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8 Cards in this Set

  • Front
  • Back

four main brain lobes and functions

frontal - motor function, problem solving, judgment, impulse control

parietal - sensation and perception, integrating sensory input

temporal - auditory and memory

occipital - vision

how many neurones in the brain and how many connections?

85 billion ish, making between 100 and 10,000 connections with other neurones

how does information processing occur? (with regards to neurones)

the inside of a neurone is negatively charged compared to the outside (~70mV) due to the movement of charged ions across a cell membrane via specific ion channels

how is information transmitted within the cell?

transient alterations in the membrane potential

two main types of integration of a graded potential

temporal and spatial summation

voltage/action potentials advantages

voltage potentials are good for integrating information

action potentials are good for sending information over long distances; an action potential in an axon either happens or it doesn't, depending on whether a particular threshold is reached (decided in the axon hillock)

TTX tetrodotoxin

blocks ion flow through channels that generate action potentials. 10,000 times deadlier than cyanide

'pulses' in dendrites regarding size

'pulse' in dendrites can vary in size i.e it is a graded potential