Be sure to consider both sides of the issue and provide evidence to support your arguments. Brain damage can produce a severe loss of function such as aphasia or agnosia. In such cases, it is important to determine whether the function is truly lost or whether it is at least partially retained but cannot be properly expressed or demonstrated. Put another way, it is important to distinguish between loss of knowledge or ability and failure of access to that knowledge or ability. Please support or justify your answer.
Hemispheric asymmetry exists at both a functional and structural level.
Be sure, where possible, to specify the cortical regions that are implicated in each of the functions and whether structural asymmetries between the regions have been noted.