| Hierarchy of direction-tuned motion adaptation in human visual cortex. | |
| | |
MedLine Citation:
|
PMID: 22219027 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
|
Prolonged exposure to a single direction of motion alters perception of subsequent static or dynamic stimuli and induces substantial changes in behaviors of motion-sensitive neurons, but it remains unclear about an origin of neural adaptation and neural correlates of perceptual consequences of motion adaptation in human brain. Using functional magnetic resonance imaging (fMRI), we measured motion adaptation tuning curves in a fine scale by probing changes in cortical activity after adaptation for a range of directions relative to the adapted direction. We found a clear dichotomy in tuning curve shape: cortical responses in early-tier visual areas reduced at around both the adapted and opposite direction, resulting in a bi-directional tuning curve, whereas response reduction in high-tier areas occurred only at around the adapted direction, resulting in a uni-directional tuning curve. We also found that the psychophysically measured adaptation tuning curves were uni-directional and best matched the cortical adaptation tuning curves in MT and MST. Our findings are compatible with, but not limited to, an interpretation in which direct impacts of motion adaptation occur in both uni-directional and bi-directional units in early visual areas, but its perceptual consequences are manifested in the population activity in MT and MST, which may inherit those direct impacts of adaptation from the directionally selective units. |
| | |
Authors:
|
Hyun Ah Lee; Sang-Hun Lee |
Related Documents
:
|
21611167 - The advantage of standing up to fight and the evolution of habitual bipedalism in homin... 21707827 - Differences in early dynamic connectivity between visual expansion and contraction stim... 22110977 - Validation of a biofeedback system for wheelchair propulsion training. 6288837 - Kinetics of oxygen consumption after a single flash of light in photoreceptors of the d... 4013727 - Frequency specificity of the auditory brainstem responses in the cat. 21184457 - Preharvest bagging with wavelength-selective materials enhances development and quality... |
Publication Detail:
|
Type: JOURNAL ARTICLE Date: 2012-1-4 |
Journal Detail:
|
Title: Journal of neurophysiology Volume: - ISSN: 1522-1598 ISO Abbreviation: - Publication Date: 2012 Jan |
Date Detail:
|
Created Date: 2012-1-5 Completed Date: - Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 0375404 Medline TA: J Neurophysiol Country: - |
Other Details:
|
Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
|
1Seoul National University. |
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: Expression and role in glycolysis of human ADP-dependent glucokinase.
Next Document: Contribution of axonal orientation to pathway-dependent modulation of excitatory transmission by dir...