[Home ] [Archive]    
:: Main :: About :: Current Issue :: Archive :: Search :: Submit :: Contact ::
:: Volume 3, Issue 4 (March 2006) ::
Int J Radiat Res 2006, 3(4): 191-194 Back to browse issues page
An fMRI study of human visual cortex in response to spatiotemporal properties of visual stimuli
A. Mirzajani , N. Riyahi-Alam, M.A. Oghabian, K. Firuznia, H. Saberi
, mirzajani@sina.tums.ac.ir
Abstract:   (10271 Views)

  ABSTRACT

 Background: The brain response to temporal frequencies (TF) has been already reported, but with no study reported for different TF with respect to various spatial frequencies (SF).

 Materials and Methods: fMRI was performed by 1.5T GE-system in 14 volunteers during checkerboard, with TFs of 4, 6, 8 and 10Hz in low and high SFs of 0.5 and 8cpd.

 Results: Average percentage BOLD signal change demonstrated the amplitude of the fMRI response to different TFs was maximal in 6Hz for high SF of 8cpd, while, it was maximal at TF of 8Hz for low SF of 0.5cpd.

 Conclusion: The results are useful for vision therapy (such as the treatment of Amblyopia) and visual task selecting in fMRI studies.

Keywords: Spatial frequency, cortical response, temporal frequency, human, fMRI
Full-Text [PDF 76 kb]   (3036 Downloads)    
Type of Study: Original Research | Subject: Medical Physics
Send email to the article author

Add your comments about this article
Your username or Email:

CAPTCHA


XML     Print


Download citation:
BibTeX | RIS | EndNote | Medlars | ProCite | Reference Manager | RefWorks
Send citation to:

A. Mirzajani, N. Riyahi-Alam, M.A. Oghabian, K. Firuznia, H. Saberi. An fMRI study of human visual cortex in response to spatiotemporal properties of visual stimuli. Int J Radiat Res. 2006; 3 (4) :191-194
URL: http://ijrr.com/article-1-192-en.html


Rights and permissions
Creative Commons License This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
Volume 3, Issue 4 (March 2006) Back to browse issues page
International Journal of Radiation Research
Persian site map - English site map - Created in 0.04 seconds with 32 queries by YEKTAWEB 4410