In the late 1800s James Hinshelwood, an eye surgeon, began seeing more patients arrive at his clinic needing assistance with the inability to learn how to read written words. These individuals were usually sent first to an eye specialist to assess their eye sight capabilities. He began to compare his notes with other physicians who had similar cases. The cases revealed patterns for the inability to read. These individuals had normal eye sight and oral language skills. Some individuals had learned how to read, but lost the ability due to an illness or injury. These cases gave knowledge about the parts of the brain necessary to read written words and what part of the brain may be impinging an individual’s ability to learn how to read. Some cases gave knowledge of the parts of the brain that may be affecting an individual’s ability to learn how to read. The second category that the cases revealed was students who were struggling to learn how to read for the first time. These students had no prior history of brain injuries and had normal eye sight and oral language skills. Hinshelwood theorized that some individuals have visual memory deficits, while others have auditory deficits. He also theorized that individuals with a visual memory deficit and no prior history of brain injury gained their inability to learn how to read through genetics. He called this congenital word-blindness (Hinshelwood, 1912). Current research has confirmed and expanded his theory that the visual memory or occipital lobe does not initial develop to support individuals who are learning how to read.
Researchers have identified three regions of the brain necessary to read written words effectively (Pugh et al. 2000; Shaywitz, 2003; Eden, 2004; Dehaene, 2009; Hoeft 2013; Gaab 2020). The first region is the anterior-interior gyrus or auditory component. The second region is the temporoparietal or processing component. The third region is the occipitotemporal or visual component. I discussed these regions of the brain in greater detail during my August 2018 blog, titled “Understanding How the Brain Processes Words.”
The prior components or working mechanisms of the brain must develop individually before developing coordinating connections between the necessary regions of the brain to read effectively. It normally takes the first five years of life to develop each component of the reading brain separately before the connections begin to develop for reading words (Gotlieb, Rhinehart, & Wolf, 2022). In my last blog, I discussed how students with dyslexia are initially wired and how the right side of the brain compensates until new highways and byways develop to connect the essential components in the left side of the brain. Hinshelwood (1912) discovered that individuals with word-blindness suffered from a deficit in visual memory and usually had good auditory processing/memory abilities. Individuals with word-blindness or dyslexia are developing the initial visual memory component, while simultaneously building the connections to different locations in the brain to read effectively.
Through working with patients of different ages who were learning how to read and by reviewing other cases with similar issues, Hinshelwood (1912) learned that individuals who were struggling to learn how to read needed a different formula of instruction than the current widely used formula of teaching students how to read. At the time students were being taught how to read using the “look and say” or whole word method of learning how to read.
“In the “say and look” method the child is taught to recognize printed words as a whole, not to recognize the words by spelling them out letter by letter, and hence it is claimed that the child learns to read more rapidly, as the process of reading by visual recognition alone dispenses with necessity of the child learning to spell before learning to read, as in the old method” (Hinshelwood, pg. 1034-35).
He learned that these individuals need to be taught by learning how to spell or encoding words, which entails first learning the names of letters or phonics instruction (Hinshelwood, 1912).
He also learned that exhaustion was often present with these students when they were learning how to read. In one case “She could not study at first for more than ten minutes at a time, as exhaustion soon came on and she had to stop” (Hinshelwood, 1912, pg. 1033). In another case “It took so much out of him, as he expressed it, and required such intense mental effort, and he was making such little progress that he felt constrained to abandon any further attempts towards learning to read” (pg. 1033). We know today that much of the exhaustion is from rewiring or growing new connections in their brain to accommodate the lack of initial or genetically developed structure to learn how to read. The exhaustion is often seen as frustration, laziness, or lack of wanting to learn how to read. The brain is trying to catch-up by building the initial foundations, while learning new information that the brain does not have the proper foundation for. The exhaustion usually diminishes over time, as individuals become better readers.
Hinshelwood in the early 1900s presented the theory that the earlier individuals begin to receive intervention in learning how to read the more quickly they will be able participate socially and academically with their peers. There is now research to support the type of assessment and instruction for students that show signs of dyslexia before they arrive in kindergarten.
Children born of families with a history of dyslexia are 50% more likely to struggle in learning how to read. The severity of dyslexia usually varies.
References
Dehaene, S. (2009). Reading in the Brain. Penguin Group.
Eden GF, Jones KM, Cappell K, Gareau L, Wood FB, Zeffiro TA, Dietz NA, Agnew JA, Flowers DL. Neural changes following remediation in adult developmental dyslexia. Neuron. 2004 Oct 28;44(3):411-22. doi: 10.1016/j.neuron.2004.10.019. PMID: 15504323.
Pugh KR, Mencl WE, Shaywitz BA, Shaywitz SE, Fulbright RK, Constable RT, Skudlarski P, Marchione KE, Jenner AR, Fletcher JM, Liberman AM, Shankweiler DP, Katz L, Lacadie C, Gore JC. The angular gyrus in developmental dyslexia: task-specific differences in functional connectivity within posterior cortex. Psychol Sci. 2000 Jan;11(1):51-6. doi: 10.1111/1467-9280.00214. PMID: 11228843.
Eden, G., Hoeft, F., Moats, L., & Pugh, K. (2013 & 2014). International Dyslexia Association Conference.
Gaab, N. (2020). Moving from reactive to a proactive model in education framework of Reading development can inform educational practice and policy. International Dyslexia Association Conference.
Gotlieb, R., Rhinehart, L., & Wolf, M. (2022). The “reading brain” is taught, not born: evidence from the evolving neuroscience of reading for teachers and society. The Reading League Journal, 11-16. https://www.thereadingleague.org/wp-content/uploads/2022/10/The-Reading-Brain.pdf
Healy, J. (2010). Different Learners. New York: Simon & Schuster
Hinshelwood, J. (1911). Two cases of hereditary congenital word-blindness. The British Medical Journal, 608.
Hinshelwood, J. (1912). The treatment of word-blindness, acquired and congenital. The British Medical Journal, 1033.
Shaywitz, S. (2003). Overcoming Dyslexia. Alfred A. Knoft.
Turesky, T., Escalante, E., Loh, M., & Gaab, N. (2025). Longitudinal trajectories of brain development from infancy to school age and their relationship with literacy development. PNAS, 122(24), 1-12. https://doi.org/10.1073/pnas.2414598122

regions work as a team to read written words. https://www.zaner-bloser.com/research/building-the-reading-brain
he “lazy” look. These individuals usually need direct, explicit instruction to help develop the necessary connections in the left side of the brain.