lateralisation

• P: there are a number of disadvantages associated with hemispheric lateralisation

  E: architects and the mathematically gifted tend to have superior right hemispheric skills but are also much more likely to be left handed and suffer higher rates if allergies and problems with the immune system. Tonnessen found a relationship between handedness and immune system disorders, suggesting the same genetic processes that lead to lateralisation affect the development of the immune system
• link for immune system

  L: morfit and weekes lent support to this, finding left handers had a higher incidence of immune system disorders in their families than did right handers
• P: lateralisation of function appears not to stay exactly the same throughout an individual's lifetime, but changes with normal ageing

  E: lateralised patterns found in younger individuals tend to switch to bilateral patterns in healthy older adults. szaflarski found that language became more lateralised to the left hemisphere with increasing age in children and adolescents, but after age 25, lateralisation decreased with each decade of life
• link for age

  L: its difficult to know why this is the case, one possibility is that using extra processing resources of the other hemisphere may in some way compensate for age-related declines in function.