Cited by 657Visual perception and processing mechanismsMultisensory perception and integrationMotor Control and Adaptation

Microstimulation in visual area MT: effects on direction discrimination performance

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Salzman, CD, Murasugi, CM, Britten, KH, Newsome, WT·1992·The Journal of Neuroscience

Abstract

Physiological and behavioral evidence suggests that the activity of direction selective neurons in visual cortex underlies the perception of moving visual stimuli. We tested this hypothesis by measuring the effects of cortical microstimulation on perceptual judgements of motion direction. To accomplish this, rhesus monkeys were trained to discriminate the direction of motion in a near-threshold, stochastic motion display. For each experiment, we positioned a microelectrode in the middle of a cluster of neurons that shared a common preferred direction of motion. The psychophysical task was then adjusted so that the visual display was presented directly over the neurons' receptive field. The monkeys were required to discriminate between motion shown either in the direction preferred by the neurons or in the opposite direction. On half the trials of an experiment, we applied electrical microstimulation while monkeys viewed the motion display. We hypothesized that enhancing the neurons' discharge rate would introduce a directionally specific signal into the cortex and thereby influence the monkeys' choices on the discrimination task. We compared the monkeys' performance on “stimulated” and “nonstimulated” trials in 139 experiments; all trials within an experiment were presented in random order. Statistically significant effects of microstimulation were obtained in 89 experiments. In 86 of the 89 experiments with significant effects (97%), the monkeys indicated that motion was in the neurons' preferred direction more frequently on stimulated trials than on nonstimulated trials. The data demonstrate a functional link between the activity of direction selective neurons and perceptual judgements of motion direction.

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Crossref · 10.1523/jneurosci.12-06-02331.1992

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  1. Deyoe EA (1983) An investigation in the awake macaque ofthe thresh- old for detection of electrical currents applied to striate cortex: psy- chophysical properties and laminar differences. PhD thesis, Univer- sity of Rochester.
  2. Orbach HS, Felleman DJ, Ribak EN, Van Essen DC (1991) Visual- ization ofcortical connections with voltage sensitive dyes. In: Analysis and modeling of neural systems (Eeckman F, ed), in press. Norwell, 31-47. MA: Kluwer.
  3. Vandenbussche E, Saunders RC, Orban GA (199 1) MT lesions impair monkey speed discrimination. Assoc Res Vis Ophthalmol Abstr 32: 823.

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Authors
Salzman, C., Murasugi, C., Britten, K., & Newsome, W.
Affiliations
Stanford Medicine (US)
Venue
The Journal of Neuroscience
Published
1992-06-01
Volume
12
Issue
6
Pages
2331-2355
ISSN
  • 0270-6474 (ISSN-L)
  • 1529-2401
OpenAlex
W2133035722
Cited by
657
References
89
Citations by year
2026: 14 · 2025: 16 · 2024: 21 · 2023: 45 · 2022: 19 · 2021: 19 · 2020: 34 · 2019: 16 · 2018: 16 · 2017: 17 · 2016: 17 · 2015: 22 · 2014: 26 · 2013: 16 · 2012: 28
FWCI
4.88
Type
journal article
Language
en
Open access
Locations
  • Journal of Neuroscience (publishedVersion, cc-by-nc-sa)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Howard Hughes Medical Institute
  • National Institutes of Health
  • Natural Sciences and Engineering Research Council of Canada
  • Office of Naval Research
  • National Eye Institute (EY 5603)
  • National Institute of Neurological Disorders and Stroke (NS 07158-11, T32NS007158)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Visual perception and processing mechanisms
  • Social Sciences › Psychology › Experimental and Cognitive Psychology › Multisensory perception and integration
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Motor Control and Adaptation
Keywords
direction-selective neurons, motion direction discrimination, direction selectivity, rhesus monkeys, receptive fields, visual cortex
MeSH terms
Animals, Behavior, Animal, Discrimination, Psychological, Electric Stimulation, Eye Movements, Macaca mulatta, Motion Perception, Probability, Psychophysics, Time Factors, Visual Cortex

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