PSYA01H3 Lecture : Chapter 5-Sensation
Document Summary
How the sense system function depends on specific modalty of the info and on the characteristics of teh information and the state of the brain at the time it recieves it. Visual sense is rapidly changing yet appears stable. Sound however is not so variably, changes are more gradual. Sound carry around obstales, vision does not. Psych define sensation---> detection of simply properties of stimuli, such as brightness percetpion-->detection of objects, there location, movement and background. The task of the sense organ is transmit signals to the brain that are coded in such a ways was to rep faithfully the events that have occured. This is the process where sense organs convert energy from the enviro into neural activity. Receptor cells; release chem transmitter subs that stimulate other neurons. Dendrites respond dircelty ti tge physical stimuli without intervention of specialized receptor cells. Action potentials cannot be altered and are fixed in size and duration.
