The fusiform gyrus is known as the 'area of expertise', (responsible for face recognition) damage to this can lead to prosopagnosia = face blindness. This suggests that there is some localisation of function.
Explain holism vs reductionism
Taking a holistic approach to the functions of the brain may be more appropriate, as it is too simple to claim that certain areas of the brain are responsible for certain things due to the brain's complexity and plasticity