The decline in the number of people who read for fun is a concerning trend that has been steadily increasing. According to research by The Reading Agency, fifty percent of UK adults do not read regularly, a significant increase from 42% in 2015. Additionally, almost one in four young people aged 16-24 have never been readers.
But what are the implications of this decline in reading? How does the preference for video over text impact our brains and our evolution as a species? A new study published in Neuroimage sheds light on these questions by analyzing data from over 1,000 participants to uncover the distinct brain anatomy traits of readers of varying abilities.
The study found that individuals who were good at reading had different brain structures in two key regions in the left hemisphere, crucial for language processing. One of these regions is the anterior part of the temporal lobe, which helps associate and categorize meaningful information. The other region is Heschl’s gyrus, which is involved in auditory processing and phonological awareness, a precursor to reading development.
Interestingly, the research showed that individuals with better reading abilities had a larger anterior part of the temporal lobe in the left hemisphere compared to the right. This suggests that having a larger brain area dedicated to processing meaning makes it easier to understand words and read effectively.
Furthermore, the study highlighted the role of myelin, a fatty substance that insulates nerve fibers and enhances neural communication speed. The left hemisphere of most individuals has more myelin in the auditory cortex, which is essential for language processing. This increased myelination in the left hemisphere enables fast and categorical processing necessary for language comprehension.
While a thicker cortex is beneficial for complex abilities that require integrating information, such as phonology, the brain is malleable and can change with learning. For instance, intensive language study can increase cortical thickness in language areas. Reading, therefore, can shape the structure of brain regions involved in reading skills, such as the left Heschl’s gyrus and temporal pole.
In conclusion, reading is not just a personal hobby but a crucial skill that benefits humanity as a whole. As our society continues to prioritize other forms of media over reading, we risk diminishing our capacity to interpret the world and understand others. So, if you want to keep your brain healthy and thriving, pick up a good book and start reading today.
This article was written by Mikael Roll, a Professor of Phonetics at Lund University, and is republished from The Conversation under a Creative Commons license. You can read the original article here.
