Attention and Neurodynamical Correlates of Natural Vision
In the last decade, several lines of evidence have demonstrated that most sensory systems and particularly the visual system are intensely subject to dynami¬cal top-down influences that depend on the current behavior of the organism. During natural vision, eye movements and neuronal activity in many visual areas are dependent on attention and goal-directed actions of the organism. Yet, current models of visual perception are mainly based on studies that have examined neuro-nal activity using very simple stimuli, or restrictive behavioral conditions. Moreover, current receptive field models based on these studies appear to fail when they are tested during experiments that used natural stimuli or complex visual behavior. In this chapter, we discuss new evidence showing that the classical receptive field is an incomplete description of the response of neurons in the visual system, largely because we have overlooked top-down influences in neuronal activity and behavior. We argue that the use of natural stimuli and natural behaviors such as free viewing, by including attention and other top-down mechanisms, can provide new insights into the neurodynamical correlates of visual perception.
KeywordsVisual System Receptive Field Visual Perception Natural Image Lateral Geniculate Nucleus
Unable to display preview. Download preview PDF.
- Aminoff, E., Gronau, N., & Bar, M. (2007b). The parahippocampal cortex mediates spatial and nonspatial associations.CerebralCortex, 17, 1493–1503Google Scholar
- Barlow, H. B. (1961). Possible principles underlying the transformations of sensory images. In W. A. Rosenblith (Ed.)Sensory communication(pp. 217–234). Cambridge, MA: MITGoogle Scholar
- Cohen, J. (2002). The grand grand illusion illusion.Journal of Consciousness Studies, 9, 141–157Google Scholar
- Levin, D. T. & Simons, D. J. (1997). Failure to detect changes to attended objects in motion pictures.Psychonomic Bulletin and Review, 4, 501–506Google Scholar
- Motter, B. C. (1993). Focal attention produces spatially selective processing in visual cortical areas V1, V2, and V4 in the presence of competing stimuli. Journal of Neurophysiol, 70, 909–919Google Scholar
- Noe, A. (2002). Is the visual world a grand illusion? Journal of Consciousness Studies,9, 1–12Google Scholar
- Simons, D. J. & Levin, D. T. (1998). Failure to detect changes to people during a real-world interaction. Psychonomic Bulletin and Review,5, 644–649Google Scholar
- Yarbus, A. L. (1967). Eye movements and vision. New York: PlenumGoogle Scholar