Document Detail

Statistics of the Vestibular Input Experienced during Natural Self-Motion: Implications for Neural Processing.
MedLine Citation:
PMID:  24920638     Owner:  NLM     Status:  In-Data-Review    
It is widely believed that sensory systems are optimized for processing stimuli occurring in the natural environment. However, it remains unknown whether this principle applies to the vestibular system, which contributes to essential brain functions ranging from the most automatic reflexes to spatial perception and motor coordination. Here we quantified, for the first time, the statistics of natural vestibular inputs experienced by freely moving human subjects during typical everyday activities. Although previous studies have found that the power spectra of natural signals across sensory modalities decay as a power law (i.e., as 1/f(α)), we found that this did not apply to natural vestibular stimuli. Instead, power decreased slowly at lower and more rapidly at higher frequencies for all motion dimensions. We further establish that this unique stimulus structure is the result of active motion as well as passive biomechanical filtering occurring before any neural processing. Notably, the transition frequency (i.e., frequency at which power starts to decrease rapidly) was lower when subjects passively experienced sensory stimulation than when they actively controlled stimulation through their own movement. In contrast to signals measured at the head, the spectral content of externally generated (i.e., passive) environmental motion did follow a power law. Specifically, transformations caused by both motor control and biomechanics shape the statistics of natural vestibular stimuli before neural processing. We suggest that the unique structure of natural vestibular stimuli will have important consequences on the neural coding strategies used by this essential sensory system to represent self-motion in everyday life.
Jérome Carriot; Mohsen Jamali; Maurice J Chacron; Kathleen E Cullen
Related Documents :
22974278 - From block clearance to sprint running: characteristics underlying an effective transit...
12715118 - Conduction velocity is inversely related to action potential threshold in rat motoneuro...
23247058 - Measurements of three-dimensional shape and sound-induced motion of the chinchilla tymp...
23599418 - The "motion silencing" illusion results from global motion and crowding.
24509728 - Factors affecting photoreactivation in uvb-irradiated herbivorous spider mite (tetranyc...
16938978 - Use of stimulus-frequency otoacoustic emission latency and level to investigate cochlea...
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The Journal of neuroscience : the official journal of the Society for Neuroscience     Volume:  34     ISSN:  1529-2401     ISO Abbreviation:  J. Neurosci.     Publication Date:  2014 Jun 
Date Detail:
Created Date:  2014-06-12     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8102140     Medline TA:  J Neurosci     Country:  United States    
Other Details:
Languages:  eng     Pagination:  8347-57     Citation Subset:  IM    
Copyright Information:
Copyright © 2014 the authors 0270-6474/14/348347-11$15.00/0.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Previous Document:  CNS amyloid-?, soluble APP-? and -? kinetics during BACE inhibition.
Next Document:  Specialized postsynaptic morphology enhances neurotransmitter dilution and high-frequency signaling ...