PS102 Lecture Notes - Lecture 4: Optic Chiasm, False Alarm, Retina
Document Summary
Sensation: process through which the senses detect visual, auditory and other sensory stimuli and transmit them to the brain. Perception: process by which sensory information is actively organized and interpreted by the brain. Bottom-up processing: perception that proceeds by transducing environmental stimuli into neural impulses that move successively into more complex brain regions. Top-down processing: perception processes led by cognitive processes, such as memory or expectations. Sensory receptor cells: specialized cells that convert a specific form of environmental stimuli into neural impulses, sensory transduction: the process of converting a specific form of sensory data into a neural impulse that our brain can read. Just noticeable difference: weber fraction, amount of increase needed to make a difference. If you are carrying 2kg, 1 additional gram will not make a difference. If you only carry 20 grams, 1 gram will make a difference.
