PSYC 100 Chapter 5: Chapter 5.doc

• School: McGill University
• Department: Psychology
• Course: PSYC 100
• Professor: James Mac Dougall

Document Summary

Pressure-sensitive hair cells in cochlea of inner ear. Light-sensitive rods and optic nerve connection neurons touch, taste. Molecules dissolved in fluid on mucous membranes in the nose. Taste cells in taste buds on the tongue. Sensitive ends of olfactory neurons in the mucous membranes. Trigeminal nerve for touch above the neck, spinal nerves for touch elsewhere. What are the basic sensory processes: neurons in sensory organs respond directly to events in the world, neurons in brain do not respond to events in the world respond to inputs from other neurons. In smell, the nasal cavity gathers odorants human smell inferior to other animals: i. e. dogs have 40 times more olfactory receptors than humans 100,000 to. Alzheimer"s disease (rapid decline in cognition: study older adults average age of 80 (well enough to be living on their own) given smell identification test. Adults followed for five years after testing.