Question

How do we process visual stimuli? According to what kind of model or theory? What is the neurological basis for that kind of a model?

Answer 1

Vision- vision is the act of sensing a small section of electromagnetic waves referred as light, is made possible because of the eye’s unique structure. Light rays enter the eyes through the cornea and lens, which focus an image on retina. The recognition of pattern, weather a simple two dimensional black and white form or a three dimensional complex coloured form. The visual system is one of the most complex of all sensory systems.

Cones and Rods- a human eye has about 7 million cones, which are sensitive to well-illuminated stimuli, and 125 million rods, which are sensitive to poorly illuminated stimuli. Cones are concentrated in the fovea and rods are away from fovea.

Visual Stimuli- The visual stimuli are the kind of images which form on retina, every concrete thing can be visual stimuli.

Processing of visual stimuli- the processing of visual stimuli influenced by our experiences, emotion, physical condition and illusions. Brain process information and compare them with other sensory information and if the all information appears to be similar the brain use memory to store the information for next use.

Illusions- the distinction between sensations and the perceived interpretation of those experiences, in effect between what our sensory system receives and what our mind interprets.

Neurological perspectives of Vision- the sensory system is composed of the receptors and connecting neurons of the five senses. Each of these senses has, to a greater or lesser degree.

Perception- perception involves the higher-order cognition in the interpretation of the sensory information.

The brain processes signals received from senses and use the prior knowledge, experiences and emotion too, after the parallel processing we get actual and understandable information.