University:
MacEwan University
Course:
PSYC 258 | Cognitive Psychology
Academic year:

2024
Views:

255

Pages:

2
Author:

Arthur M.

TACTICE SENSITIVITY & ACUITY • Absolute Detection Threshold → what's the smallest pressure that we need to apply m order for receptor to fire / for us to detect? • Two- pont discrimination I now far apart two ponts of pressure need to be for us to perceive them as 2 pomts of pressure? • Grating Acuity → what is the minimal amplitude of grooves that can be discriminated between a smoothed and a grooved surface? Tactile senuitivity is nighest m fingers a face. Parts of body that nave better discrimmation threshold have better absolute sensitivity. Tactile sensitivity tend to decrease with age. to Tactle sensation are received m primary somato sensory area in the brain. Adjacent to primary motor cortex & they work together. certam parts of tue body have a larger cortical area as tney are more sensitive (finger, face) HOMUNCUCUS: this dude distorted representation of the sensory map of the numan body if each of our parts grew in proportion to now much we sense with tnem. CORTICAL Phantom limb sensations: PLASTICITY 80% of amputees have some imb sensations. They actually reel the amputated limo is stalthere. These sensations come from the somatosensory cortex m me brain. ENCODING TEMP VIA thermoreceptors • 2 populations: warmth & cold fibers • thermoreceptors respond when we make contact with objects warmer or cooler than our skin cold + warm = not! very not temperatures is encoded by cold fibers. cold receptors either respond to super low or super high temperatures. natural plant compounds can activate thermo- receptors.