Fast temporal adaptation of on-off units in the first optic chiasm of the blowfly
- 1 June 1991
- journal article
- research article
- Published by Springer Nature in Journal of Comparative Physiology A
- Vol. 168 (6), 631-637
- https://doi.org/10.1007/bf00224353
Abstract
We recorded from spiking units in the first optic chiasm between lamina and medulla in the brain of the blowfly (Calliphora vicina). Both previously characterized neuron types, on-off units and sustaining units, were encountered. On-off units had a temporal frequency response with a lower cut-off frequency than blowfly photoreceptors. This low cut-off frequency is related to a fast temporal adaptation of the on-off units to trains of short light pulses. Temporal adaptation occurred independently for short on- and off-pulses. On-off units only responded to stimuli of relatively large contrast. Contrasts of less than 10% gave little or no response.Keywords
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