Skip to main content
×
×
Home

Adaptation in single units in visual cortex: The tuning of aftereffects in the spatial domain

  • A. B. Saul (a1) and M. S. Cynader (a2)
Abstract
Abstract

Cat striate cortical neurons were investigated using a new method of studying adaptation aftereffects. Stimuli were sinusoidal gratings of variable contrast, spatial frequency, and drift direction and rate. A series of alternating adapting and test trials was presented while recording from single units. Control trials were completely integrated with the adapted trials in these experiments.

Every cortical cell tested showed selective adaptation aftereffects. Adapting at suprathreshold contrasts invariably reduced contrast sensitivity. Significant aftereffects could be observed even when adapting at low contrasts.

The spatial-frequency tuning of aftereffects varied from cell to cell. Adapting at a given spatial frequency generally resulted in a broad response reduction at test frequencies above and below the adapting frequency. Many cells lost responses predominantly at frequencies lower than the adapting frequency.

The tuning of aftereffects varied with the adapting frequency. In particular, the strongest aftereffects occurred near the adapting frequency. Adapting at frequencies just above the optimum for a cell often altered the spatial-frequency tuning by shifting the peak toward lower frequencies. The fact that the tuning of aftereffects did not simply match the tuning of the cell, but depended on the adapting stimulus, implies that extrinsic mechanisms are involved in adaptation effects.

Copyright
References
Hide All
Albrecht D.G., Farrar S.B. & Hamilton D.B. (1984). Spatial contrast adaptation characteristics of neurons recorded in the cat's visual cortex. Journal of Physiology 347, 713739.
Blakemore C. & Campbell F.W. (1969). On the existence of neurons in the human visual system selectively sensitive to the orientation and size of retinal images. Journal of Physiology 203, 237260.
Dealy R.S. & Tolhurst D.J. (1974). Is spatial adaptation an aftereffect of prolonged inhibition? Journal of Physiology 241, 261270.
Dean A.F. (1981). The relationship between response amplitude and contrast for cat striate cortical neurones. Journal of Physiology 318, 413427.
Dean A.F. (1983). Adaptation-induced alteration of the relation between response amplitude and contrast in cat striate cortical neurones. Vision Research 23, 249256.
Hammond P., Mouat G.S.V. & Smith A.T. (1985). Motion aftereffects in cat striate cortex elicited by moving gratings. Experimental Brain Research 60, 411416.
Hammond P., Mouat G.S.V. & Smith A.T. (1986). Motion aftereffects in cat striate cortex elicited by moving texture. Vision Research 26, 10551060.
Keck M.J., Palella T.D. & Pantle A. (1976). Motion aftereffect as a function of the contrast of sinusoidal gratings. Vision Research 16, 187191.
Legge G.E. (1976). Adaptation to a spatial impulse: implications for Fourier transform models of visual processing. Vision Research 16, 14071418.
Maffei L., Fiorentini A. & Bisti S. (1973). Neural correlates of perceptual adaptation to gratings. Science 182, 10361039.
Maffei L., Berardi N. & Bisti S. (1986). Interocular transfer of adaptation aftereffect in neurons of area 17 and 18 of split chiasm cats. Journal of Neurophysiology 55, 966976.
Marlin S.G., Hasan S.J. & Cynader M.S. (1986). Interocular transfer of direction-selective adaptation in cat striate cortex cells. Society for Neuroscience Abstracts 12, 433.
Marlin S.G., Hasan S.J. & Cynader M.S. (1988). Direction-selective adaptation in simple and complex cells in cat striate cortex. Journal of Neurophysiology 59, 13141330.
Movshon J.A. & Lennie P. (1979). Pattern-selective adaptation in visual cortical neurones. Nature 278, 850852.
Movshon J.A., Bonds A.B. & Lennie P. (1980). Pattern adaptation in striate cortical neurons. Investigative Ophthalmology and Visual Science (Suppl.) 21, 193.
Ohzawa I., Sclar G. & Freeman R.D. (1982). Contrast gain control in the cat visual cortex. Nature 298, 266268.
Ohzawa I., Sclar G. & Freeman R.D. (1985). Contrast gain control in the cat's visual system. Journal of Neurophysiology 54, 651667.
Pantle A. & Sekuler R. (1968). Size-detecting mechanisms in human vision. Science 162, 11461148.
Regan D. & Beverly K.I. (1985). Postadaptation orientation discrimination. Journal of the Optical Society of America A 2, 147155.
Saul A.B. & Daniels J.D. (1985). Adaptation effects from conditioning area 17 cortical units in kittens during physiological recording. Society for Neuroscience Abstracts 11, 461.
Saul A.B. & Cynader M.S. (1989). Adaptation in single units in visual cortex: the tuning of aftereffects in the temporal domain. Visual Neuroscience 2, 609620.
Sclar G., Ohzawa I. & Freeman R.D. (1985). Contrast gain control in the kitten's visual system. Journal of Neurophysiology 54, 668675.
Vautin R.G. & Berkley M.A. (1977). Responses of single cells in cat visual cortex to prolonged stimulus movement: neural correlates of visual aftereffects. Journal of Neurophysiology 40, 10511065.
von der Heydt R., Hänny P. & Adorjani C. (1978). Movement aftereffects in the visual cortex. Archives of Italian Biology 116, 248254.
Wilson H.R. & Regan D. (1984). Spatial-frequency adaptation and grating discrimination: predictions of a line-element model. Journal of the Optical Society of America A 1, 10911096.
Recommend this journal

Email your librarian or administrator to recommend adding this journal to your organisation's collection.

Visual Neuroscience
  • ISSN: 0952-5238
  • EISSN: 1469-8714
  • URL: /core/journals/visual-neuroscience
Please enter your name
Please enter a valid email address
Who would you like to send this to? *
×

Keywords:

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 8 *
Loading metrics...

Abstract views

Total abstract views: 226 *
Loading metrics...

* Views captured on Cambridge Core between September 2016 - 17th December 2017. This data will be updated every 24 hours.