Velocity Selective Networks in Human Cortex Reveal Two Functionally Distinct Auditory Motion Systems
The auditory system encounters motion cues through an acoustic object’s movement or rotation of the listener’s head in a stationary sound field, generating a wide range of naturally occurring velocities from a few to several hundred degrees per second. The angular velocity of moving acoustic objects...
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Public Library of Science
2016
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| Online Access: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4905637/ |
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pubmed-49056372016-06-28 Velocity Selective Networks in Human Cortex Reveal Two Functionally Distinct Auditory Motion Systems Meng, Jhao-An Saberi, Kourosh Hsieh, I-Hui Research Article The auditory system encounters motion cues through an acoustic object’s movement or rotation of the listener’s head in a stationary sound field, generating a wide range of naturally occurring velocities from a few to several hundred degrees per second. The angular velocity of moving acoustic objects relative to a listener is typically slow and does not exceed tens of degrees per second, whereas head rotations in a stationary acoustic field may generate fast-changing spatial cues in the order of several hundred degrees per second. We hypothesized that these two types of systems (i.e., encoding slow movements of an object or fast head rotations) may engage functionally distinct substrates in processing spatially dynamic auditory cues, with the latter potentially involved in maintaining perceptual constancy in a stationary field during head rotations and therefore possibly involving corollary-discharge mechanisms in premotor cortex. Using fMRI, we examined cortical response patterns to sound sources moving at a wide range of velocities in 3D virtual auditory space. We found a significant categorical difference between fast and slow moving sounds, with stronger activations in response to higher velocities in the posterior superior temporal regions, the planum temporale, and notably the premotor ventral-rostral (PMVr) area implicated in planning neck and head motor functions. Public Library of Science 2016-06-13 /pmc/articles/PMC4905637/ /pubmed/27294673 http://dx.doi.org/10.1371/journal.pone.0157131 Text en © 2016 Meng et al http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. |
| repository_type |
Open Access Journal |
| institution_category |
Foreign Institution |
| institution |
US National Center for Biotechnology Information |
| building |
NCBI PubMed |
| collection |
Online Access |
| language |
English |
| format |
Online |
| author |
Meng, Jhao-An Saberi, Kourosh Hsieh, I-Hui |
| spellingShingle |
Meng, Jhao-An Saberi, Kourosh Hsieh, I-Hui Velocity Selective Networks in Human Cortex Reveal Two Functionally Distinct Auditory Motion Systems |
| author_facet |
Meng, Jhao-An Saberi, Kourosh Hsieh, I-Hui |
| author_sort |
Meng, Jhao-An |
| title |
Velocity Selective Networks in Human Cortex Reveal Two Functionally Distinct Auditory Motion Systems |
| title_short |
Velocity Selective Networks in Human Cortex Reveal Two Functionally Distinct Auditory Motion Systems |
| title_full |
Velocity Selective Networks in Human Cortex Reveal Two Functionally Distinct Auditory Motion Systems |
| title_fullStr |
Velocity Selective Networks in Human Cortex Reveal Two Functionally Distinct Auditory Motion Systems |
| title_full_unstemmed |
Velocity Selective Networks in Human Cortex Reveal Two Functionally Distinct Auditory Motion Systems |
| title_sort |
velocity selective networks in human cortex reveal two functionally distinct auditory motion systems |
| description |
The auditory system encounters motion cues through an acoustic object’s movement or rotation of the listener’s head in a stationary sound field, generating a wide range of naturally occurring velocities from a few to several hundred degrees per second. The angular velocity of moving acoustic objects relative to a listener is typically slow and does not exceed tens of degrees per second, whereas head rotations in a stationary acoustic field may generate fast-changing spatial cues in the order of several hundred degrees per second. We hypothesized that these two types of systems (i.e., encoding slow movements of an object or fast head rotations) may engage functionally distinct substrates in processing spatially dynamic auditory cues, with the latter potentially involved in maintaining perceptual constancy in a stationary field during head rotations and therefore possibly involving corollary-discharge mechanisms in premotor cortex. Using fMRI, we examined cortical response patterns to sound sources moving at a wide range of velocities in 3D virtual auditory space. We found a significant categorical difference between fast and slow moving sounds, with stronger activations in response to higher velocities in the posterior superior temporal regions, the planum temporale, and notably the premotor ventral-rostral (PMVr) area implicated in planning neck and head motor functions. |
| publisher |
Public Library of Science |
| publishDate |
2016 |
| url |
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4905637/ |
| _version_ |
1613593809683218432 |