Cross-correlation analysis reveals circuits and mechanisms underlying direction selectivity.
نویسندگان
چکیده
منابع مشابه
Mechanisms of Direction Selectivity in Macaque
Shapley et al., 1991; DeAngelis et al., 1993; Jagadeesh Mechanisms underlying direction selectivity were et al., 1993, 1997; McLean et al., 1994). These studies studied in V1 of alert fixating macaque monkeys. Some show that in direction-selective simple cells, the time direction-selective cells showed delayed asymmetric course of the response to a flashed bar or to a stationary inhibition, som...
متن کاملMechanisms of Direction Selectivity in Macaque V1
Mechanisms underlying direction selectivity were studied in V1 of alert fixating macaque monkeys. Some direction-selective cells showed delayed asymmetric inhibition, some showed a shifting excitatory time course across the receptive field, and some showed both. Both the direction of the spatial offset of the inhibition and the direction of the shift in excitatory response time course correlate...
متن کاملNeural circuits for direction selectivity in visual cortex
Variance adaptation processes have recently been examined in cells of the !y visual system and various vertebrate preparations. To better understand the contributions of somatic mechanisms to this kind of adaptation, we recorded intracellularly in vitro from neurons of rat sensorimotor cortex. The cells were stimulated with a noise current whose standard deviation was varied parametrically. We ...
متن کاملInter-neuronal correlation distinguishes mechanisms of direction selectivity in cortical circuit models.
Direction selectivity is a fundamental physiological property that arises from primary visual cortex (V1) circuitry, yet basic questions of how direction-selective (DS) receptive fields are constructed remain unanswered. We built a set of simple, plausible neuronal circuits that produce DS cells via different mechanisms and tested these circuits to determine how they can be distinguished experi...
متن کاملMicroseism source direction from noise cross-correlation
S U M M A R Y Inhomogeneous noise sources surrounding stations produce asymmetric amplitudes in crosscorrelation functions that yield preferential source directions. Here we show that preprocessing biases the dominant source direction estimate towards the source producing long-duration signals by down-weighting high-amplitude signals. Tests with both synthetic data and observations show that co...
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ژورنال
عنوان ژورنال: Frontiers in Neuroscience
سال: 2010
ISSN: 1662-453X
DOI: 10.3389/conf.fnins.2010.03.00332