Abstract
Directional and orientational components usually coexist and are mixed in the cell's overall responses when moving optical stimuli are used to study the response characteristics of visual neurons. While these two properties were quantified with all the previous methods for data analysis, their effects could not be efficiently separated from each other, and thus the analyses were imperfect. In this paper, theoretical evidence and examples are provided to show the defects of the old methods. In order to separate the two components completely, we propose to apply optimal regression analysis with the sine-cosine function series as the fundamental variables. Based on this separation, we defined the orientational selectivity as variation of response strength with orientation and performed integration and averaging to quantify the two properties [cf. Eqs. (5) and (6)]. The present method has the advantages of completeness and accuracy, and can detect some details which would have been missed by other methods. An explanation of the intrinsic implications of the method and our comprehension of directional and orientational selectivities and preferred direction and orientation are also given.
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References
Albright TD (1984) Direction and orientation selectivity of neurons in visual area MT of the macaque. J Neurophysiol 52:1106–1130
Baker JF, Petersen SE, Newsome WT, Allman JM (1981) Visual response properties of neurons in four extrastriate visual areas of the owl monkey (Aotus trivirgarus): a quantitative comparison of the medial, dorsolateral, and middle temporal areas. J Neurophysiol 45:397–416
Batschelet E (1981) Circular statistics in biology. Academic Press, New York
Berman N, Wilkes ME, Payne BR (1987) Organization of orientation and direction selectivity in areas 17 and 18 of cat cerebral cortex. J Neurophysiol 58:676–699
De Valois RL, Yund EW, Hepler N (1982) The orientation and direction selectivity of cells in macaque visual cortex. Vision Res 22:531–544
Eysel UT, Muche T, Worgotter F (1988) Lateral interactions at direction-selective striate neurons in the cat demonstrated by local cortical inactivation. J Physiol (Lond) 399:657–675
Eysel UT, Crook JM, Machemer HF (1990) GABA-induced remote inactivation reveals cross-orientation inhibition in the cat striate cortex. Exp Brain Res 80:626–630
Hammond P (1978) Directional tuning of complex cells in area 17 of the feline visual cortex. J Physiol (Lond) 285:479–491
Henry GH, Bishop PO, Tupper RM, Dreher B (1973) Orientation specificity and response variability of cells in the striate cortex. Vision Res 13:1771–1779
Henry GH, Bishop PO, Dreher B (1974) Orientation, axis and direction as stimulus parameters for striate cells. Vision Res 14:767–777
Levick WR, Thibos LN (1982) Analysis of orientation bias in cat retina. J Physiol (Lond) 329:243–261
Mikami A, Newsome WT, Wurtz RH (1986) Motion selectivity in macaque visual cortex. I. Mechanisms of direction and speed selectivity in extrastriate area MT. J Neurophysiol 55:1308–1327
Nelson JI, Kato H, Bishop PO (1977) Discrimination of orientation and position disparities by binocularly activated neurons in cat striate cortex. J Neurophysiol 40:260–283
Orban GA (1984) Neuronal operations in the visual cortex. Springer, Berlin Heidelberg New York
Sillito AM (1977) Inhibitory processes underlying the directional specificity of simple, complex and hypercomplex cells in the cat's visual cortex. J Physiol (Lond) 271:699–720
Sillito AM (1979) Inhibitory mechanisms influencing complex cells orientation selectivity and their modification at high resting discharge levels. J Physiol (Lond) 289:33–53
Thibos LN, Levick WR (1985) Orientation bias of brisk-transient Y-cells of the cat retina for drifting and alternating gratings. Exp Brain Res 58:1–10
Worgotter F, Eysel UT (1987) Quantitative determination of orientational and directional components in the response of visual cortical cells to moving stimuli. Biol Cybern 57:349–355
Worgotter F, Eysel UT (1991a) Axial responses in visual cortical cells: spatio-temporal mechanisms quantified by Fourier components of cortical tuning curves. Exp Brain Res 83:656–664
Worgotter F, Eysel UT (1991b) Topographical aspects of intracortical excitation and inhibition contributing to orientation specificity in area 17 of the cat visual cortex. Eur J Neurosci 3:1232–1244
Worgotter F, Koch C (1991) A detailed model of the primary visual pathway in the cat: comparison of afferent excitatory and intracortical inhibitory connection schemes for orientation selectivity. J Neurosci 11:1959–1979
Worgotter F, Grundel O, Eysel UT (1990) Quantification and comparison of cell properties in cat's striate cortex determined by different types of stimuli. Eur J Neurosci 2:928–941
Worgotter F, Muche T, Eysel UT (1991) Correlations between directional and orientational tuning of cells in cat striate cortex. Exp Brain Res 83:665–669
Zhang J (1990) How to unconfound the directional and orientational information in visual neuron's response. Biol Cybern 63:135–142
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Li, B., Wang, Y. & Diao, Y. Quantification of directional and orientational selectivities of visual neurons to moving stimuli. Biol. Cybern. 70, 281–290 (1994). https://doi.org/10.1007/BF00197609
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DOI: https://doi.org/10.1007/BF00197609