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Can I read A Subcortical Pathway to the Right Amygdala Mediating “Unseen” Fear on EtoBox?
A Subcortical Pathway to the Right Amygdala Mediating “Unseen” Fear by J. S. Morris; A. Öhman; R. J. Dolan is a Biochemistry, Genetics and Molecular Biology article available to read on EtoBox.
What is A Subcortical Pathway to the Right Amygdala Mediating “Unseen” Fear about?
Neuroimaging studies have shown differential amygdala responses to masked (“unseen”) emotional stimuli. How visual signals related to such unseen stimuli access the amygdala is unknown. A possible pathway, involving the superior colliculus and pulvinar, is suggested by observations of patients with striate cortex lesions who show preserved abilities to localize and discriminate visual stimuli that are not consciously perceived (“blindsight”). We used measures of right amygdala neural activity acquired from volunteer subjects viewing masked fear-conditioned faces to determine whether a colliculo-pulvinar pathway was engaged during processing of these unseen target stimuli. Increased connectivity between right amygdala, pulvinar, and superior colliculus was evident when fear-conditioned faces were unseen rather than seen. Right amygdala connectivity with fusiform and orbitofrontal cortices decreased in the same condition. By contrast, the left amygdala, whose activity did not discriminate seen and unseen fear-conditioned targets, showed no masking-dependent changes in connectivity with superior colliculus or pulvinar. These results suggest that a subcortical pathway to the right amyg
Who reads A Subcortical Pathway to the Right Amygdala Mediating “Unseen” Fear?
It is typically read by researchers, students, and practitioners in Biochemistry, Genetics and Molecular Biology.
- Author
- J. S. Morris; A. Öhman; R. J. Dolan
- Publisher
- Proceedings of the National Academy of Sciences
- Published
- 1999
- Language
- EN
- Field
- Biochemistry, Genetics and Molecular Biology (Life Sciences)