TY - JOUR
T1 - Identification of the ventral occipital visual field maps in the human brain
AU - Winawer, Jonathan
AU - Witthoft, Nathan
N1 - Funding Information:
Grant information: The authors acknowledge two funding sources, National Institutes of Health (grant R00-EY022116 to JW) and (grant R01-EY023915 to Kalanit Grill Spector (supporting NW)).
Publisher Copyright:
© 2017 Winawer J and Witthoft N.
PY - 2017
Y1 - 2017
N2 - The location and topography of the first three visual field maps in the human brain, V1-V3, are well agreed upon and routinely measured across most laboratories. The position of 4 th visual field map, 'hV4', is identified with less consistency in the neuroimaging literature. Using magnetic resonance imaging data, we describe landmarks to help identify the position and borders of 'hV4'. The data consist of anatomical images, visualized as cortical meshes to highlight the sulcal and gyral patterns, and functional data obtained from retinotopic mapping experiments, visualized as eccentricity and angle maps on the cortical surface. Several features of the functional and anatomical data can be found across nearly all subjects and are helpful for identifying the location and extent of the hV4 map. The medial border of hV4 is shared with the posterior, ventral portion of V3, and is marked by a retinotopic representation of the upper vertical meridian. The anterior border of hV4 is shared with the VO-1 map, and falls on a retinotopic representation of the peripheral visual field, usually coincident with the posterior transverse collateral sulcus. The ventro-lateral edge of the map typically falls on the inferior occipital gyrus, where functional MRI artifacts often obscure the retinotopic data. Finally, we demonstrate the continuity of retinotopic parameters between hV4 and its neighbors; hV4 and V3v contain iso-eccentricity lines in register, whereas hV4 and VO-1 contain iso-polar angle lines in register. Together, the multiple constraints allow for a consistent identification of the hV4 map across most human subjects.
AB - The location and topography of the first three visual field maps in the human brain, V1-V3, are well agreed upon and routinely measured across most laboratories. The position of 4 th visual field map, 'hV4', is identified with less consistency in the neuroimaging literature. Using magnetic resonance imaging data, we describe landmarks to help identify the position and borders of 'hV4'. The data consist of anatomical images, visualized as cortical meshes to highlight the sulcal and gyral patterns, and functional data obtained from retinotopic mapping experiments, visualized as eccentricity and angle maps on the cortical surface. Several features of the functional and anatomical data can be found across nearly all subjects and are helpful for identifying the location and extent of the hV4 map. The medial border of hV4 is shared with the posterior, ventral portion of V3, and is marked by a retinotopic representation of the upper vertical meridian. The anterior border of hV4 is shared with the VO-1 map, and falls on a retinotopic representation of the peripheral visual field, usually coincident with the posterior transverse collateral sulcus. The ventro-lateral edge of the map typically falls on the inferior occipital gyrus, where functional MRI artifacts often obscure the retinotopic data. Finally, we demonstrate the continuity of retinotopic parameters between hV4 and its neighbors; hV4 and V3v contain iso-eccentricity lines in register, whereas hV4 and VO-1 contain iso-polar angle lines in register. Together, the multiple constraints allow for a consistent identification of the hV4 map across most human subjects.
KW - Collateral sulcus
KW - Functional magnetic resonance imaging
KW - Fusiform gyrus
KW - HV4
KW - Population receptive field
KW - Retinotopic map
KW - Visual cortex
KW - Visual field map
UR - http://www.scopus.com/inward/record.url?scp=85060131775&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85060131775&partnerID=8YFLogxK
U2 - 10.12688/f1000research.12364.1
DO - 10.12688/f1000research.12364.1
M3 - Article
C2 - 29188017
AN - SCOPUS:85060131775
SN - 2046-1402
VL - 6
JO - F1000Research
JF - F1000Research
M1 - 1526
ER -