The nervous system and neurons

• 1. Frontal lobe - personality / communication
  2. temporal lobe - emotions
  3. parietal lobe - sense + perception
  4. occipital lobe - vision processing
• CNS -

  brain - centre of conscious awareness , vital automatic functions

  spine - info travels to send to brain ( reflex action)
• PNS -

  autonomic nervous system- vital automatic functions eg - breathing

  somatic nervous system- controls muscle movement and receives info from sensory receptors
• Sensory - large dendrite short axon

  relay - short dendrite short axon

  motor - short dendrite large axon
• Neuron

  dendrites - receive messages from other neurons triggering action potential

  cell body - contains cell’s nucleus

  myelin sheath - insulating layer , speed up rate of message transmissions

  Schwann’s cells - form myelin sheath

  node of ranvier - increase speed of impulse

  
• Neurone not stimulated = polarised = negative charge

  stimulated caused neurone to depolarise = if it reaches threshold = action potential