword(s):  
Blood Pressure ◽  
Sympathetic Nerve ◽  
Neural Coding ◽  
Sympathetic Nerve Activity ◽  
Physiological Stress ◽  
Burst Frequency ◽  
Nerve Activity ◽  
Age Related ◽  
Coding Strategies ◽  
Discharge Patterns

Age-related elevations in sympathetic nerve activity contribute to numerous deleterious consequences for cardiovascular health, particularly in postmenopausal women (PMW). Aging adversely affects aspects of sympathetic nervous system (SNS) coding to control blood pressure at rest and during physiological stress. Although PMW exhibit greater neural activity at rest, the underlying sympathetic discharge patterns, particularly during sympathoexcitation, remain unknown. This study aimed to test the hypothesis that PMW display aberrant neural coding strategies during physiological stress compared to young women (YW). Efferent muscle sympathetic nerve activity (microneurography) was measured at baseline and during the final minute of both 30% isometric handgrip (HG) and post-exercise ischemia (PEI) in five healthy YW (22 ± 2 y, 20 ± 4 kg/m 2 , mean blood pressure: 82 ± 7 mmHg) and five healthy PMW (60 ± 5 y, 23 ± 3 kg/m 2 , 87 ± 8 mmHg). Sympathetic action potential (AP) discharge patterns were examined using wavelet-based methodology. At baseline, PMW exhibited elevated integrated burst frequency (PMW 30 ± 10 vs YW 9 ± 3 bursts/min; p < 0.01) and increased AP firing (PMW 240 ± 117 vs YW 90 ± 64 APs/min, p = 0.04). Both groups had similar increases in integrated burst frequency during HG and PEI (p < 0.01 vs baseline). AP firing was elevated to a similar extent in both groups during HG (PMW Δ76 ± 60; YW Δ129 ± 146 APs/min; p < 0.01 vs baseline) and PEI (PMW Δ72 ± 51; YW Δ93 ± 64 APs/min; p < 0.01 vs baseline), with no change in the mean AP content per burst (p = 0.86). PMW had reduced recruitment of latent and larger AP subpopulations that were previously silent at baseline (group-by-condition interaction: p < 0.01), as evidenced by an increase in total AP clusters (binned according to peak-to-peak amplitude) during HG and PEI in YW (HG: Δ2 ± 1; PEI: Δ2 ± 2; both p ≤ 0.03 vs baseline) but not PMW (HG: Δ0 ± 1; PEI: Δ0 ± 1; both p ≥ 0.75 vs baseline). These preliminary data suggest that PMW display elevated resting sympathetic AP firing and aberrant reflex AP recruitment, such that the ability of the SNS to recruit subpopulations of previously silent axons during a sympathetic stressor is reduced in PWM compared to YW. These findings extend our knowledge of age-related neural coding strategies in women.

scholarly journals Neural coding strategies for extracting motion estimates from electrosensory contrast

2014 ◽  
Vol 15 (S1) ◽  
Author(s):  
Stephen E Clarke ◽  
Richard Naud ◽  
André Longtin ◽  
Leonard Maler
Keyword(s):  
Neural Coding ◽  
Coding Strategies

Neural coding strategies in auditory cortex

2007 ◽  
Vol 229 (1-2) ◽  
pp. 81-93 ◽  
Author(s):  
Xiaoqin Wang
Keyword(s):  
Auditory Cortex ◽  
Neural Coding ◽  
Coding Strategies

Plasticity of the neural coding metaphor: An unnoticed rhetoric in scientific discourse

2019 ◽  
Vol 42 ◽  
Author(s):  
Giulia Frezza ◽  
Pierluigi Zoccolotti
Keyword(s):  
Discourse Analysis ◽  
Neural Coding ◽  
Scientific Discourse ◽  
Convincing Argument ◽  
Unified View ◽  
Brain Behavior

Abstract The convincing argument that Brette makes for the neural coding metaphor as imposing one view of brain behavior can be further explained through discourse analysis. Instead of a unified view, we argue, the coding metaphor's plasticity, versatility, and robustness throughout time explain its success and conventionalization to the point that its rhetoric became overlooked.

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