Localisation of Function
- Created by: Thunder1107
- Created on: 06-09-17 17:38
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- Localisation of function
- Visual Centres
- It begins in the retina where light enters and strikes the photo-receptors. The impulses are transmitter via the optic nerve to the brain
- It is located in the visual cortex in the occipital lobe
- The majority of nerve impulses termite at the thalamus which acts as a relay station
- The visual cortex spans both hemispheres where the right receives info from the left eye and vice versa
- Wernicke's Area
- Wernicke's area is responsible for processing speech
- It is in the posterior portion of the left temporal lobe
- Patient's with a lesion in Wernicke's area could speak but could not understand language
- The Somatosensory Cortex
- It is located in the parietal lobe along the precentral gyrus
- It detects sensory events from different parts of the body
- Using info from the skin this cortex produces sensations of touch, pain and temp which it localises to body regions
- The Motor Cortex
- It is located in the frontal lobe along the precentral gyrus
- Both hemispheres have a motor cortex on one side of the brain controls the other side of the body
- It is responsible for the generation of voluntary movements
- Auditory Centres
- The process begins in the cochlea where sound waves are converted to nerve impulses which travel via the auditory nerve
- The last stop is the auditory cortex where it is recognised and a response happans
- The first stop is the brain stem where basic decoding happens, the next stop is the thalamus which further processes
- Most of the areas lies within the temporal lobes on both sides
- Broca's Area
- It was discovered by Paul Broca who studied patient "tan" who could understand language but could not speak or write
- It is located in the posterior portion of the frontal left lobe
- This area is critical for speech production
- Visual Centres
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