Stimulus-induced up states in the dorsal pallium of a weakly electric fish

Stimulus-induced up states in the dorsal pallium of a weakly electric fish.

We investigated the response of putative novelty-detecting neurons in the pallium of an electric fish to electrosensory and acoustic stimuli. Extracellular and whole cell patch recordings were made from neurons in the dorsal pallial nucleus (DD) of Apteronotus leptorhynchus. DD neurons were typically quiescent and exhibited hyperpolarized resting membrane potentials. Stimulation induced, with a...

Stimulus induced Up states in the dorsal pallium of a weakly electric fish RUNNING HEAD Stimulus induced Up states in the dorsal pallium AUTHORS

1 We investigated the response of putative novelty-detecting neurons in the pallium of an 2 electric fish to electrosensory and acoustic stimuli. Extracellular and whole-cell patch 3 recordings were made from neurons in the dorsal pallial nucleus (DD) of Apteronotus 4 leptorhynchus. DD neurons were typically quiescent and exhibited hyperpolarized resting 5 membrane potentials. Stimulation induc...

Phantoms in the brain: ambiguous representations of stimulus amplitude and timing in weakly electric fish.

In wave-type weakly electric fish, two distinct types of primary afferent fibers are specialized for separately encoding modulations in the amplitude and phase (timing) of electrosensory stimuli. Time-coding afferents phase lock to periodic stimuli and respond to changes in stimulus phase with shifts in spike timing. Amplitude-coding afferents fire sporadically to periodic stimuli. Their probab...

Stimulus encoding and feature extraction by multiple pyramidal cells in the hindbrain of weakly electric fish

Modeling the electric field of weakly electric fish.

Weakly electric fish characterize the environment in which they live by sensing distortions in their self-generated electric field. These distortions result in electric images forming across their skin. In order to better understand electric field generation and image formation in one particular species of electric fish, Apteronotus leptorhynchus, we have developed three different numerical mod...