Lability of Directional Tuning and Ocular Dominance of Complex Cells in the Cat’s Visual Cortex
Part of the
NATO Advanced Study Institutes Series
book series (NSSA, volume 27)
Directional specificity and ocular dominance for motion of bar stimuli against stationary textured backgrounds, and for motion of the same random texture alone, were assessed in 62 complex cells from the infragranular layers of the striate cortex in normal adult cats, lightly anesthetized with N2O/O2 and pentobarbitone.
Directional bias for preferred versus opposite directions of motion was enhanced with texture; two-thirds of cells directionally biased for bars were directionally selective for texture.
A majority of cells (52) showed substantial differences in preferred directions for bar and texture motion. Tuning for texture was typically broader than for bars; 22 cells showed bimodal tuning for texture, with depressed sensitivity in directions preferred for bars. Bar tuning was frequently broader on the flank of the tuning curve nearest the preferred direction for texture. Many cells, especially those with large receptive fields, were more responsive to texture than to bar motion.
Eleven cells showed interocular differences in sharpness and bias of directional tuning for texture; bar/texture tuning relationships were otherwise replicated in each eye.
Ocular dominance for bars and texture was compared in 31 cells; 14 showed stimulus-dependent shifts of up to three ocular dominance groups, with reversal of eye preference in three cases. There were no trends favoring ipsilateral or contralateral inputs, or increased binocularity for texture motion.
The results are interpreted as evidence that directional and orientational sensitivity are mediated by separate mechanisms, not necessarily in register for the two eyes.
KeywordsComplex Cell Tuning Curve Striate Cortex Ocular Dominance Directional Tuning
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
Andrews, D. P., P. Hammond, and C. R. James (1975). Absence of spontaneous variability of orientational and directional tuning in cat visual cortical cells. J. Physiol. 251:49–50P.Google Scholar
Duffy, F. H., S. R. Snodgrass, J. L. Burchfiel, and J. L. Conway (1976). Bicuculline reversal of deprivation amblyopia in the cat. Nature 260:256–257.PubMedCrossRefGoogle Scholar
Gilbert, C. D. (1977). Laminar differences in receptive field properties of cells in cat primary visual cortex. J. Physiol. 268:391–421.PubMedGoogle Scholar
Groos, G. A., P. Hammond, and D. M. MacKay (1976). Polar responsiveness of complex cells in cat striate cortex to motion of bars and of textured patterns. J. Physiol. 260: 47–48P.Google Scholar
Hammond, P. (1978a). On the use of nitrous oxide/oxygen mixtures for anaesthesia in cats. J. Physiol. 275:64P.PubMedGoogle Scholar
Hammond, P. (1978b). Inadequacy of nitrous oxide/oxygen mixtures for maintaining anaesthesia in cats: satisfactory alternatives. Pain 5:143–151.PubMedCrossRefGoogle Scholar
Hammond, P. (1978c). Lability of ocular dominance of complex cells in cat striate cortex. Exp. Brain Res. 32:R18.Google Scholar
Hammond, P. (1978d). Directional tuning of complex cells in cat striate cortex. Neurosci. Letters, Suppl. 1.S373.Google Scholar
Hammond, P. (1978e). Directional tuning of complex cells in area 17 of the feline visual cortex. J. Physiol. 285:479–491.PubMedGoogle Scholar
Hammond, P. (1979). Stimulus-dependence of ocular dominance and directional tuning of complex cells in area 17 of the feline visual cortex. Exp. Brain Res. 35 (in press).Google Scholar
Hammond, P., and D. P. Andrews (1978a). Orientation tuning of cells in areas 17 and 18 of the cat’s visual cortex. Exp. Brain Res. 31:341–351.PubMedGoogle Scholar
Hammond, P., and D. P. Andrews (1978b). Collinearity tolerance of cells in areas 17 and 18 of the cat’s visual cortex: relative sensitivity to straight lines and chevrons. Exp. Brain. Res. 31:329–339.PubMedGoogle Scholar
Hammond, P., D. P. Andrews, and C. R. James (1975). Invariance of orientational and directional tuning in visual cortical cells of the adult cat. Brain Res. 96: 56–59.PubMedCrossRefGoogle Scholar
Hammond, P., and D. M. MacKay (1975a). Differential responses of cat visual cortical cells to textured stimuli. Exp. Brain Res. 23:427–430.CrossRefGoogle Scholar
Hammond, P., and D. M. MacKay (1975b). Responses of cat visual cortical cells to kinetic contours and static noise. J. Physiol. 252:43–44P.Google Scholar
Hammond, P., and D. M. MacKay (1976). Interrelations between cat visual cortical cells revealed by use of textured stimuli. Exp. Brain Res., Suppl. 1:397–402.Google Scholar
Hammond, P., and D. M. MacKay (1977). Differential responsiveness of simple and complex cells in cat striate cortex to visual texture. Exp. Brain Res. 30:275–296.PubMedCrossRefGoogle Scholar
Henry, G. H., P. O. Bishop, and B. Dreher (1974a). Orientation, axis, and direction as stimulus parameters for striate cells. Vision Res. 14:767–778.PubMedCrossRefGoogle Scholar
Henry, G. H., B. Dreher, and P. O. Bishop (1974b). Orientation specificity of cells in cat striate cortex. J. Neurophysiol. 37:1394–1409.PubMedGoogle Scholar
Hubel, D. H., and T. N. Wiesel (1970). The period of susceptibility to the physiological effects of unilateral eye closure in kittens. J. Physiol. 206:419–436.PubMedGoogle Scholar
Hubel, D. H., T. N. Wiesel, and S. LeVay (1975). Functional architecture of area 17 in normal and monocularly deprived macaque monkeys. Cold Spring Harb. Symp. Quant. Biol. 40: 581–590.CrossRefGoogle Scholar
Hubel, D. H., T. N. Wiesel, and S. LeVay (1976). Columnar organization of area 17 in normal and monocularly deprived macaque monkeys. Exp. Brain Res., Suppl. 1:356–361.Google Scholar
Kratz, K. E., P. D. Spear, and D. C. Smith (1976). Post-critical period reversal of effects of monocular deprivation on striate cortex cells in the cat. J. Neurophysiol. 39: 501–511.PubMedGoogle Scholar
LeVay, S., D. H. Hubel, and T. N. Wiesel (1975). The pattern of ocular dominance columns in macaque visual cortex revealed by reduced silver stain. J. Comp. Neurol. 159: 559–576.PubMedCrossRefGoogle Scholar
LeVay, S., M. P. Stryker, and C. J. Shatz (1978). Ocular dominance columns and their development in layer IV of the cat’s visual cortex: a quantitative study. J. Comp. Neurol. 179:223–244.PubMedCrossRefGoogle Scholar
MacKay, D. M., and S. R. Yates (1975). Textured kinetic stimuli for use in visual neurophysiology: an inexpensive and versatile electronic display. J. Physiol. 252:10–11p.Google Scholar
Patel, H. H., and A. M. Sillito (1978). Inhibition and the normal ocular dominance distribution in cat visual cortex. J. Physiol. 280:48–49P.Google Scholar
Sillito, A. M. (1975). The contribution of inhibitory mechanisms to the receptive field properties of neurones in the striate cortex of the cat. J. Physiol. 250:305–329.PubMedGoogle Scholar
Sillito, A. M. (1977). Inhibitory processes underlying the directional specificity of simple, complex, and hypercomplex cells in the cat’s visual cortex. J. Physiol. 271:699–720.PubMedGoogle Scholar
Wiesel, T. N., and D. H. Hubel (1963). Single-cell responses in striate cortex of kittens deprived of vision in one eye. J. Neurophysiol. 26:1003–1017.PubMedGoogle Scholar
Wiesel, T. N., and D. H. Hubel (1965). Comparison of the effects of unilateral and bilateral eye closure on cortical unit responses in kittens. J. Neurophysiol. 28:1029–1040.PubMedGoogle Scholar
Wiesel, T. N., D. H. Hubel, and D. M. K. Lam (1974). Autoradiographic demonstration of ocular-dominance columns in the monkey striate cortex by means of transneuronal transport. Brain Res. 79:273–279.PubMedCrossRefGoogle Scholar
© Plenum Press, New York 1979