Visual system The visual system in animals allows individuals to assimilate information from their surroundings. The act of seeing starts when the cornea and then the lens of the eye focuses light from its surroundings onto a light-sensitive membrane in the back of the eye, called the retina. The retina is actually part of the brain that is isolated to serve as a transducer for the conversion of light into neuronal signals. Based on feedback from the visual system, the lens of the eye adjusts its thickness to focus light on the photoreceptive cells of the retina, also known as the rods and cones, which detect the photons of light and respond by producing neural impulses.
Differentiate the processes of sensation and perception. Explain the basic principles of sensation and perception. Describe the function of each of our senses.
Outline the anatomy of the sense organs and their projections to the nervous system. Apply knowledge of sensation and perception to real world examples.
Explain the consequences of multimodal perception. After passing through a vibrantly colored, pleasantly scented, temperate rainforest, I arrived at a cliff overlooking the Pacific Ocean.
I grabbed the cold metal railing near the edge and looked out at the sea. Below me, I could see a pod of sea lions swimming in the deep blue water.
All around me I could smell the salt from the sea and the scent of wet, fallen leaves. Our senses combine to create our perceptions of the world. It is probably best to start with one very important distinction that can often be confusing: The physical process during which our sensory organs—those involved with hearing and taste, for example—respond to external stimuli is called sensation.
Sensation happens when you eat noodles or feel the wind on your face or hear a car horn honking in the distance. During sensation, our sense organs are engaging in transductionthe conversion of one form of energy into another.
Physical energy such as light or a sound wave is converted into a form of energy the brain can understand: After our brain receives the electrical signals, we make sense of all this stimulation and begin to appreciate the complex world around us.
This psychological process—making sense of the stimuli—is called perception. It is during this process that you are able to identify a gas leak in your home or a song that reminds you of a specific afternoon spent with friends.
Regardless of whether we are talking about sight or taste or any of the individual senses, there are a number of basic principles that influence the way our sense organs work. The first of these influences is our ability to detect an external stimulus.
Each sense organ—our eyes or tongue, for instance—requires a minimal amount of stimulation in order to detect a stimulus. The way we measure absolute thresholds is by using a method called signal detection.Sensation refers to the process of sensing our environment through touch, taste, sight, sound, and smell.
This information is sent to our brains in raw form where perception comes into play. Perception is the way we interpret these sensations and therefore make sense of everything around us. Sensation and Perception By Adam John Privitera. Chemeketa Community College. The topics of sensation and perception are among the oldest and most important in all of psychology.
an optical illusion used to study human's visual perception. It illustrates sensation and perception by being a bistable figure. What is the thalamus and what role does it play in sensation and perception? Sensation refers to the process of sensing our environment through touch, taste, sight, sound, and smell.
This information is sent to our brains in raw form where perception comes into play.
Perception is the way we interpret these sensations and therefore make sense of everything around us. In sensation, the transforming of stimulus energies, such as sights, sounds, and smells, into neural impulses our brains can interpret sensation stimulation of sense organs.
About This Quiz & Worksheet. Assess your comprehension of the visual perception theory with these study resources. Included are quiz questions to test you on the theory and the facets that make it up.