How reading changes the way your brain works - BBC World Service

Key Concepts

• Reading as an Acquired Skill: Reading is not an innate biological function but a learned skill that co-opts existing brain networks.
• Brain Plasticity and Reading: The brain adapts and rewires itself to accommodate reading, altering structure, activity, and connectivity.
• Logographic vs. Alphabetic Writing Systems: Different writing systems engage distinct brain regions, with logographic systems (like Chinese) relying more on visual memory and association.
• Impact of Digital Reading: Passive scrolling and frequent interruptions in digital reading can lead to skimming, increased susceptibility to misinformation, and potential negative impacts on attention and academic performance in children.
• Deep Reading: Immersive and critical engagement with text is crucial for cognitive development, societal progress, and personal transformation.

The Neurobiology of Reading

Reading is not a natural, innate human ability. Instead, it activates brain circuits that have evolved over thousands of years for other purposes, such as vision, auditory processing, language, attention, and affect. The neurotypical brain is born with the capacity for sight and sound production but not for reading. From an evolutionary perspective, the brain has not had sufficient time to develop a dedicated reading network. Therefore, to build a reading brain, we repurpose existing neural pathways.

Evolution of Writing Systems

The development of writing systems is a testament to this evolutionary adaptation. Early examples include Sumerian cuneiform symbols, dating back to approximately 3300 BC, and Egyptian hieroglyphics, which emerged around the same period. As humans engaged more with reading and writing, these symbols evolved into the letters and characters we recognize today. Scientific studies confirm that reading establishes associations between letters, words, sounds, and meanings, making it a comprehensive, whole-brain process that involves all four lobes of the cerebral cortex. The act of learning to read fundamentally alters brain activity, structure, and connectivity.

Language Structure and Brain Activation

The specific language being read also influences brain activation. For instance, Chinese characters represent a logographic writing system, where each symbol signifies an object or idea, unlike alphabet-based languages like English. Research indicates that learning logographic systems engages different brain areas, particularly those involved in visual memory and visual association, more intensely than learning alphabetic languages.

Case Study: Bilingual Patient This theory was supported by a study of a bilingual patient proficient in both Chinese and English. After a severe stroke, the patient lost the ability to read Chinese, while their English reading proficiency remained unaffected. This case highlights how the brain's circuitry reflects the distinct demands of each writing system, with Chinese requiring greater visual memory and processing of its intricate symbols.

Physical and Emotional Impact of Reading

Reading has profound effects not only on the brain but also on the physical body. The transcript notes that individuals can literally "feel in their guts" the emotions associated with reading, such as nervousness or pain. This is linked to the anterior insula, a brain region responsible for gastromotoric movements, feelings of nausea, pain, and discomfort, which is also involved in empathic processes.

The Impact of Digital Technologies on Reading

The brain is highly adaptable, and evidence suggests it is already changing in response to new technologies. Reading on digital devices like phones and tablets often involves passive scrolling, frequently interrupted by notifications. This mode of reading encourages skimming, making individuals more susceptible to misinformation. The transcript emphasizes the critical need to equip individuals with the ability to think critically about the information they consume, as this is fundamental to a functioning democracy.

Research Findings on Digital Exposure in Children: Academic research suggests a negative correlation between early and extensive cell phone use in children and their later academic performance. Studies at eight years of age have shown that the amount of digital exposure predicts poorer attentional executive function, processing speed, and academic outcomes. A brain constantly exposed to distractions and hyper-stimulation may struggle to transition between stimuli without a craving for ever-shorter intervals, leading to boredom when offline.

Navigating the Digital World and Promoting Deep Reading

While the research on digital screen time is ongoing, some studies indicate that monitored and education-focused screen time can be beneficial. For parents concerned about their children's digital engagement, the advice is to return to fundamental practices. The most effective antidote is to immerse children in reading and foster a "reading life." Parents and educators play a crucial role by modeling reading behavior, reading aloud to children, and demonstrating a genuine love for reading.

Conclusion: The Transformative Power of Deep Reading

The power of deep reading is presented as fundamental to our humanity. By engaging in deep reading, individuals transform their brains and their very selves. This individual transformation, in turn, has the potential to reshape society, enabling the creation of "bigger, more beautiful futures."