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. Author manuscript; available in PMC: 2008 Sep 27.
Published in final edited form as: Neuron. 2008 Mar 27;57(6):894–904. doi: 10.1016/j.neuron.2008.01.031

Figure 8. Light responses of AII amacrine cells are more amplified than those of rod bipolar cells.

Figure 8

Light responses in the AII amacrine cell more amplified than in the rod bipolar cell. (A) Current responses of a rod bipolar cell to a 10 ms dim flash (gray; 0.06 Rh*/rod) and saturating flash (black; 37.8 Rh*/rod). (B) Current responses of an AII amacrine cell to a 10 msec dim flash (gray; 0.07 Rh*/rod) and saturating flash (black; 4 Rh*/rod). Signals are amplified in the AII amacrine cell. (C) Intensity-response relations for rod bipolars and AII amacrine cells taken from (Dunn et al., 2006) and shown on a scale for photon absorptions per rod bipolar. Flash strength does not account for the nonlinearity at the rod-to-rod bipolar synapse to show effective photon absorptions; this would shift the data points leftward by a factor of 0.3–0.5. AII amacrines cell responses reach saturation at light levels 100 times less than responses of rod bipolar cells.

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