A selective impairment of motion perception following lesions of the middle temporal visual area (MT)
Open accessAbstract
Physiological experiments indicate that the middle temporal visual area (MT) of primates plays a prominent role in the cortical analysis of visual motion. We investigated the role of MT in visual perception by examining the effect of chemical lesions of MT on psychophysical thresholds. We trained rhesus monkeys on psychophysical tasks that enabled us to assess their sensitivity to motion and to contrast. For motion psychophysics, we employed a dynamic random dot display that permitted us to vary the intensity of a motion signal in the midst of masking motion noise. We measured the threshold intensity for which the monkey could successfully complete a direction discrimination. In the contrast task, we measured the threshold contrast for which the monkeys could successfully discriminate the orientation of stationary gratings. Injections of ibotenic acid into MT caused striking elevations in motion thresholds, but had little or no effect on contrast thresholds. The results indicate that neural activity in MT contributes selectively to the perception of motion.
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Neurons in extrastriate cortex (areas MT and MST) carry critical sensory information about motion direction.
“A combination of recording, lesion, and stimulation studies has established that neurons in extrastriate cortex (areas MT and MST) carry critical sensory information about motion direction (Newsome and Pare, 1988;Salzman et al., 1990;1992;Britten et al., 1992;Celebrini and Newsome, 1994;1995).”
From Response of Neurons in the Lateral Intraparietal Area during a Combined Visual Discrimination Reaction Time Task (2002) · cites this paper as Newsome and Pare, 1988
The paper’s MT and motion processing section reports that MT lesions impair motion perception, supporting a critical role for MT. It also describes MST as containing many directionally selective neurons, but does not establish that MST carries information critical to motion-direction perception. (LLM, conf=0.85)
Experimental — accuracy not yet measuredMT provides at least some of the motion information used to form the direction decision.
“Thus, MT provides at least some of the motion information used to form the direction decision.”
From Neural correlates of perceptual learning in a sensory-motor, but not a sensory, cortical area (2008) · cites this paper as [18]
MT has an established role in task performance.
“the established role of MT in task performance16–19”
From Neural correlates of perceptual learning in a sensory-motor, but not a sensory, cortical area (2008) · cites this paper as [18]
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- Authors
- Newsome, W., & Pare, E.
- Affiliations
- Stony Brook University (US)
- Venue
- The Journal of Neuroscience
- Publisher
- Society for Neuroscience
- Published
- 1988-06-01
- Volume
- 8
- Issue
- 6
- Pages
- 2201-2211
- ISSN
- 0270-6474 (ISSN-L)
- 1529-2401
- PMC
- PMC6569328
- OpenAlex
- W2148916325
- Cited by
- 1,615
- References
- 40
- Citations by year
- 2026: 31 · 2025: 29 · 2024: 31 · 2023: 33 · 2022: 38 · 2021: 38 · 2020: 79 · 2019: 47 · 2018: 43 · 2017: 51 · 2016: 45 · 2015: 59 · 2014: 66 · 2013: 60 · 2012: 56
- FWCI
- 11.37
- Type
- journal article
- Language
- en
- Open access
- hybrid
- doi.org
- Licence
- Locations
- Journal of Neuroscience (publishedVersion, cc-by-nc-sa)
- Europe PMC (PubMed Central) (publishedVersion)
- PubMed Central (publishedVersion)
- PubMed (publishedVersion)
- Funders
- National Eye Institute (R01EY005603, R01-EY05603)
- Topics
- Life Sciences › Neuroscience › Cognitive Neuroscience › Visual perception and processing mechanisms
- Life Sciences › Neuroscience › Cognitive Neuroscience › Motor Control and Adaptation
- Social Sciences › Psychology › Experimental and Cognitive Psychology › Multisensory perception and integration
- Keywords
- middle temporal area, MT, motion perception, visual motion, chemical lesions, ibotenic acid, psychophysical thresholds, motion direction discrimination, contrast sensitivity, rhesus monkeys, cortical visual processing
- MeSH terms
- Animals, Macaca mulatta, Motion Perception, Perceptual Disorders, Psychophysics, Reference Values, Visual Cortex
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