Abstract
Summary Sleep-like states occur in the life of all animals carefully studied and are characterized by reduced behavioral and neural activity as well as reduced responsiveness to stimulation [1]. How is reduced responsiveness to stimulation generated? We used calcium imaging to investigate a sleep-like state in larvae of the nematode Caenorhabditis elegans . We found that overall spontaneous neural activity was reduced during the sleep-like state in many neurons, including the mechanosensory neuron ALM. Stimulus-evoked calcium transients and behavior were reduced in ALM during the sleep-like state. Thus, reduced activity of ALM may contribute to reduce responsiveness during a sleep-like state.
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