Auditory contrast gain control predicts perceptual performance and is not dependent on cortical activity
Autor: | Andrew J. King, Victoria M. Bajo, Ben D. B. Willmore, Michael Lohse |
---|---|
Jazyk: | angličtina |
Rok vydání: | 2021 |
Předmět: |
0303 health sciences
Computer science media_common.quotation_subject Thalamus Neural adaptation Adaptation (eye) Sensory system Midbrain 03 medical and health sciences 0302 clinical medicine medicine.anatomical_structure Perception medicine Contrast (vision) Auditory system 10. No inequality Neuroscience 030217 neurology & neurosurgery Perceptual adaptation 030304 developmental biology media_common |
Popis: | Neural adaptation enables sensory information to be represented optimally in the brain despite large fluctuations over time in the statistics of the environment. Auditory contrast gain control represents an important example, which is thought to arise primarily from cortical processing. We find, however, that neurons in both the auditory thalamus and midbrain of mice show robust contrast gain control, and that this is implemented independently of cortical activity. Although neurons at each level exhibit contrast gain control to similar degrees, adaptation time constants become longer at later stages of the processing hierarchy, resulting in progressively more stable representations. We also show that auditory discrimination thresholds in human listeners compensate for changes in contrast, and that the strength of this perceptual adaptation can be predicted from physiological measurements. Contrast adaptation is therefore a robust property of both the subcortical and cortical auditory system and accounts for the short-term adaptability of perceptual judgments. |
Databáze: | OpenAIRE |
Externí odkaz: |