How to Know if I Have Dyslexia? The Neuroscience of the Reading Brain

Reading is not natural. While humans have been speaking for 100,000 years, we have only been reading for about 5,000. There is no “reading gene.” To read, the brain must recycle ancient circuits evolved for object recognition and speech.
Dyslexia occurs when this recycling process happens differently.

It is estimated that 1 in 5 people (20%) have some degree of dyslexia, yet many remain undiagnosed, masking their struggles with high intelligence and hard work. At Taproot Therapy Collective, we often see adults who come in for anxiety or depression, only to discover that the root cause is the shame of an undiagnosed learning difference.

Part I: The Neurobiology (Why is Reading Hard?)

To understand dyslexia, you must understand the “Reading Circuit.” According to Dr. Sally Shaywitz at Yale, fluent reading involves three key areas of the left hemisphere:

1. Broca’s Area (Front): Responsible for articulation and vocalization (sub-vocalizing words).
2. Parieto-Temporal Region (Middle): Responsible for “Word Analysis”—breaking a word into syllables and sounds.
3. Occipito-Temporal Region (Back): The “Visual Word Form Area.” This is the express highway. It recognizes whole words instantly as images (e.g., seeing “cat” and knowing it instantly without sounding it out).

The Dyslexic Difference: Neuroimaging (fMRI) shows that dyslexic readers have an underactive back brain (the express highway) and an overactive front brain.
They are forced to manually decode every word, every time, using the slow, analytical frontal lobe. This explains why reading is physically exhausting for dyslexics—their brain is working 5x harder to achieve the same result.

Part II: Signs and Symptoms (It’s Not Just Reversing Letters)

The myth that dyslexia is simply “seeing letters backwards” is false. The core deficit is Phonological Awareness—the ability to hear that the word “Cat” is made of three sounds (C-A-T).

Common Signs in Adults and Teens:

• Slow Reading Rate: You may read accurately, but it takes you much longer than peers.
• Poor Spelling: Reliance on spell-check; difficulty spelling the same word consistently.
• Dysnomia (Word Retrieval): The “tip of the tongue” phenomenon. You know the word, but you can’t pull it out quickly.
• Foreign Language Struggles: Extreme difficulty learning a second language.
• Exhaustion: Reading a menu or an email feels like heavy lifting.

Part III: The “Sea of Strengths” Model

Dyslexia is not a disease; it is a trade-off. The Eide brothers (authors of The Dyslexic Advantage) argue that the dyslexic brain is wired for Interconnected Reasoning rather than procedural efficiency.

The Four MIND Strengths:

1. Material Reasoning: Exceptional spatial awareness. Dyslexics are overrepresented in architecture, engineering, and surgery.
2. Interconnected Reasoning: The ability to see connections between unrelated concepts. This leads to high creativity and “out of the box” thinking.
3. Narrative Reasoning: Strong episodic memory. Many dyslexics are powerful storytellers (e.g., Steven Spielberg, Agatha Christie).
4. Dynamic Reasoning: The ability to predict outcomes in complex, changing systems (e.g., entrepreneurs, stock traders).

Part IV: The Emotional Toll (The Shame Spiral)

The most dangerous aspect of dyslexia is not illiteracy; it is shame.
Children who struggle to read often internalize the message that they are “stupid” or “lazy.” This leads to Learned Helplessness and school avoidance.

Clinical Implications:
Many adults with undiagnosed dyslexia develop specialized Personality Defenses to hide their struggle. They may become the “class clown,” the “rebel,” or the “perfectionist.” Therapy often involves Internal Family Systems (IFS) work to heal the “young exile” who felt humiliated in the classroom.

Part V: Interventions and Accommodations

Can you “cure” dyslexia? No, because it is a structural difference. However, you can retrain the brain to read more efficiently.

1. Structured Literacy (Orton-Gillingham)

Standard “whole language” reading instruction fails dyslexics. They require Multisensory Structured Language Education (MSLE). This involves explicit, systematic teaching of phonics, using touch, sight, and sound simultaneously to build new neural pathways.

2. Assistive Technology

In the modern world, “eye-reading” is optional.
* Text-to-Speech (Audiobooks): Allows dyslexics to access high-level content without the bottleneck of decoding.
* Speech-to-Text: Allows them to write at the speed of their thought, not their spelling.

Conclusion: Reframing the Difference

If you suspect you have dyslexia, know this: Your brain is not broken; it is specialized. You are built for big-picture thinking in a world obsessed with small-print details. Diagnosis is the first step toward moving from shame to empowerment.

Explore Therapies for Neurodivergence

Taproot Therapy Collective Podcast

Support for Learning & Anxiety

Neurofeedback: Improving Focus & Processing

IFS: Healing Academic Trauma

Anxiety Therapy for Neurodivergent Adults

Brain Science

QEEG Brain Mapping

Neuroplasticity: Can I Change My Brain?

Bibliography

• Shaywitz, S. (2003). Overcoming Dyslexia: A New and Complete Science-Based Program for Reading Problems at Any Level. Knopf.
• Wolf, M. (2007). Proust and the Squid: The Story and Science of the Reading Brain. Harper.
• Eide, B. L., & Eide, F. F. (2011). The Dyslexic Advantage: Unlocking the Hidden Potential of the Dyslexic Brain. Hudson Street Press.
• Norton, E. S., & Wolf, M. (2012). Rapid Automatized Naming (RAN) and Reading Fluency: Implications for Understanding and Treatment of Reading Disabilities. Annual Review of Psychology.