Sensory hyperacuity in the jamming avoidance response of weakly electric fish.
نویسنده
چکیده
Sensory systems often show remarkable sensitivities to small stimulus parameters. Weakly electric fish are able to resolve intensity differences of the order of 0.1% and timing differences of the order of nanoseconds during an electrical behavior, the jamming avoidance response. The neuronal origin of this extraordinary sensitivity is being studied within the exceptionally well understood central mechanisms of this behavior.
منابع مشابه
Beyond the Jamming Avoidance Response: weakly electric fish respond to the envelope of social electrosensory signals.
Recent studies have shown that central nervous system neurons in weakly electric fish respond to artificially constructed electrosensory envelopes, but the behavioral relevance of such stimuli is unclear. Here we investigate the possibility that social context creates envelopes that drive behavior. When Eigenmannia virescens are in groups of three or more, the interactions between their pseudo-...
متن کاملSpecies differences in group size and electrosensory interference in weakly electric fishes: implications for electrosensory processing.
In animals with active sensory systems, group size can have dramatic effects on the sensory information available to individuals. In "wave-type" weakly electric fishes there is a categorical difference in sensory processing between solitary fish and fish in groups: when conspecifics are within about 1m of each other, the electric fields mix and produce interference patterns that are detected by...
متن کاملWaveform discrimination, phase sensitivity and jamming avoidance in a wave-type electric fish
The electric organ discharge (EOD) of most species of the freshwater knifefishes (Gymnotiformes) of South America is of the wave, not the pulse, type. Wave EODs are usually of constant frequency and amplitude, and show a bewildering multitude of species-characteristic waveforms. The EOD of Eigenmannia is sexually dimorphic in waveform and in the intensity of its higher harmonics. In a go/no go ...
متن کاملClosed - loop stabilization of the Jamming Avoidance Response 1 reveals its locally unstable and globally nonlinear dynamics
The Jamming Avoidance Response, or JAR, in the weakly electric fish has been analyzed at all levels of organization, from 9 whole-organism behavior down to specific ion channels. Nevertheless, a parsimonious description of the JAR behavior in terms of 10 a dynamical system model has not been achieved at least in part due to the fact that “avoidance” behaviors are both intrinsically 11 unstable ...
متن کاملClosed-loop stabilization of the Jamming Avoidance Response reveals its locally unstable and globally nonlinear dynamics.
The Jamming Avoidance Response, or JAR, in the weakly electric fish has been analyzed at all levels of organization, from whole-organism behavior down to specific ion channels. Nevertheless, a parsimonious description of the JAR behavior in terms of a dynamical system model has not been achieved at least in part due to the fact that 'avoidance' behaviors are both intrinsically unstable and nonl...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Current opinion in neurobiology
دوره 7 4 شماره
صفحات -
تاریخ انتشار 1997