High speed coding for velocity by archerfish retinal ganglion cells.
BACKGROUND
Archerfish show very short behavioural latencies in response to falling prey. This raises the question, which response parameters of retinal ganglion cells to moving stimuli are best suited for fast coding of stimulus speed and direction.


RESULTS
We compared stimulus reconstruction quality based on the ganglion cell response parameters latency, first interspike interval, and rate. For stimulus reconstruction of moving stimuli using latency was superior to using the other stimulus parameters. This was true for absolute latency, with respect to stimulus onset, as well as for relative latency, with respect to population response onset. Iteratively increasing the number of cells used for reconstruction decreased the calculated error close to zero.


CONCLUSIONS
Latency is the fastest response parameter available to the brain. Therefore, latency coding is best suited for high speed coding of moving objects. The quantitative data of this study are in good accordance with previously published behavioural response latencies.
Department of Biology and Environmental Sciences, Neurobiology, University of Oldenburg, Oldenburg, Germany.
Viola
V
Kretschmer
Friedrich
F
Kretschmer
Malte T
MT
Ahlers
Josef
J
Ammermüller
D000200:Action Potentials / Q000502:physiology*; D000818:Animals; D001703:Biophysics; D016000:Cluster Analysis; D005399:Fishes; D008027:Light; D016013:Likelihood Functions; D008959:Models, Neurological; D010775:Photic Stimulation; D011930:Reaction Time / Q000502:physiology*; D012160:Retina / Q000166:cytology; D012165:Retinal Ganglion Cells / Q000502:physiology*; D013997:Time Factors; D014795:Visual Pathways / Q000502:physiology