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Optogenetic Stimulation of the Auditory Nerve
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Optogenetically induced low-frequency correlations impair perception.

Anirvan Nandy1,2, Jonathan J Nassi1, Monika P Jadi2,3

  • 1Systems Neurobiology Laboratories, The Salk Institute for Biological Studies, La Jolla, United States.

Elife
|February 23, 2019
PubMed
Summary
This summary is machine-generated.

Covert attention reduces neural noise, enhancing sensory processing. Inducing neural fluctuations impairs performance, supporting the role of reduced neural variability in attention-mediated perception.

Keywords:
Optogeneticscorrelationsneurosciencerhesus macaquevisual attention

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Area of Science:

  • Neuroscience
  • Systems Neuroscience
  • Perception

Background:

  • Covert attention deployment decreases low-frequency correlated variability in macaque area V4 neurons.
  • This reduction is hypothesized to significantly contribute to attention-mediated sensory processing improvements.
  • Previous conclusions rely on decoding assumptions and the hypothetical link between correlated variability and perception impairment.

Purpose of the Study:

  • To directly test the hypothesis that correlated neural variability impairs perception.
  • To investigate the causal role of low-frequency neural fluctuations in attention-demanding tasks.

Main Methods:

  • Optogenetically inducing low-frequency fluctuations in neurons in area V4 of macaque monkeys.
  • Assessing the impact of these induced fluctuations on performance in a fine sensory discrimination task.
  • Comparing the effects of low-frequency stimulation with higher-frequency stimulation.

Main Results:

  • Low-frequency optical stimulation of V4 neurons increased correlations between neuronal pairs.
  • This low-frequency stimulation impaired the animals' fine sensory discrimination abilities.
  • Higher-frequency stimulation did not impair performance, despite similar modulation of neuronal responses.

Conclusions:

  • The findings support the hypothesis that attention-driven reductions in correlated neural variability enhance perception.
  • Reduced correlated variability is causally linked to improved sensory discrimination under attention.
  • This study provides direct evidence for the functional role of neural noise reduction in attention.