This article was originally published on BioInteractive. From the ganglion cells, signals then travel through the optic nerve to the visual areas of the brain.Īll vertebrate eyes, from mice to humans, share this basic three-layered structure of the retina, which allows us to see the world around us. Two other types of cells in the middle layer-the horizontal interneurons and amacrine cells, both colored blue-also contribute to processing and relaying visual information. Like a relay station, the long bipolar interneuron cells (colored green) spanning the middle layer, receive the signals from the photoreceptors and transmit them to the ganglion cells (blue) in the front retinal layer (bottom of the image). The cones, which detect bright-colored light, are the other type of photoreceptors (not shown). The red-colored photoreceptor cells in the image are the rods, which detect dim light. The cells that detect the light, the photoreceptors, are in the layer at the back of the eye (which is the top of this image), so that incoming light travels through the other two layers to reach them. ![]() But the arrangement of the layers is the reverse of what one might expect. Observing the mouse retina through a microscope reveals a structure like a three-layer cake, with each layer made up of different nerve cells that sequentially receive, process, and relay information. In the mouse, it’s no thicker than 0.5 mm, about the width of three sheets of paper. When light from the outside enters the eye, it’s focused on the retina, a thin film of nerve tissue lining the back of the eyeball. Neural retina - the retinal epithelium sensitive to light that develops from the inner layer of the optic cup.Sui Wang and Connie Cepko, Harvard Medical School. the innermost coat of the posterior part of the eyeball that receives the image produced by the lens, is continuous with the optic nerve, and consists of several layers, one of… … Universalium Ganglion cell layer nuclei of ganglion cells and some amacrine cells. Nerve fibre layer (NFL) axons of ganglion cells. This case involves synchronized action potentials in neocortical pyramidal… … Wikipedia The 10 layers of retina starting from the vitreous chamber are the following: Inner limiting membrane consists of the basement membrane and contains Mller cells. Neural correlates of consciousness - The Neuronal Correlates of Consciousness (NCC) constitute the smallest set of neural events and structures sufficient for a given conscious percept or explicit memory. In vertebrates, looking from outside, there are four major cell layers: (i) the outer neural retina, which contains neurons (ganglion cells, amacrine cells, bipolar cells) as well as blood vessels (ii) the… … Dictionary of molecular biology ![]() Retina - Light sensitive layer of the eye. Neural development in humans - Main article: Neural development The study of neural development draws on both neuroscience and developmental biology to describe the cellular and molecular mechanisms by which complex nervous systems emerge during embryonic development and… … Wikipedia Retina Right human eye cross sectional view. Retina - For the Retina display in the iPhone 4, see iPhone 4#Display. ![]() The study of neural development aims to describe the cellular basis of brain development and to… … Wikipedia Neural development - comprises the processes that generate, shape, and reshape the nervous system, from the earliest stages of embryogenesis to the final years of life. The incoming light passes through nerve fibres and intermediary nerve cells of the neural retina, before encountering the light sensitive rods and cones at the interface… … Dictionary of molecular biology Neural retina - Layer of nerve cells in the retina, embryologically part of the brain. There is a small area, called the macula, in the retina that contains special light sensitive cells … Medical dictionary Retina - The retina is the nerve layer that lines the back of the eye, senses light, and creates impulses that travel through the optic nerve to the brain. Layer - A sheet of one substance lying on another and distinguished from it by a difference in texture or color or by not being continuous with it.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |