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Figure 2


Fig. 2. Responses of LoTu1 to dorsally presented polarized light (Dors pol-light). (A) Intracellular recording traces during stimulation with three polarized monochromatic light stimuli at 9.0x109 photons cm–2 s–1. Bars below the recording traces indicate the duration of the stimuli and the direction of rotation. (B) Relative spiking activities at {Phi}max (open bars) and response strength R (solid black bars; for definition, see Materials and methods) in response to three polarized monochromatic lights (means ± s.e.m.). Relative spiking activity at {Phi}max and R are significantly larger in response to polarized blue light than to UV and green light, *P<0.05; **P<0.01 (t-test). (C,D) Intensity/response curves of neural activity at {Phi}max (C) and R (D) in response to polarized blue (450 nm) light (means ± s.e.m.). Maximum light intensity (logI=0) is 10.6x1012 photons cm–2 s–1. Solid lines show fits of Naka–Rushton functions with the fitting parameters rAmax=0.98, K=–3.33 log units, n=0.83 (C) and rRmax=0.99, K=–3.28 log units, n=0.4 (D). Broken lines indicate background activity (C) and no-stimulus R value (D).





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