Triple visual hemifield maps in a case of optic chiasm hypoplasia

Research output: Contribution to journalArticle

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Triple visual hemifield maps in a case of optic chiasm hypoplasia. / Ahmadi, Khazar; Fracasso, Alessio; Puzniak, Robert J.; Gouws, Andre D.; Yakupov, Renat; Speck, Oliver; Kaufmann, Joern; Pestilli, Franco; Dumoulin, Serge O.; Morland, Antony B.; Hoffmann, Michael B.

In: NeuroImage, Vol. 215, 116822, 15.07.2020.

Research output: Contribution to journalArticle

Harvard

Ahmadi, K, Fracasso, A, Puzniak, RJ, Gouws, AD, Yakupov, R, Speck, O, Kaufmann, J, Pestilli, F, Dumoulin, SO, Morland, AB & Hoffmann, MB 2020, 'Triple visual hemifield maps in a case of optic chiasm hypoplasia', NeuroImage, vol. 215, 116822. https://doi.org/10.1016/j.neuroimage.2020.116822

APA

Ahmadi, K., Fracasso, A., Puzniak, R. J., Gouws, A. D., Yakupov, R., Speck, O., ... Hoffmann, M. B. (2020). Triple visual hemifield maps in a case of optic chiasm hypoplasia. NeuroImage, 215, [116822]. https://doi.org/10.1016/j.neuroimage.2020.116822

CBE

Ahmadi K, Fracasso A, Puzniak RJ, Gouws AD, Yakupov R, Speck O, Kaufmann J, Pestilli F, Dumoulin SO, Morland AB, Hoffmann MB. 2020. Triple visual hemifield maps in a case of optic chiasm hypoplasia. NeuroImage. 215. https://doi.org/10.1016/j.neuroimage.2020.116822

MLA

Vancouver

Ahmadi K, Fracasso A, Puzniak RJ, Gouws AD, Yakupov R, Speck O et al. Triple visual hemifield maps in a case of optic chiasm hypoplasia. NeuroImage. 2020 Jul 15;215. 116822. https://doi.org/10.1016/j.neuroimage.2020.116822

Author

Ahmadi, Khazar ; Fracasso, Alessio ; Puzniak, Robert J. ; Gouws, Andre D. ; Yakupov, Renat ; Speck, Oliver ; Kaufmann, Joern ; Pestilli, Franco ; Dumoulin, Serge O. ; Morland, Antony B. ; Hoffmann, Michael B. / Triple visual hemifield maps in a case of optic chiasm hypoplasia. In: NeuroImage. 2020 ; Vol. 215.

RIS

TY - JOUR

T1 - Triple visual hemifield maps in a case of optic chiasm hypoplasia

AU - Ahmadi, Khazar

AU - Fracasso, Alessio

AU - Puzniak, Robert J.

AU - Gouws, Andre D.

AU - Yakupov, Renat

AU - Speck, Oliver

AU - Kaufmann, Joern

AU - Pestilli, Franco

AU - Dumoulin, Serge O.

AU - Morland, Antony B.

AU - Hoffmann, Michael B.

PY - 2020/7/15

Y1 - 2020/7/15

N2 - In humans, each hemisphere comprises an overlay of two visuotopic maps of the contralateral visual field, one from each eye. Is the capacity of the visual cortex limited to these two maps or are plastic mechanisms available to host more maps? We determined the cortical organization of the visual field maps in a rare individual with chiasma hypoplasia, where visual cortex plasticity is challenged to accommodate three hemifield maps. Using high-resolution fMRI at 7T and diffusion-weighted MRI at 3T, we found three hemiretinal inputs, instead of the normal two, to converge onto the left hemisphere. fMRI-based population receptive field mapping of the left V1–V3 at 3T revealed three superimposed hemifield representations in the left visual cortex, i.e. two representations of opposing visual hemifields from the left eye and one right hemifield representation from the right eye. We conclude that developmental plasticity including the re-wiring of local intra- and cortico-cortical connections is pivotal to support the coexistence and functioning of three hemifield maps within one hemisphere.

AB - In humans, each hemisphere comprises an overlay of two visuotopic maps of the contralateral visual field, one from each eye. Is the capacity of the visual cortex limited to these two maps or are plastic mechanisms available to host more maps? We determined the cortical organization of the visual field maps in a rare individual with chiasma hypoplasia, where visual cortex plasticity is challenged to accommodate three hemifield maps. Using high-resolution fMRI at 7T and diffusion-weighted MRI at 3T, we found three hemiretinal inputs, instead of the normal two, to converge onto the left hemisphere. fMRI-based population receptive field mapping of the left V1–V3 at 3T revealed three superimposed hemifield representations in the left visual cortex, i.e. two representations of opposing visual hemifields from the left eye and one right hemifield representation from the right eye. We conclude that developmental plasticity including the re-wiring of local intra- and cortico-cortical connections is pivotal to support the coexistence and functioning of three hemifield maps within one hemisphere.

KW - DWI

KW - fMRI

KW - Optic chiasm

KW - Plasticity

KW - Retinotopy

KW - Visual cortex

U2 - 10.1016/j.neuroimage.2020.116822

DO - 10.1016/j.neuroimage.2020.116822

M3 - Article

VL - 215

JO - NeuroImage

JF - NeuroImage

SN - 1095-9572

M1 - 116822

ER -