Neuronal Sensitivity to Microsecond Time Disparities in the Electrosensory System of<i>Gymnarchus niloticus</i>

Matsushita, Atsuko; Kawasaki, Masashi

doi:10.1523/jneurosci.3670-05.2005

Cited by 15 publications

(8 citation statements)

References 44 publications

(68 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A similar mechanism has been proposed to occur in Type I hair cells (Goldberg, 1996) and in synapses in the electrosensory system of Gymnarchus (Carr, 2004; Matsushita and Kawasaki, 2005). …”

Section: Electrical Interactions At Chemical Synapses: Variations On mentioning

confidence: 55%

Field effects in the CNS play functional roles

Weiss

Faber

2010

Front. Neural Circuits

View full text Add to dashboard Cite

An endogenous electrical field effect, i.e., ephaptic transmission, occurs when an electric field associated with activity occurring in one neuron polarizes the membrane of another neuron. It is well established that field effects occur during pathological conditions, such as epilepsy, but less clear if they play a functional role in the healthy brain. Here, we describe the principles of field effect interactions, discuss identified field effects in diverse brain structures from the teleost Mauthner cell to the mammalian cortex, and speculate on the function of these interactions. Recent evidence supports that relatively weak endogenous and exogenous field effects in laminar structures reach significance because they are amplified by network interactions. Such interactions may be important in rhythmogenesis for the cortical slow wave and hippocampal sharp wave–ripple, and also during transcranial stimulation.

show abstract

Section: Electrical Interactions At Chemical Synapses: Variations On mentioning

confidence: 55%

Field effects in the CNS play functional roles

Weiss

Faber

2010

Front. Neural Circuits

View full text Add to dashboard Cite

show abstract

“…As mentioned earlier, both Eigenmannia and Gymnarchus can determine the sense of rotation of Lissajous graphs in Fig. 4 by performing correct JARs (frequency shifts in the correct directions) even when the magnitude of amplitude and time modulation are ~0.02% and 100 to 300 nsec, respectively (Guo and Kawasaki, 1997;Kawasaki et al, 1988;Matsushita and Kawasaki, 2005;Rose and Heiligenberg, 1985a). The acuity exhibited by the JAR is better than that seen at the level of individual sensory receptors or afferent nerve fibers.…”

Section: Sensory Hyperacuity and Preadaptation To Electrolocationmentioning

confidence: 72%

“…Here, the neural code for phase differences transforms from a time code to a rate code: while phase information is expressed as the timing of action potentials in the time-lock input neurons, the output pyramidal cells express phase-difference information by means of firing rate. The pyramidal cells are highly sensitive to small time differences: they respond to time differences on the order of a few microseconds or phase differences of ~0.2° (Matsushita and Kawasaki, 2005). The entire time-comparison mechanism is confined to the hindbrain in Gymnarchus.…”

Section: Neural Mechanisms For the Detection Of Time Differences In Wmentioning

confidence: 99%

Multiple Cases of Striking Genetic Similarity Between Alternate Electric Fish Signal Morphs in Sympatry

Arnegard

Bogdanowicz

Hopkins

2005

Evol

View full text Add to dashboard Cite

“…The giant cells, like the S-afferents, terminate on the dendrites of ovoidal cells and pyramidal cells (Kawasaki and Guo 1996;Matsushita and Kawasaki 2004). As one would predict from the anatomical convergence of precise timing information from two different sources, the pyramidal cells within the inner cell layer are highly sensitive to differential phase modulation (Kawasaki andGuo 1996Kawasaki andGuo 1998;Matsushita and Kawasaki 2005). Although the O-afferent pathway has not been as well studied, the O-afferents do not appear to project to the inner cell layer of the ELL, but instead to other regions of the ELL (Kawasaki and Guo 1996), where pyramidal neurons that are more sensitive to AM than PM are found (Kawasaki and Guo 1998).…”

Section: Separate Pathways For Amplitude-coding and Time-codingmentioning

confidence: 99%

From stimulus estimation to combination sensitivity: encoding and processing of amplitude and timing information in parallel, convergent sensory pathways

Carlson

Kawasaki

2008

J Comput Neurosci

View full text Add to dashboard Cite

Information theoretical approaches to sensory processing in electric fish have focused on the encoding of amplitude modulations in a single sensory pathway in the South American gymnotiforms. To assess the generality of these studies, we investigated the encoding of amplitude and phase modulations in the distantly related African fish Gymnarchus. In both the amplitude-and time-coding pathways, primary afferents accurately estimated the time course of random modulations whereas hindbrain neurons extracted information about specific stimulus features. Despite exhibiting a clear preference for encoding amplitude or phase, afferents and hindbrain neurons could encode significant amounts of modulation of their nonpreferred attribute. Although no increase in feature extraction performance occurred where the two pathways converge in the midbrain, neurons there were increasingly sensitive to simultaneous modulation of both attributes. A shift from accurate stimulus estimation in the periphery to increasingly sparse representations of specific features appears to be a general strategy in electrosensory processing.

show abstract

Neuronal Sensitivity to Microsecond Time Disparities in the Electrosensory System ofGymnarchus niloticus

Cited by 15 publications

References 44 publications

Field effects in the CNS play functional roles

Field effects in the CNS play functional roles

Multiple Cases of Striking Genetic Similarity Between Alternate Electric Fish Signal Morphs in Sympatry

From stimulus estimation to combination sensitivity: encoding and processing of amplitude and timing information in parallel, convergent sensory pathways

Contact Info

Product

Resources

About