PSYC 1013 Lecture Notes - Lecture 3: Hermann Von Helmholtz, Subliminal Stimuli, Optic Nerve
Document Summary
Sensation the process of detecting external events by sense organs and turning those stimuli into neural signals. Perception involves attending to organizing, and interpreting stimuli that we sense. Recognizing sounds as a human voice and understanding that certain colours, shapes, and motion together make up the image of a human being walking toward you. Transduction when specialized receptors transform the physical energy of the outside world into neural impulses. Nerve impulses travel into the brain and influence the activity of different brain structures gives rise to our internal representations of the world. The idea that different senses are separated in the brain was first proposed in 1826 but the german physiologist johannes muller and is known as the doctrine of specific nerve energies. Orienting response describes how we quickly shift our attention to stimuli that signal a change in our sensory world. Sensory adaptation the reduction of activity in sensory receptors with repeated exposure to a stimulus.
