{"id":4002,"date":"2022-04-01T05:52:37","date_gmt":"2022-04-01T05:52:37","guid":{"rendered":"https:\/\/therapeuticliteracycenter.com\/?p=4002"},"modified":"2024-11-11T00:24:41","modified_gmt":"2024-11-11T00:24:41","slug":"hearing-disabilities","status":"publish","type":"post","link":"https:\/\/therapeuticlearning.com\/hearing-disabilities\/","title":{"rendered":"Early Detection of Hearing Disabilities"},"content":{"rendered":"
Every time my kids get a check-up, it strikes me that pediatricians are checking eyes and ears in the same way they\u2019ve been checking for at least the last 50 years (yep, I just turned 50). \u00a0True, a general practitioner will typically only screen for evidence of deeper issues and then refer onward if something suspicious or ‘outside the normal range’ is found. \u00a0But in light of my 11 year old son being diagnosed with APD (Auditory Processing Disorder<\/a>), it occurs to me that the current hearing testing conducted by schools and pediatricians is woefully inadequate because it is incapable of discovering the range of hearing disabilities we know to be present in the population today. \u00a0Instead, we end up waiting until these hearing disabilities manifest in children as inability to read, write, and learn at grade level, and often failing or borderline performance by older students who are unable to learn in a typical classroom environment and are likely suffering emotional and psychological harm.<\/p>\n To appreciate this difference let\u2019s consider current vision testing. Children are asked to discern whether arrows are pointing up down or sideways, or whether a shape is a smooth circle or star with points, and whether one shape is bigger or smaller than another, and so on. \u00a0But what if the vision test merely involved flashing a dot in different areas of a screen and asking whether the person sees anything? \u00a0And they only need to answer Yes or No to determine vision health? \u00a0\u00a0In that case, pretty much everyone except the most extreme visually disabled individuals would \u2018pass\u2019. \u00a0Fortunately that doesn\u2019t happen and so we don\u2019t have to wait until kids suffer numerous physical injuries from walking into tables and falling down steps, or flunk out of pre-school before we begin to suspect that there are vision problems.<\/p>\n So why are we still simply asking kids to discern mere audiometric thresholds when we know that other attributes of sound such as rhythm, pitch, timbre, and localization are just as important to function well in our current environment? \u00a0The unfortunate truth is that the professional community cannot come to an agreed-upon set of cues that reflect appropriate hearing ability and fidelity. \u00a0Part of the frustration is that neurobiologists and neuropsychologists don\u2019t really fully understand the mechanisms of how people hear and what the brain does with what the ear detects. \u00a0But the research is ongoing and our understanding continues to develop and deepen. \u00a0Findings in the last couple of years that I\u2019ll share are truly exciting because they bring us closer to a time when some simple, early diagnostics will reveal a more detailed picture of a person\u2019s hearing ability and alert parents and professionals of issues to be addressed early on in the child\u2019s life.<\/p>\n A few years ago, studies by Ruggles, et.al. demonstrated quite elegantly the critical role of temporal cues on sound perception and analysis or decoding. What\u2019s most exciting about the work is that they also designed and demonstrated a series of tests which detected temporal dysfunction. \u00a0Temporal cues are things like vowel sounds (long or short), articulation of consonants, stress or inflection in a word or phrase. \u00a0Researchers and clinicians have known for decades that temporal cues are important. \u00a0But reliable, definitive screening and diagnostic methods have been lacking. \u00a0The tests described in the Ruggles report were objective, uncomplicated, easy to grasp, and relatively easy to administer and interpret. In short, the team showed the feasibility and benefits of conducting more sophisticated auditory screening tests.<\/p>\n As parents and therapists, we\u2019re always promoting awareness of the spectrum of hearing and learning deficits. \u00a0But this is the sort of work that helps arm us better to promote the need for developing and implementing proactive screenings that are reliable and feasible. \u00a0Now, ‘fast-forward’ a few years to September 2014 when another article caught my eye and it is exactly the kind of big news we need! \u00a0I say this because the research and its implications are so elegant that it\u2019s easy for just about anyone to grasp the work and its implications.<\/p>\n Nina Kraus and her colleagues of the Auditory Neuroscience Laboratory at Northwestern University study the changes in the brain that happen with auditory learning. The findings in some of their most recent work with very young children hint at another type of diagnostic for disabilities in speech processing. \u00a0The exciting thing here is that it\u2019s for children that have not even begun to read or exhibit other higher level language skills yet!<\/p>\n Much of the laboratory\u2019s work has centered on the idea that beat synchronization ability (i.e. matching a given rhythm or beat) is closely related to the ability to process temporal cues – just like the ability in encoding speech. In this way, poor neural precision may contribute to both rhythmic and phonological deficits. \u00a0Indeed, previous work has shown that beat synchronization and processing of speech have been linked to reading skills. \u00a0In their work published in September 2014, the group established links between beat synchronization and speech processing in children who have not yet begun to read. This is very exciting work because children this young are not often looked at for deficits in language development.<\/p>\n To do this, the researchers placed children in groups based on how well they could synchronize beating a drum in rhythm with the teacher. \u00a0It\u2019s important to note that there were no differences in intelligence or vocabulary performance between the groups of synchronizers and non-synchronizers.<\/p>\n They recorded the brainwaves in response to specific syllable sounds like \u201cba\u201d and \u201cda\u201d. \u00a0They also looked at brainwaves when the syllable sounds were mixed in with background noise to see if the children could discriminate the syllables despite the noise. \u00a0What they found was the children who could not synchronize well also did not perform as well on tests that measure abilities important for developing later reading and language language skills (for example, identifying rhyming words). They especially did not do well at distinguishing syllables played in background noise. \u00a0The children who were able to follow the beat successfully were not only better at discriminating melodies and rhythms in music, but they were able to process syllable sounds more precisely and performed better on the multiple tests of language abilities.<\/p>\n Although this summary may sound somewhat simplistic, the methods were rigorous and the results highly significant. \u00a0The results show beautifully that rhythmic ability is correlated with how precisely a child\u2019s brain will decode speech syllables. \u00a0The findings also strongly indicate that a preschooler\u2019s ability to follow a beat will predict how advanced their developing language skills are; that less developed skills could predict future reading disabilities. \u00a0To test this, they have set up a 5 year study to track the same children to see whether these early deficits predict reading and speech processing disorders.<\/p>\n What they find may mean that in the future, doctors and caregivers may have the means to assess the very young for risk of developing reading and related learning disabilities. \u00a0And intervention (such as music games to improve rhythmic perception) could in theory be highly successful since at such a young age children\u2019s brains are most malleable.<\/p>\n Our job as parents, teachers, and caregivers is to continue promoting awareness of the spectrum of hearing disorders, and emphasize how important it is to recognize and identify them early on. \u00a0If we keep at it, then perhaps we won\u2019t have to wait the typical 10 years it often takes for life science research to make it to the actual changes in the clinical and healthcare practices. \u00a0For more information check out the resources below.<\/p>\n To learn more, call 858) 481-2200 to schedule a FREE consultation<\/a> with Executive Director Maria Bagby.<\/p>\n References<\/strong><\/p>\nEarly Detection of Hearing Disabilities<\/span><\/h1>\n
\n