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LOCALISATION OF FUNCTION IN THE BRAIN - Coggle Diagram
LOCALISATION OF FUNCTION IN THE BRAIN
localisation of function
the main part of the brain is divided into two symmetrical halves called left and right hemisphere
some of our physical and psychological functions are controlled or dominated by a particular hemisphere - called lateralisation
the theory that different areas of the brain are responsible for specific behaviours, processes or activities
left side of the body is controlled by the right hemisphere, right side of the body is controlled by the left hemisphere = contralateral
motor cortex
each lobe is separate from the rest and associated with different functions
in the back of the frontal lobe in both hemispheres is the motor cortex which controls voluntary movement in the opposite side of the body
the cerebral cortex is the outer layer of both hemispheres. the cortex is subdivided into four centres (lobes) - frontal lobe, parietal lobe, occipital lobe and temporal lobe
somatosensory area
this is where sensory information from the skin (eg touch, heat, pressure)
the amount of somatosensory area devoted to a particular body part denotes its sensitivity - receptors for our face and hands occupy over half of the somatosensory area
at front of both parietal lobes
visual area
each eye sends information from the right visual field to the left visual cortex and vice versa.
the visual cortex contains several different areas, with each of these areas processing different types of visual information, such as colour, shape and movement
occipital lobe at the back of the brain
auditory area
analyse speech based information and processes sound (acoustic) information
temporal lobes
language centres of the brain
wernike's area
in left temporal lobe as being responsible for language understanding
results in Wernicke's aphasia - often produce nonsense words
people who had no problem producing language but severe difficulties in understanding
Broca's area
speech production
damage to broca's area causes Broca's aphasia which is characterised by speech that is slow, laborious and lacking in fluency
left frontal lobe
people with broca's aphasia struggle with prepositions and conjunctions