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Psychology Colloquium with Noah Benson, PhD
WhenWednesday, Jul 31, 2019, 3 – 4 p.m.
Campus locationGuthrie Hall (GTH)
Campus room57
Event typesLectures/Seminars
Event sponsorsDepartment of Psychology
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Description

Noah Benson, PhD
Research Scientist, Department of Psychology, NYU

The Organization of V1-V3 and its Heritability in 181 Subjects from the Human Connectome Project
The retinotopic organization of V1, V2, and V3 has been studied extensively in humans using fMRI. Such studies have frequently reported large variation in the size of striate cortex across subjects. However, most such studies have included a fairly modest number of subjects (typically n < 20), and the origin of this variance remains unknown. Here, we characterize the distribution of retinotopic organization of V1-V3 at a previously infeasible precision using the Human Connectome Project 7T Retinotopy Dataset (Benson et al., 2018, DOI:10.1167/18.13.23). We ask to what extent heritability plays a role in determining the size of these early visual areas. The HCP 7T retinotopy dataset is the world's largest collection of high resolution retinotopic measurements, containing 181 subjects, 86 of whom are monozygotic twins and 58 of whom are dizygotic twins. We find that the variation in the sizes of V1-V3 across the subjects in this dataset is much higher than previously reported and that the ability of genetics to predict early visual area sizes is substantially lower than its ability to predict overall hemisphere size. These results provide a population benchmark against which subjects and patients can be compared and suggest that experience may play a large role in determining some features of the organization of early visual cortex.

This free lecture is made possible in part by a generous endowment from Professor Roger B. Loucks.

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