Dyslexia is a neuronal disorder that hinders language ability to learn to read and write to varying degrees, and there are hereditary factors that predispose to suffer from it. However, other factors that may be involved in the course of the disorder are still unclear. Recent research now ensures that An anomaly in the process of auditory signals is the main cause of dyslexia.
The work, prepared at the Superior Normal School in Paris and directed by Anne-Lise Giraud, focused on the idea that an anomaly in the initial processing of phonemes could have a direct impact on speech processing.
The researchers found that the typical brain processing of the auditory rhythms associated with the phonemes is disrupted in the left auditory cortex of dyslexics and that this deficit was correlated with the processing measures of speech sounds.
The study suggests that the left auditory cortex of people with dyslexia may be less sensitive to modulations at very specific frequencies They are optimal for the analysis of speech sounds and too sensitive to higher frequencies, which is potentially detrimental to their short-term verbal memory ability.
We already knew of a study that related dyslexia with difficulties in following musical rhythms, and this work, published on December 22 in "Cell Press - Neuron", affects the auditory factor as a determinant in dyslexia.
Remember the main symptoms of dyslexia, disorder that in this study is related to the referred auditory anomaly:
- Difficulty paying attention to the sounds of individual speech.
- Limited ability to repeat a list of 'pseudowords' or numbers.
- Slow performance when asked for the name of a series of images and colors quickly.
It has been given in this way one more step in the knowledge of dyslexia, because if this relationship with the specific auditory deficiency is confirmed, a path to new investigations and treatments is opened.
