Localisation of function in the brain

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Localisation vs holistic theory: The accepted holistic theory stated that all parts of the brain were involved in thought and action processing. Whereas, Broca and Wernicke put forward localisation of brain which meant that certain areas of the brain were involved in certain tasks and areas of the body. If a part of the brain is damaged then the task linked will be affected.

Hemispheres: There is the right and left hemisphere. When one hemisphere dominates a function this is lateralisation. The left hemisphere causes activity on the right side of the body and vice versa. The cerebral cortex (3mm thick) is the outer layer of the brain. 

Lobes and functions: The hemispheres are divided into four lobes - the parietal lobe, the temporal lobe, the frontal lobe and the occipital lobe. Motor area (involved in regulating movement) - back of frontal lobes. Damage can cause loss of control over fine movements. Somatosensory area (processes sensory info) - back of parietal lobes.…