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Envelope statistics of self-motion signals experienced by human subjects during everyday activities: Implications for vestibular processing
- Source :
- PLoS ONE, PLoS ONE, Vol 12, Iss 6, p e0178664 (2017)
- Publication Year :
- 2017
- Publisher :
- Public Library of Science (PLoS), 2017.
-
Abstract
- There is accumulating evidence that the brain's neural coding strategies are constrained by natural stimulus statistics. Here we investigated the statistics of the time varying envelope (i.e. a second-order stimulus attribute that is related to variance) of rotational and translational self-motion signals experienced by human subjects during everyday activities. We found that envelopes can reach large values across all six motion dimensions (~450 deg/s for rotations and ~4 G for translations). Unlike results obtained in other sensory modalities, the spectral power of envelope signals decreased slowly for low (< 2 Hz) and more sharply for high (>2 Hz) temporal frequencies and thus was not well-fit by a power law. We next compared the spectral properties of envelope signals resulting from active and passive self-motion, as well as those resulting from signals obtained when the subject is absent (i.e. external stimuli). Our data suggest that different mechanisms underlie deviation from scale invariance in rotational and translational self-motion envelopes. Specifically, active self-motion and filtering by the human body cause deviation from scale invariance primarily for translational and rotational envelope signals, respectively. Finally, we used well-established models in order to predict the responses of peripheral vestibular afferents to natural envelope stimuli. We found that irregular afferents responded more strongly to envelopes than their regular counterparts. Our findings have important consequences for understanding the coding strategies used by the vestibular system to process natural second-order self-motion signals.
- Subjects :
- Male
0301 basic medicine
Velocity
Motion Perception
lcsh:Medicine
Audiology
Power law
0302 clinical medicine
Animal Cells
Activities of Daily Living
lcsh:Science
Neurons
Vestibular system
Physics
Coding Mechanisms
Signal processing
Multidisciplinary
Classical Mechanics
Signal Filtering
Head Movements
Physical Sciences
Engineering and Technology
Female
Cellular Types
Neural coding
Research Article
Adult
medicine.medical_specialty
Rotation
Movement
Acceleration
Models, Neurological
Stimulus (physiology)
Motion
Young Adult
03 medical and health sciences
Stimulus modality
medicine
Humans
Motion perception
Computational Neuroscience
Behavior
Afferent Pathways
Quantitative Biology::Neurons and Cognition
Proprioception
Spectrum Analysis
lcsh:R
Biology and Life Sciences
Computational Biology
Afferent Neurons
Cell Biology
Probability Theory
Probability Distribution
030104 developmental biology
Cellular Neuroscience
Signal Processing
lcsh:Q
Neuroscience
Mathematics
030217 neurology & neurosurgery
Subjects
Details
- ISSN :
- 19326203
- Volume :
- 12
- Database :
- OpenAIRE
- Journal :
- PLOS ONE
- Accession number :
- edsair.doi.dedup.....b2e6e03df0cb5dcc0ba2f05f5fd3acd3