SFN2010 Note #3

Just as I thought yesterday that it is possible to use pRF for long-range interaction, Doumolin (531.9) gave a talk this morning doing exactly that. They did put much promoting this technique.

However, I think Brewer did a better job (580.7-580.8). Her group associate pRF and retinotopic mapping and showed the pinwheel structure all the way down to TO.

Zotto et al. (581.22) showed that N190 is sensitive to the attractiveness of female body. I would say the difference is between naked and dressed body, not attractiveness.

Oh! And monkey has inversion effect for faces as well (581.23). And there is a study on the other-species, not other-race effect in face recognition. Fun!

Color vision symposium
620.4 Single opponent cells in V1 are not orientation tuned, but double opponent cells are. So, the excitatory and inhibitory regions of double opponent cells are not concentric but elongated and situated side by side.

620.5 Horwitz use staircase procedure to find the isoresponse contour of a neuron in a color space. Start with a low contrast, increase it until the response of the neuron hits a criteria, then, decrease the contrast. This procedure go back and forth for several reversals. Then, it is the isoresponse for that color direction. The data is then fit with qudratic planes.
The shape of the quadratic plane can be explained by a hierarchical model of neurons. The second order neuron responds only if two orthogonal (in terms of sensitivity plane) first order neurons fires.