Neurones recording during penetrations through cat area 17 as near parallel to the radial fibre bundles as possible have been quantitatively tested as to their optimal orientation. Optimal orientation within any one penetration was similar though considerable variability was observed. Histological r
Non-linearities of temporal summation in neurones in area 17 of the cat
β Scribed by D. J. Tolhurst; N. S. Walker; I. D. Thompson; A. F. Dean
- Publisher
- Springer-Verlag
- Year
- 1980
- Tongue
- English
- Weight
- 520 KB
- Volume
- 38
- Category
- Article
- ISSN
- 0014-4819
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β¦ Synopsis
Sinusoidal temporal modulation of the contrast of sinusoidal gratings has been used to provide one description of the temporal properties of neurones in area 17 of the cat's visual cortex. Concurrently, the waveforms of the neurones' responses to 2 s flashes of identical gratings were examined. In most neurones, the response to the long flash was much more transient than would be expected from the shape of the temporal-frequency tuning curve. Temporal summation in cortical neurones is non-linear.
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In cats, 131 area 18 units with receptive fields 10-50 degrees from the visual axis, were recorded and tested with moving stimuli. These stimuli included light slits, dark bars, single edges, gratings and a random square pattern. 94% of the units were responsive to visual motion. 106 neurones could
In cats, 107 area 18 neurones with identified FR type, 10-50 degrees from the visual axis, were tested for the influence of direction, velocity and amplitude of movement. These three parameters are believed to be the primary parameters of a movement analysing system. 94% of the neurones were influen