Electrophysiological testing in patients with central auditory processing disorder before and after auditory training: role of the P300
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Introduction: Central auditory processing disorder (CAPD) affects approximately 2–5% of school-aged children and up to 76% of older adults, significantly impacting language, communication, and learning. Diagnosis requires both behavioral and electrophysiological testing to assess auditory pathway function and cortical activity related to sound processing. Objective: To document, for the first time in Colombia, the results of electrophysiological tests in patients with CAPD. Materials and methods: A descriptive observational study was conducted at IPS Oigamos in Medellin (2015-2023). Sociodemographic, audiological, behavioral, and electrophysiological variables (ABR, MLR, and P300) were analyzed, along with follow-up after auditory training in a subgroup of patients. Results: A total of 47 patients with CAPD were evaluated, with a median age of 8 years and a male predominance (57.8%). Initial tests showed normal latencies in the ABR, abnormalities in the MLR, and prolonged latencies in the P300. In the subgroup that underwent auditory training, a significant reduction in P300 latency was observed. Discussion: The findings suggest that the P300 potential is a sensitive marker of central auditory dysfunction, as it is prolonged at diagnosis and improves after intervention. Conclusion: The results indicate that the P300 potential could be a valuable tool for the diagnosis and follow-up of CAPD. Despite its limitations, this study represents a relevant contribution to the understanding of CAPD in the Colombian context.
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ISSN: 0120-8411
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