. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 170 R. B. BARLOW ET AL. Figure 1. A horseshoe crab. Limuliis polyphemus, mounted with a video camera. "; for recording underwater movies and a microsuction electrode for recording responses from a single optic nerve fiber. A white Teflon cap ( cm diameter) seals the recording chamber, which is attached to the carapace anterior to the right lateral eye. The barrel of the microsuction electrode protrudes from the recording chamber to the right. Tethers lead the video and optic nerve signals to recording el
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 170 R. B. BARLOW ET AL. Figure 1. A horseshoe crab. Limuliis polyphemus, mounted with a video camera. "; for recording underwater movies and a microsuction electrode for recording responses from a single optic nerve fiber. A white Teflon cap ( cm diameter) seals the recording chamber, which is attached to the carapace anterior to the right lateral eye. The barrel of the microsuction electrode protrudes from the recording chamber to the right. Tethers lead the video and optic nerve signals to recording electronics located on shore or in an overhead skiff as the animal moves about underwater at depths of to 1 m. Experiments were carried out in an estuary near the Marine Biological Laboratory, Woods Hole. Massachusetts. We have constructed a computational model of the lateral eye that predicts optic nerve responses with good accuracy (Passaglia et al., 1998). In brief, the model treats the retina as an array of neurons that samples visual space as the compound eye does, incorporates the known excitatory and inhibitory integrative mechanisms of the retina, and adapts to changes in ambient illumination. Our strategy for examining the retinal code underlying be- havior is to first videotape the lateral eye's view of its under- water world with an animal-mounted camera ("CrabCam") while simultaneously recording from a single optic nerve fiber of an ommatidium viewing the central region of the videotaped scene (Passaglia et al., 1997a). Figure 1 shows the CrabCam and the watertight recording chamber mounted on an animal before it enters the water and passes near submerged mate-like objects near the water's edge in Woods Hole, Massachusetts. Back in the laboratory we digitize the CrabCam recordings and feed them to the cell-based model, which then computes the arrays of optic nerve activities in response to the underwater scenes. The computed arrays of activities are conv
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
