01:830:313 Chapter Notes - Chapter Ch. 6 : Ganglion Cell, Calcarine Sulcus, Electromagnetic Radiation
12 Jul 2016
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Document Summary
Anatomy of the visual system: the eyes, photoreceptors, connections between eye and brain, section summary. Analysis of visual information: role of the visual association cortex: two streams of visual analysis, section summary, introduction. We receive information about the environment from sensory receptors- specialized neurons that detect a variety of physical events. Do not confuse sensory receptors with receptors for neurotransmitters, neuromodulators, and hormones. Sensory receptors are specialized neurons, and the other types of receptors are specialized proteins that bind with certain molecules. Stimuli impinge on the receptors and, through various processes, alter their membrane potentials. This process is known as sensory transduction because sensory events are transduced ( transferred ) into changes in the cells" membrane potential. Most receptors lack axons; a portion of their somatic membrane forms synapses with the dendrites of other neurons. Receptor potentials affect the release of neurotransmitters and hence modify the pattern of firing in neurons with which these cells form synapses.
