localisation of function in brain

• diff areas of brain are responsible for specific behaviours, processes or activities.
• hemispheres 


  -contralateral- right hemisphere controls persons left side vice versa

  -hemispheres connected by corpus collosum

  -outside layer of hemispheres is called cortex which is subdivided into lobes
• lobes and functions


  frontal- higher level thinking, speech, motor control

  parietal-receive and interpret sensory info

  occipital- receive and process visual info

  temporal- process auditory info and important in memory
• somatosensory area


  -at front of parietal lobes

  -where sensory info from skin is represented

  -processes touch,pain,heat and pressure
• occipital lobe


  -back of brain

  -visual cortex

  -contains diff parts that process diff type of info including colour, shape or movement

  -the eyes send info from right visual field to left visual cortex vice versa

  -damage to the left hemisphere can result in blindness in the right visual field of each eye
• motor area


  -controls voluntary movement in opposite sides of body
• language centres


  -left hemisphere

  -brocas area - speech production - if damaged (brocas aphasia), speech is slow and lacks fluency, able to read and have fine comprehension but limited writing ability

  -wernickes area - language comprehension - if damaged, (wernickes aphasia), produce nonsense words when speaking, severe difficulties understanding speech
• study


  phineas gage