PS101 Lecture 4: PS101-Lecture 4-Biological Bases of Behaviour
Document Summary
# of neurons in the average human brain = 80-100bn. Timescale for a bit = <10 secs. Simple apple per recall of about 1 min: >10tb. Info processing capacity = 65-70 pflop for t2--world"s super-fastest computer. Differ in shape and size and function. Specialized cells that carry messages throughout the nervous system. Afferent neurons (sensor): spinal cord muscles, enabling the body to move. Interneurons: carry info b/w neurons in the cns relay information from the senses to the brain and send information from the cns to the glands and. Like the glue that holds neurons together. Waste system; removes waste such as dead neurons. Stimulated; na^+ ions enter open channel into the membrane, shifting in electrical charge. There are a lot of synapses on many neurons. Synaptic cleft: neurons don"t meet (gap between neurons) Agonists excite, increasing likelihood of neuron firing. Antagonists oppose, decreasing likelihood of neuron firing (curare) located between motor neurons and voluntary muscles.
