A Simple Approach to Neuroscience by Satani Abhijeet

Author:Satani, Abhijeet [Satani, Abhijeet]
Language: eng
Format: epub
Publisher: PAPER TOWNS
Published: 2020-08-13T16:00:00+00:00

The temporal lobe is responsible for verbal memory and is situated in the lower brain, beside the ears.

The occipital lobe is important for visual perception, which is useful for identifying letters in a word or sentence. It is located at the back of the head.

The parietal lobe regulates sensory perceptions and is located in the far back. Its job is to link spoken and written language with memory to help us apprehend sound and letters.

The part of the brain that handles word analysis is the parietotemporal system. It decodes words consciously and maps letters and words with their sound counterparts. This area, Area A in figure 2, understands both written and spoken articulation. The second important part is the occipitotemporal area which is shown in Part B figure 2. This area handles reading, specifically quick access to full words and helps in expert coherent reading.

Structural brain differences -

The difference between people with and without coherent reading disabilities has been studied by mapping the structural differences in the brains of people of all ages. Two types of materials make the brain; grey matter in the brain is visible at first glance. Grey matter is mainly made of nerve cells, and its chief function is processing information.

Information is carried out within the brain through White matter. It is present in the deeper regions of the brain and is allotted the job of information transfer along the brain. It is composed of connective fibres covered in myelin.

If there is less grey matter in the left parietotemporal region, then the processing of language based on sound is difficult, and if there is less white matter in this region, then reading ability is hampered. As noted by Booth and Burman (2001), dyslexic people have less grey matter as well as white matter as compared to non-dyslexic people. White matter is also attributed to the communication between various regions of the brain. Another notable difference is the size of the brain. Normally -non-dyslexic right-handed people have slightly larger left hemisphere than the right. This hemispherical asymmetry is different in both people with dyslexia and people without it as done by structural analysis.

People suffering from dyslexia actually have either symmetry or asymmetry in a different direction. As in either their left and right hemispheres are same in size, or their right is larger than the left. This was found by Heim and Keil (2004). Although why this happens is still being researched, this is possibly the reason for the problems of reading and understanding words for dyslexic people.

Download

Copyright Disclaimer:
This site does not store any files on its server. We only index and link to content provided by other sites. Please contact the content providers to delete copyright contents if any and email us, we'll remove relevant links or contents immediately.