7 nesvous system Cortical Sensory Regions Cerebral Cortex White numbers refer to

Question

7 nesvous system Cortical Sensory Regions Cerebral Cortex White numbers refer to lobes. 13. 12. 11.1 10 Sensory areas of the cerebral cortex receive and process information from sensory receptors (sound, sight, taste, touch, smell, the majority of which is initially routed through the thalamus (olfaction is the exception, as this bypasses the thalamus). The cortical region of the brain can be divided into three functionaly distinct areas: sensory, associative, and motor. The sensory areas include primary cortices for auditory, visual, olfaction, gustation, and somatosensory signals, which receive information from the thalamus. Information is also relayed between primary cortices and their corresponding association areas, aiding in their recognition 15. Each primary cortex can be mapped topographically illustrating the link between cortical organization and the respective sensing organs. Points on the retina that correspond to points on the primary visual cortex are shown on retinotopic map, the primary auditory cortex is shown on a tonotopic map. and the primary sensory cortex is shown on a somatotopic map. !a The somatotopic map is commonly visualized in the form of a somatosersory homunculus, in which the size/surface area of each different body part depicted on the map reflects the density of the sensory receptors that innervate that region, which is in turn a reflection of the sensitivity of the area.

Explanation / Answer

Ans.

1. Primary motor cortex

2. Primary Somatosensory cortex

3. Primary gustatory complex

4. Parietal lobe

5. Somatosensory association area

6. Visual sensory association area

7. Primary visual cortex

8. Occipital lobe

9. Primary olfactory cortex

10. Temporal lobe

11. Auditory association area

12. Primary auditory cortex

13. Frontal association area

14. Frontal lobe

15. Somatosensory homunculus

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