What Is The Cause Of Dyslexia?

Dyslexia is a neurological condition that affects a person’s ability to read, write, and spell, despite having average or above-average intelligence. It is the most common learning disability, affecting approximately 10% of the global population.

Dyslexia can vary in severity and manifests differently from person to person. While it is most often diagnosed in children, its effects can persist into adulthood, influencing various aspects of daily life and learning. 

Understanding dyslexia, its causes, symptoms, and ways to support those who have it is crucial for educators, parents, and society at large. In this article, we will explore the primary causes of dyslexia, the common symptoms associated with it, and effective strategies to support individuals with dyslexia.

What Is The Cause Of Dyslexia?

Dyslexia is primarily believed to be a neurobiological condition, meaning that it originates in the brain and is linked to how the brain processes language. Research suggests that dyslexia results from differences in the way the brain’s left hemisphere functions. The left hemisphere is responsible for language processing, including reading and writing.

In individuals with dyslexia, certain areas of the brain involved in language processing show less activation and different patterns of connectivity than in individuals without dyslexia.

Several factors contribute to the development of dyslexia:

• Genetic Factors: Dyslexia tends to run in families, indicating a strong genetic component. Studies have identified specific genes associated with dyslexia that are involved in brain development and language processing. If a child has a parent or sibling with dyslexia, their chances of having dyslexia are significantly higher. Genetic research has shown that multiple genes are involved, and they interact in complex ways to influence the development of dyslexia.

• Brain Structure and Function: Neuroimaging studies have revealed that people with dyslexia often have subtle differences in the brain’s structure and function. For example, there may be variations in the size and shape of areas of the brain associated with reading and language. Functional MRI studies have shown that individuals with dyslexia have less activation in the brain areas involved in phonological processing, which is the ability to understand and manipulate the sounds of language. These differences suggest that dyslexia is linked to how the brain is wired and how it processes information.

• Environmental Influences: While genetic and neurobiological factors play a significant role in dyslexia, environmental factors can also influence its development. Early exposure to language, the quality of education, and socioeconomic status can impact a child’s reading development. Children who are not exposed to a rich language environment or who have limited access to quality education may be more at risk for developing reading difficulties, including dyslexia. Additionally, prenatal factors, such as maternal health and exposure to toxins, can also affect brain development and potentially contribute to dyslexia.

Common Symptoms And Signs Of Dyslexia

Dyslexia manifests differently in individuals, and its symptoms can vary depending on age, the severity of the condition, and other factors. However, there are some common symptoms and signs that may indicate a person has dyslexia:

• Difficulty with Phonological Processing: One of the hallmark signs of dyslexia is difficulty with phonological processing, which is the ability to recognise and manipulate sounds in spoken language. This difficulty can make it challenging for individuals to learn how to read, as they may struggle to connect letters with their corresponding sounds. For example, a child with dyslexia may have trouble distinguishing between similar sounds, such as “b” and “d,” or blending sounds to form words.

• Reading and Spelling Challenges: People with dyslexia often experience slow and laborious reading, frequently making errors, mispronouncing words, or skipping over words or lines. They may also struggle with spelling, as they find it difficult to remember the correct order of letters in words. These challenges can affect their ability to comprehend written material and make learning more challenging.

• Writing Difficulties: Dyslexia can also affect writing skills, making it difficult for individuals to organize their thoughts and express them clearly in writing. They may have trouble with grammar, punctuation, and sentence structure, leading to written work that appears disorganized and contains numerous errors.

• Memory and Attention Issues: Some individuals with dyslexia may have difficulties with working memory and attention. This can make it hard for them to follow multi-step instructions, retain information, or focus on tasks for extended periods. While these issues are not exclusive to dyslexia, they can compound the challenges associated with reading and writing.

• Late Talking and Delayed Language Development: In some cases, children with dyslexia may be late talkers or have delayed language development. They may have difficulty learning new words, recalling words, or forming sentences. This can affect their ability to communicate effectively and may be an early sign of dyslexia.

Effective Strategies For Supporting Individuals With Dyslexia

Understanding the causes and symptoms of dyslexia is only the first step in supporting those who have it. Several effective strategies and interventions can help individuals with dyslexia succeed academically and personally:

• Multisensory Learning Approaches: Multisensory learning approaches engage multiple senses—such as sight, sound, touch, and movement—to help reinforce learning and make it more accessible. For example, students might use letter tiles to spell out words while saying the sounds out loud, or trace letters with their fingers while listening to the corresponding sounds. These techniques can help individuals with dyslexia build stronger connections between sounds, letters, and words, making reading and writing easier.

• Explicit and Systematic Phonics Instruction: Phonics instruction is crucial for individuals with dyslexia, as it focuses on teaching the relationship between letters and sounds. This instruction should be explicit (directly taught) and systematic (structured and sequential) to help students develop the skills they need to decode words and improve their reading fluency. Evidence-based reading programs designed specifically for dyslexia can provide the structured support needed for effective phonics instruction.

• Accommodations and Assistive Technology: Providing accommodations and using assistive technology can significantly help individuals with dyslexia succeed in school and beyond. Accommodations may include extra time on tests, oral examinations, or providing written instructions in an audio format. Assistive technology tools, such as text-to-speech software, audiobooks, and speech-to-text applications, can help individuals with dyslexia access written material and express themselves more easily.

• Building Self-Esteem and Confidence: Dyslexia can often lead to feelings of frustration, low self-esteem, and anxiety, particularly in educational settings where reading and writing are heavily emphasized. It is essential to provide emotional support, encouragement, and positive reinforcement to help individuals with dyslexia build confidence and resilience. Celebrating small successes, setting realistic goals, and emphasizing strengths can help boost self-esteem and motivation.

• Creating a Supportive Environment: A supportive environment, whether at home, in school, or in the workplace, is critical for individuals with dyslexia. This includes understanding and patience from family members, educators, and employers. Providing a structured and predictable environment, minimizing distractions, and encouraging open communication can create a positive and supportive atmosphere that fosters success and well-being.

Conclusion

Dyslexia is a complex and multifaceted condition that affects millions of people worldwide. While its exact causes are not fully understood, research has shown that genetic, neurobiological, and environmental factors all play a role in its development. The symptoms of dyslexia can vary widely, but common signs include difficulties with phonological processing, reading, writing, and spelling.

Effective strategies for supporting individuals with dyslexia include multisensory learning approaches, explicit phonics instruction, accommodations, and assistive technology. Additionally, fostering a supportive and encouraging environment is crucial in helping individuals with dyslexia achieve their full potential. By increasing awareness and understanding of dyslexia, we can better support those affected by it and promote a more inclusive and equitable society for all learners.

Read this guide “is dyslexia hereditary”, to know more information.