Lesson 6 hemispheric specialisation

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Lesson 6 hemispheric specialisation

  1. 1. Lesson 6: Hemispheric SpecialisationWednesday, 25 January 2012
  2. 2. From Last Lesson..... Question 1 When a basketballer shoots for a goal, which part of the brain sends the message instructing her to raise her shooting arm? A. the somatosensory cortex B. the prefrontal lobe C. the occipital lobe D. the motor cortex Question 2 a. The deeply furrowed or grooved layer of tissue that covers the cerebral hemispheres is known as the ______________(1 mark) b. List two main functions of this grooved layer of tissue. (2 marks)Wednesday, 25 January 2012
  3. 3. Question 1 When a basketballer shoots for a goal, which part of the brain sends the message instructing her to raise her shooting arm? A. the somatosensory cortex B. the prefrontal lobe C. the occipital lobe D. the motor cortexWednesday, 25 January 2012
  4. 4. Question 2 a. The deeply furrowed or grooved layer of tissue that covers the cerebral hemispheres is known as the Cerebral cortex (1 mark) b. List two main functions of this grooved layer of tissue. (2 marks) Functions include: • primary sensory functions/processing of sensory information • motor coordination and control/processing of motor information • ʻhigher mental processesʼ of language, thinking and problem solving • facilitating most of the integrative, coordinated behaviours • information processing within lobes, including perception, cognition and memory • integration of information among lobes in association areas • personality. Examiner comments: This question was not well answered. Because of the wording of the question, one mark was awarded for a statement explaining the purpose of the grooving, such as ʻthe function of the furrowing and grooving is to increase the surface area (or volume) – thereby increasing blood flow/oxygen or energy supply/number of neuronsʼ.Wednesday, 25 January 2012
  5. 5. This lesson.... • Define the term Hemispheric specialisation • Explain the cognitive and behavioural functions of the right and left hemispheres of the cerebral cortex, non-verbal versus verbal and analytical functionsWednesday, 25 January 2012
  6. 6. Hemispheric Specialisation The idea that one hemisphere has specialised functions, or that it exerts greater control over a particular function. It is also known as hemispheric dominance and hemispheric lateralisation. In reality both the left and right hemispheres are involved in nearly all functions.Wednesday, 25 January 2012
  7. 7. Wednesday, 25 January 2012
  8. 8. The Left Hemisphere The left hemisphere specialises in verbal and analytical functions. Verbal functions involve the use or recognition of words eg. reading, writing, speaking and understanding speech. Analytical functions involve breaking down a task into its key parts and approaching it in a sequential , ‘step by step’ way, as is required when using logical reasoning to interpret and apply a formula to solve a maths problem. •Wednesday, 25 January 2012
  9. 9. The right Hemisphere The right hemisphere specialises in non- verbal functions that are not dependent on language skills eg. Spatial and visual thinking such as completing a jigsaw puzzle, reading a map, recognising faces and tunes; appreciating music and artworks; creativity; and fantasy eg daydreaming.Wednesday, 25 January 2012
  10. 10. SummaryWednesday, 25 January 2012
  11. 11. ACTIVITY Identify the cerebral hemisphere (left or right) that specialises in the following cognitive and behavioural functions 1.Appreciating the beauty of a forest 2.Judging whether a car will fit into a parking bay. 3.Listening to someone speak 4. Kicking a football with your left footWednesday, 25 January 2012
  12. 12. Research on hemispheric specialisation There are three main approaches to conducting research on hemispheric specialisation. •Studying people with brain damage •Studying people after a split brain operation (see next lesson) •Studying people with intact brainsWednesday, 25 January 2012
  13. 13. Wednesday, 25 January 2012

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