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. 1981;319:497–514. doi: 10.1113/jphysiol.1981.sp013922

Striate cortex responses to periodic patterns with and without the fundamental harmonics

Duane G Albrecht 1,2, Russell L De Valois 1,2
PMCID: PMC1243852  PMID: 7320923

Abstract

1. The visual system has been modelled as a set of independent linear channels each tuned to a limited band of spatial frequency with the average bandwidth being approximately 1 octave. A great deal of psychophysical and physiological evidence supports this basic notion. However, Henning, Hertz & Broadbent (1975) have shown reciprocal masking between a fundamental frequency (1F) and a complex grating composed of higher harmonics several octaves removed ((4+5+6)F); their results clearly indicate a lack of independence.

2. We recorded the activity of cells in the striate cortex of monkeys and cats using stimuli similar to those of Henning et al. to make comparisons with their psychophysical data and to test specific physiological predictions.

3. We found that cells tuned to the fundamental frequency did not produce an excitatory response to the (4+5+6)F pattern. However, the response of such cells to 1F could be reduced by simultaneous presentation of (4+5+6)F. Similarly, the response of cells tuned to high frequencies, when presented with (4+5+6)F, was reduced by simultaneous presentation of 1F. However, this reciprocal inhibition could be produced between single harmonics (e.g. 1F and 4F) and was not dependent upon a special relationship between 1F and (4+5+6)F.

4. When cells tuned to high frequencies were presented with the (4+5+6)F pattern they generated predictable responses in the higher harmonics (4, 5, 6) but they also generated an unexpected, non-linear, response at the fundamental frequency, 1F, even though no such low frequency component was present in the stimulus. This effect is due to the response rectification which striate cells show.

5. In support of the linear independent spatial frequency channel model, we find (a) striate cells provide an excitatory response to only a limited range of frequencies, (b) they do not provide such responses to the `apparent' yet `missing' fundamental in the (4+5+6)F beating pattern, and (c) the response wave form to complex stimuli like (4+5+6)F is reasonably predictable (at least for simple cells) from the model. Against the model we find that (a) frequencies outside the excitatory bandpass can produce inhibition and (b) the rectification of the response wave form introduces harmonics not present in the stimulus.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

  1. Albrecht D. G., De Valois R. L., Thorell L. G. Visual cortical neurons: are bars or gratings the optimal stimuli? Science. 1980 Jan 4;207(4426):88–90. doi: 10.1126/science.6765993. [DOI] [PubMed] [Google Scholar]
  2. Blakemore C., Campbell F. W. On the existence of neurones in the human visual system selectively sensitive to the orientation and size of retinal images. J Physiol. 1969 Jul;203(1):237–260. doi: 10.1113/jphysiol.1969.sp008862. [DOI] [PMC free article] [PubMed] [Google Scholar]
  3. Campbell F. W., Cooper G. F., Enroth-Cugell C. The spatial selectivity of the visual cells of the cat. J Physiol. 1969 Jul;203(1):223–235. doi: 10.1113/jphysiol.1969.sp008861. [DOI] [PMC free article] [PubMed] [Google Scholar]
  4. Campbell F. W., Robson J. G. Application of Fourier analysis to the visibility of gratings. J Physiol. 1968 Aug;197(3):551–566. doi: 10.1113/jphysiol.1968.sp008574. [DOI] [PMC free article] [PubMed] [Google Scholar]
  5. De Valois K. K., De Valois R. L., Yund E. W. Responses of striate cortex cells to grating and checkerboard patterns. J Physiol. 1979 Jun;291:483–505. doi: 10.1113/jphysiol.1979.sp012827. [DOI] [PMC free article] [PubMed] [Google Scholar]
  6. De Valois K. K. Spatial frequency adaptation can enhance contrast sensitivity. Vision Res. 1977;17(9):1057–1065. doi: 10.1016/0042-6989(77)90010-4. [DOI] [PubMed] [Google Scholar]
  7. De Valois R. L., De Valois K. K. Spatial vision. Annu Rev Psychol. 1980;31:309–341. doi: 10.1146/annurev.ps.31.020180.001521. [DOI] [PubMed] [Google Scholar]
  8. HUBEL D. H., WIESEL T. N. Receptive fields, binocular interaction and functional architecture in the cat's visual cortex. J Physiol. 1962 Jan;160:106–154. doi: 10.1113/jphysiol.1962.sp006837. [DOI] [PMC free article] [PubMed] [Google Scholar]
  9. Henning G. B., Hertz B. G., Broadbent D. E. Some experiments bearing on the hypothesis that the visual system analyses spatial patterns in independent bands of spatial frequency. Vision Res. 1975 Aug-Sep;15:887–897. doi: 10.1016/0042-6989(75)90228-x. [DOI] [PubMed] [Google Scholar]
  10. Hubel D. H., Wiesel T. N. Receptive fields and functional architecture of monkey striate cortex. J Physiol. 1968 Mar;195(1):215–243. doi: 10.1113/jphysiol.1968.sp008455. [DOI] [PMC free article] [PubMed] [Google Scholar]
  11. Kelly D. H. Pattern detection and the two-dimensional fourier transform: flickering checkerboards and chromatic mechanisms. Vision Res. 1976;16(3):277–287. doi: 10.1016/0042-6989(76)90111-5. [DOI] [PubMed] [Google Scholar]
  12. Maffei L., Fiorentini A. The visual cortex as a spatial frequency analyser. Vision Res. 1973 Jul;13(7):1255–1267. doi: 10.1016/0042-6989(73)90201-0. [DOI] [PubMed] [Google Scholar]
  13. Maffei L., Morrone C., Pirchio M., Sandini G. Responses of visual cortical cells to periodic and non-periodic stimuli. J Physiol. 1979 Nov;296:27–47. doi: 10.1113/jphysiol.1979.sp012989. [DOI] [PMC free article] [PubMed] [Google Scholar]
  14. Maffei L., Morrone C., Pirchio M., Sandini G. Visual cortical cells as spatial frequency analysers [proceedings]. J Physiol. 1977 Oct;272(1):89P–90P. [PubMed] [Google Scholar]
  15. Movshon J. A., Thompson I. D., Tolhurst D. J. Receptive field organization of complex cells in the cat's striate cortex. J Physiol. 1978 Oct;283:79–99. doi: 10.1113/jphysiol.1978.sp012489. [DOI] [PMC free article] [PubMed] [Google Scholar]
  16. Movshon J. A., Thompson I. D., Tolhurst D. J. Spatial and temporal contrast sensitivity of neurones in areas 17 and 18 of the cat's visual cortex. J Physiol. 1978 Oct;283:101–120. doi: 10.1113/jphysiol.1978.sp012490. [DOI] [PMC free article] [PubMed] [Google Scholar]
  17. Movshon J. A., Thompson I. D., Tolhurst D. J. Spatial summation in the receptive fields of simple cells in the cat's striate cortex. J Physiol. 1978 Oct;283:53–77. doi: 10.1113/jphysiol.1978.sp012488. [DOI] [PMC free article] [PubMed] [Google Scholar]
  18. Nachimias J., Sansbury R., Vassilev A., Weber A. Adaptation to square-wave gratings: in search of the elusive third harmonic. Vision Res. 1973 Jul;13(7):1335–1342. doi: 10.1016/0042-6989(73)90209-5. [DOI] [PubMed] [Google Scholar]
  19. Schiller P. H., Finlay B. L., Volman S. F. Quantitative studies of single-cell properties in monkey striate cortex. III. Spatial frequency. J Neurophysiol. 1976 Nov;39(6):1334–1351. doi: 10.1152/jn.1976.39.6.1334. [DOI] [PubMed] [Google Scholar]
  20. Tolhurst D. J. Adaptation to square-wave gratings: inhibition between spatial frequency channels in the human visual system. J Physiol. 1972 Oct;226(1):231–248. doi: 10.1113/jphysiol.1972.sp009982. [DOI] [PMC free article] [PubMed] [Google Scholar]
  21. Tolhurst D. J., Barfield L. P. Interactions between spatial frequency channels. Vision Res. 1978;18(8):951–958. doi: 10.1016/0042-6989(78)90023-8. [DOI] [PubMed] [Google Scholar]

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