Lateral geniculate nucleus

RETINA: RECEPTOR CELLS The receptor cells are the RODS and CONES. Each consists of: * A process consisting of outer and inner segments. * An external fiber connecting the process with the soma. * A soma or body containing the nucleus. * An inner fiber that resembles an axon and synapses with a bipolar cell. Rods are extremely sensitive to light and can react to a single photon. The light is absorbed by the pigment rhodopsin and the energy acquired results in decrease

Vision and Blindsight Implications Regarding Consciousness Vision-- receiving and interpreting light signals from the environment in order to form an image in one's mind-- is an incredibly complex process. Somehow signals from photoreceptors located in the eye are converted into the conscious experience of sight. Of all the aspects of vision, perhaps the most difficult for us to comprehend scientifically is this notion of consciousness. Somehow the brain interprets light waves hitting the retina

Neurology and Neurosurgery Neurology Overview Although our primary interest is with the Medial Temporal Lobe, also called the V5 area, a discussion of the entire motion perception pathway is instructive. Motion perception actually begins with the specialized visual receptors in the retina known as M-cells (from the Latin word magnus, for large). As the name implies, the M-cells are relatively large, located in the peripheral retina, and respond quickly to transient visual stimulation

Amblyopia This paper provides a brief description of amblyopia and discusses current research regarding the motion pathway in individuals with amblyopia. Amblyopia is a condition in which visual acuity in one eye is greatly reduced. It is caused by lack of stimulation or disuse during visual development (Rose, 1998). Because the eye is not fully developed at birth (Jarvis, 1992, as cited in Rose, 1998), infants need stimulation to complete the visual neural pathway. When one or both eyes

This essay will be focusing on the exploration of the theory of speed reading. Will the practice of speed reading effectively aid individuals in increasing they're reading speed, in a positive way that individuals will benefit in the long term? Will this process also effectively increase the understanding and retaining of the information from a text that is read by an individual, will the benefits or improvement be evident in subjects that partake in this skill development ? This essay will include

Q1: The main pathway of color vision is as following: light⇒photoreceptor⇒ bipolar cell ⇒Ganglion cell⇒ LGN ⇒ cortex⇒ extracortex. Here I will stress some key points of color vision. 1) photoreceptors ( mainly cones, because rods are sensitive to low light level and blind to color) absorb light, and through photochemical reactions transfer solar energy to electrical energy which can be indirectly displayed as action potential of cells. There are three cones: L, M, S cones respectively. L cones

Introduction In 1981, D.H Hubel and T.N Wiesel were awarded half of the Nobel prize in Physiology or Medicine, along with R.W. Sperry who received the other half. The two had been conducting experiments and publishing their findings together for over twenty years, before they were awarded the Nobel prize for “their discoveries concerning information processing in the visual system.” They produced many reports including single and complex cells, and ocular dominance. Their work provided better understanding

Blindsight and Qualities of Visual Perception ABSTRACT: The aim of this paper is to defend a broad concept of visual perception, according to which it is a sufficient condition for visual perception that subjects receive visual information in a way which enables them to give reliably correct answers about the objects presented to them. According to this view, blindsight, non-epistemic seeing, and conscious visual experience count as proper types of visual perception. This leads to two consequences

Perception is based on ones ability to convert physical stimuli into behavioral responses. The processes of perception can be viewed as fluid always free flowing. Physical stimuli being sent to the brain being converted into information an in return a behavioral response is expressed. When the brain suffers brain damage a lesion is caused and the brains elasticity will work around the lesion so the brain can still function. However, the lesion is still in the brain. Visual recognition is selective

Executive summary This essay is going to talk about the relationship between shooting a basketball and the human visual perception. Based on the research about visual control for basketball shooting and how to aim the rim can increase the hit rate to explain how the visual control relate to the basketball shooting. There are many researchers done some experiments about that, and come up with some idea relate with human’s visual perception. This essay is divide to different parts, at first this