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investigation that the surface areas of V1 and V2, V2 and V3 have a relatively high
correlation, between V1 and V3 was not. In our results, the correlation in size be-
tween V2 and V3 is significant, but between V1 and V2, V1 and V3were not. The V2
surface area in the wide-filed 60 deg representation is roughly 82% that of V1, and
this size difference is statistically significant. The surface area of V3 is averaged 1556
mm^2. V3 is on average 71% the size of V1, and this size difference is statistically
significant. There is a difference from previous research in central vision [17]. In
Dougherty's data, the surface area of V2 was about 75% and V3 was about 55% the
size of V1. The area of V2 and V3 in our results were significatively larger than that
in 0~12deg. In our results, the correlation in size between V2 and V3 is significant,
but between V1 and V2, V1 and V3 were not. The previous DTI research [18] found
the pattern of connections between V1/V2 ↔ PPA and V3 ↔ FFA, respectively. So
among V1, V2 and V3 may be complex correlation because of the influence of addi-
tional factors, such as the insertion of a significant pulvinar input at the level of V2,
V3 and increasing significance of feedback and other projections.
5 Conclusion
In this study, we quantitatively investigated the functional characteristics of human
peripheral visual fields. We used fMRI to identify the areal magnification factor and
surface area size of the V1, V2, V3 for a wide visual field of eccentricity up to 60°
which is lager than that in previous studies. We also estimated the average V1, V2,
V3 surface area. This study demonstrated that among V1, V2 and V3 may be complex
correlation because of the influence of additional factors, such as the insertion of a
significant pulvinar input at the level of V2, V3 and increasing significance of feed-
back and other projections.
Acknowledgment
A part of this study was financially supported by JSPS AA Science Platform Program
and Grant-in-Aid for Scientific Research (B) (21404002). We thank the subjects who
participated in this study and the staff of the Osaka Neurosurgery Hospital for their
assistance with data collection.
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