Document Detail


The predictability of frequency-altered auditory feedback changes the weighting of feedback and feedforward input for speech motor control.
MedLine Citation:
PMID:  25263844     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Speech production requires the combined effort of a feedback control system driven by sensory feedback, and a feedforward control system driven by internal models. However, the factors that dictate the relative weighting of these feedback and feedforward control systems are unclear. In this event-related potential (ERP) study, participants produced vocalisations while being exposed to blocks of frequency-altered feedback (FAF) perturbations that were either predictable in magnitude (consistently either 50 or 100 cents) or unpredictable in magnitude (50- and 100-cent perturbations varying randomly within each vocalisation). Vocal and P1-N1-P2 ERP responses revealed decreases in the magnitude and trial-to-trial variability of vocal responses, smaller N1 amplitudes, and shorter vocal, P1 and N1 response latencies following predictable FAF perturbation magnitudes. In addition, vocal response magnitudes correlated with N1 amplitudes, vocal response latencies, and P2 latencies. This pattern of results suggests that after repeated exposure to predictable FAF perturbations, the contribution of the feedforward control system increases. Examination of the presentation order of the FAF perturbations revealed smaller compensatory responses, smaller P1 and P2 amplitudes, and shorter N1 latencies when the block of predictable 100-cent perturbations occurred prior to the block of predictable 50-cent perturbations. These results suggest that exposure to large perturbations modulates responses to subsequent perturbations of equal or smaller size. Similarly, exposure to a 100-cent perturbation prior to a 50-cent perturbation within a vocalisation decreased the magnitude of vocal and N1 responses, but increased P1 and P2 latencies. Thus, exposure to a single perturbation can affect responses to subsequent perturbations.
Authors:
Nichole E Scheerer; Jeffery A Jones
Related Documents :
1622314 - Biomechanical analysis of the sit-to-stand motion in elderly persons.
16084204 - Influence of an asymmetrical body weight distribution on the control of undisturbed upr...
9108214 - Coupling of fingertip somatosensory information to head and body sway.
19717674 - Preparing for escape: anti-predator posture and fast-start performance in gobies.
20562824 - Morphological descriptions of second and third instar larvae of hypopygiopsis violacea ...
20141054 - The influence of low-frequency magnetic field on plasma antioxidant capacity and heart ...
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2014-9-27
Journal Detail:
Title:  The European journal of neuroscience     Volume:  -     ISSN:  1460-9568     ISO Abbreviation:  Eur. J. Neurosci.     Publication Date:  2014 Sep 
Date Detail:
Created Date:  2014-9-29     Completed Date:  -     Revised Date:  2014-9-30    
Medline Journal Info:
Nlm Unique ID:  8918110     Medline TA:  Eur J Neurosci     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
© 2014 Federation of European Neuroscience Societies and John Wiley & Sons Ltd.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:

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


Previous Document:  The evolutionary ecology of C4 plants.
Next Document:  Highly Selective and Sensitive Near-Infrared-Fluorescent Probes for the Detection of Cellular Hydrog...