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

Visual Neuroscience - Tập 2 Số 6 - Trang 609-620 - 1989
Alan Saul1, M. Cynader2
1Department of Neurobiology, Anatomy, and Cell Science, University of Pittsburgh, Pittsburgh
2Department of Ophthalmology, University of British Columbia, British Columbia

Tóm tắt

AbstractAdaptation-induced changes in the temporal-frequency tuning and direction selectivity of cat visual cortical cells were studied. Aftereffects were induced largely independent of direction. Adapting in either direction reduced responses in both directions. Aftereffects in the direction opposite that adapted were only slightly weaker than were aftereffects in the adapted direction. No cell showed any enhancement of responses to drifting test stimuli after adapting with moving gratings. Adapting in a cell's null direction usually had no effect. Dramatic differences between the adaptation characteristics of moving and stationary stimuli were observed, however.Furthermore, aftereffects were temporal frequency specific. Temporal frequency-specific aftereffects were found in both directions: adapting in one direction induced frequency-specific effects in both directions. This bidirectionality of frequency-specific aftereffects applied to the spatial domain as well. Often, aftereffects in the direction opposite that adapted were more narrowly tuned.In general, adaptation could shift a cell's preferred temporal frequency. Aftereffects were most prominent at high temporal frequencies when testing in the adapted direction. Aftereffects seemed to be more closely linked to temporal frequency than to velocity matching.These results constrain models of cortical connectivity. In particular, we argue against schemes by which direction selectivity is generated by inhibiting a cell specifically when stimulated in the nonpreferred direction. Instead, we argue that cells receive bidirectional spatially and temporally tuned inputs, which could combine in spatiotemporal quadrature to produce direction selectivity.

Từ khóa


Tài liệu tham khảo

10.1016/0022-5193(75)90085-5

10.1364/JOSAA.2.000322

von der Heydt, 1978, Movement aftereffects in the visual cortex, Archives of Italian Biology, 116, 248

10.1016/0042-6989(83)90166-9

10.1113/jphysiol.1977.sp012021

10.1113/jphysiol.1981.sp013856

10.1126/science.3952502

10.1016/0042-6989(73)90088-6

10.1126/science.139.3553.419

10.1017/S0952523800003527

Saul, 1986, Modeling and simulation. II: Specificity models for visual cortex development, Journal of Electrophys-iological Techniques, 13, 211

Reichardt, 1961, Sensory Communication, 303

10.1016/0042-6989(69)90087-X

10.1152/jn.1985.54.3.651

10.1016/0042-6989(85)90171-3

10.1038/278850a0

10.1152/jn.1987.57.2.381

10.1152/jn.1988.59.4.1314

10.1016/0042-6989(84)90020-8

10.1152/jn.1986.55.5.966

10.1016/0042-6989(76)90176-0

10.1038/254692a0

10.1152/jn.1985.54.4.1026

10.1002/cne.902680311

10.1016/0042-6989(76)90235-2

10.1016/0042-6989(83)90113-X

10.1113/jphysiol.1970.sp009238

10.1113/jphysiol.1969.sp008862

10.1364/JOSAA.2.000284

10.1016/0042-6989(81)90161-9

10.1007/BF00234599

Movshon, 1980, Pattern adaptation in striate cortical neurons, Investigative Ophthalmology and Visual Science, 21, 193

10.1113/jphysiol.1972.sp009982

10.1364/JOSAA.1.000451

Julesz, 1971, Foundations of Cyclopean Perception

10.1016/0042-6989(86)90039-8

Saul, 1985, Adaptation effects from conditioning area 17 cortical units in kittens during physiological recording, Society for Neuroscience Abstracts, 11, 461

10.1113/jphysiol.1974.sp010652

10.1007/BF00248495

10.1016/0042-6989(86)90014-3

10.1113/jphysiol.1984.sp015092

10.1007/BF00235938

10.1364/JOSAA.2.000300

10.1016/0042-6989(74)90221-1

10.1098/rspb.1982.0076

Hebb, 1949, The Organization of Behavior

10.1007/BF00235746

10.1152/jn.1977.40.5.1051

SAUL, 1982, Development and mechanisms of visual cortical specificity, Society for Neuroscience Abstracts, 8, 296

10.1126/science.149.3688.1115

Thông tin
Thông tin xuất bản

Visual Neuroscience

Tập 2 Số 6

609-620

Thông tin tác giả