PSYC1020 Lecture Notes - Lecture 5: Thalamus, Hashish, Morphine
Document Summary
Sensation: how a physical stimulus first registers on your sensory system: perception: how your rain processes the sensory information, principles of perception o signal detection theory o visual illusions, neuropsychology and neuroscience. Signal detection theory: better sig(cid:374)al (cid:271)(cid:455) ide(cid:374)tif(cid:455)i(cid:374)g (cid:862)(cid:374)oise(cid:863, visual illusions o illustrate shortcuts the brain takes trying to figure out the world o bistable percept: 2 possible interpretations of an image: neuropsychology and neurophysiology o studying the brain gives us info about how perception works. Lens focuses to give the retina an upside-down back-to-front image. Turns photons into neural signals: pupil adjusts amount of light, retina. Tympanic membrane: converts sound waves into vibrations through the cochlea than high frequencies) Inferior colliculus, relayed through the thalamus to the auditory cortex: brainstem feeds to inferior colliculus for the startle reflex and sound localisation, auditory nerve feeds to brainstem: fuses binaural info from each ear. Interplay between what is expected and what (cid:455)ou do(cid:374)(cid:859)t = feels.
