| Implied Motion Activation in Cortical Area MT Can Be Explained by Visual Low-level Features. | |
| | |
MedLine Citation:
|
PMID: 20617893 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
|
To investigate form-related activity in motion-sensitive cortical areas, we recorded cell responses to animate implied motion in macaque middle temporal (MT) and medial superior temporal (MST) cortex and investigated these areas using fMRI in humans. In the single-cell studies, we compared responses with static images of human or monkey figures walking or running left or right with responses to the same human and monkey figures standing or sitting still. We also investigated whether the view of the animate figure (facing left or right) that elicited the highest response was correlated with the preferred direction for moving random dot patterns. First, figures were presented inside the cell's receptive field. Subsequently, figures were presented at the fovea while a dynamic noise pattern was presented at the cell's receptive field location. The results show that MT neurons did not discriminate between figures on the basis of the implied motion content. Instead, response preferences for implied motion correlated with preferences for low-level visual features such as orientation and size. No correlation was found between the preferred view of figures implying motion and the preferred direction for moving random dot patterns. Similar findings were obtained in a smaller population of MST cortical neurons. Testing human MT+ responses with fMRI further corroborated the notion that low-level stimulus features might explain implied motion activation in human MT+. Together, these results suggest that prior human imaging studies demonstrating animate implied motion processing in area MT+ can be best explained by sensitivity for low-level features rather than sensitivity for the motion implied by animate figures. |
| | |
Authors:
|
Jeannette A M Lorteije; Nick E Barraclough; Tjeerd Jellema; Mathijs Raemaekers; Jacob Duijnhouwer; Dengke Xiao; Mike W Oram; Martin J M Lankheet; David I Perrett; Richard J A van Wezel |
Related Documents
:
|
2288083 - The processing of object and self-motion in the tectofugal and accessory optic pathways... 17050823 - Space-time relativity in self-motion reproduction. 17945643 - Frequency tracking of atrial fibrillation using hidden markov models. |
Publication Detail:
|
Type: Journal Article Date: 2010-07-09 |
Journal Detail:
|
Title: Journal of cognitive neuroscience Volume: 23 ISSN: 1530-8898 ISO Abbreviation: J Cogn Neurosci Publication Date: 2011 Jun |
Date Detail:
|
Created Date: 2011-04-01 Completed Date: - Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 8910747 Medline TA: J Cogn Neurosci Country: United States |
Other Details:
|
Languages: eng Pagination: 1533-48 Citation Subset: IM |
Affiliation:
|
Utrecht University, The Netherlands. |
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: Spaced learning enhances subsequent recognition memory by reducing neural repetition suppression.
Next Document: Flexible fiberoptic bronchoscopy ? a bedside technique for neonatologists.