The DOI matches its Crossref record; 3 of the 3 references it cites were found in a registry or an index.
4 Tesla gradient recalled echo characteristics of photic stimulation‐induced signal changes in the human primary visual cortex
Abstract
Multi‐echo measurements of photic stimulation‐induced signal changes in human visual cortex were made at 4 Tesla in order to quantify the nature of the signal change and its vascular origin, and to determine the optimum echo time for detection of the changes. Utilizing high resolution images, two distinct regions (ascribed to be microvasculature and visible venous vessels) were identified as giving rise to the signal increase. The fractional signal changes in gray matter areas depended linearly on echo time (TE) in the range of 10 to 60 ms and extrapolated to virtually zero for TE = 0, indicating that in‐flow effects secondary to stimulation‐induced blood flow increases were negligible in our functional imaging studies; instead, signal change due to photic stimulation originated from the increase in the apparent transverse relaxation rate, 1/T2*. This decrease in (1/T2*, brought about by the alterations in hemodynamic parameters, was 1.3 ± 0.4 s−1 for gray matter and 3.0 ± 0.7 s−1 (averaged over 10 individuals) for venous vessels visible in the images. The optimum choice of echo time was found to be TE ≥ T2*.
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Self-citationFox, P. T., & Raichle, M. E. (1986) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.83.4.1140 · Cited by 2,056
Nonoxidative Glucose Consumption During Focal Physiologic Neural Activity
Fox, P. T., Raichle, M. E., Mintun, M. A., & Dence, C. (1988) · Science · doi:10.1126/science.3260686 · Cited by 1,796
Cited by
A developmental functional MRI study of prefrontal activation during performance of a go-no-go task
Casey, B. J., Trainor, R. J., Orendi, J. L., Schubert, A. B., Nystrom, L. E., Giedd, J. N., Castellanos, F. X., Haxby, J. V., Noll, D. C., Cohen, J. D., et al. (1997) · Journal of Cognitive Neuroscience · doi:10.1162/jocn.1997.9.6.835 · Cited by 1,106
Uğurbil, K., Xu, J., Auerbach, E. J., Moeller, S., Vu, A. T., Duarte-Carvajalino, J. M., Lenglet, C., Wu, X., Schmitter, S., Van de Moortele, P. F., et al. (2013) · NeuroImage · doi:10.1016/j.neuroimage.2013.05.012 · Cited by 812
Self-citationFunctional magnetic resonance imaging of symptom provocation in obsessive-compulsive disorder
Breiter, H. C. (1996) · Archives of General Psychiatry · doi:10.1001/archpsyc.1996.01830070041008 · Cited by 626
Activation of the prefrontal cortex in a nonspatial working memory task with functional MRI
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Metadata
- Authors
- Menon, R. S., Ogawa, S., Tank, D. W., & Uǧurbil, K.
- Venue
- Magnetic Resonance in Medicine
- Publisher
- Wiley
- Published
- 1993-09
- Volume
- 30
- Issue
- 3
- Pages
- 380-386
- ISSN
- 0740-3194 (ISSN-L)
- 1522-2594
- OpenAlex
- W2014875176
- Cited by
- 413
- References
- 3
- FWCI
- 20.05
- Type
- journal article
- Language
- en
- Open access
- closed
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