Effect of auditory training on the middle latency response in children with (central) auditory processing disorder

Potencial Evocado Auditivo de Média Latência (PEAML) em crianças e adolescentes brasileiros: revisão sistemática

“…The literature search showed few studies with higher level of evidence (7,20,21) , which did not allow generalizations regarding the findings and hampered the standardization of testing protocols and the possibility to establish normative data of the MLR in different populations. Two studies (15,19) were conducted with almost experimental methodology and agreed with the authors (22,23) that indicate the comparison of pre and post-therapeutic intervention middle latency responses as an effective strategy to monitor changes in the auditory pathway. The MLR is a potential greatly influenced by endogenous artifacts (postauricular reflex, relaxation state, etc.)…”

“…The Na and Pa wave generators are related to primary auditory abilities and underlying cognitive processes such as memory and attention, and the most relevant clinical applications of MLR are related to the neurodiagnostic of injuries in the thalamocortical pathway in hearing alterations or its related cognitive processes (1,4) . Even in normal hearing individuals without associated comorbidities, the MLR changes were reported in 17.4% (12) to 64% (14) of the children and adolescents present in the evaluated studies. In both studies with lower (12) (14) Na and Pa peak latency; Na-Pa peak-to-peak amplitude to calculate EA or EE with 50% cutting point NI NI ANOVA, CI Schochat et al, 2010 (15) Latency at the most negative peak between 14-21ms (Na) and positive between 21-45ms (Pa); Na-Pa peak- (19) Na and Pa peak latency; Na-Pa and greater (14) prevalence of alteration of the potential in individuals without complaints or hearing functional alterations, the first considered only the latency and amplitude of the Pa wave and the second, the Na and Pa latency and the amplitude of the Na-Pa interpeak.…”

“…Even in normal hearing individuals without associated comorbidities, the MLR changes were reported in 17.4% (12) to 64% (14) of the children and adolescents present in the evaluated studies. In both studies with lower (12) (14) Na and Pa peak latency; Na-Pa peak-to-peak amplitude to calculate EA or EE with 50% cutting point NI NI ANOVA, CI Schochat et al, 2010 (15) Latency at the most negative peak between 14-21ms (Na) and positive between 21-45ms (Pa); Na-Pa peak- (19) Na and Pa peak latency; Na-Pa and greater (14) prevalence of alteration of the potential in individuals without complaints or hearing functional alterations, the first considered only the latency and amplitude of the Pa wave and the second, the Na and Pa latency and the amplitude of the Na-Pa interpeak. Studies show the Na-Pa amplitude as the most sensitive parameter to MLR changes, through the analysis of the ear and electrode effect (20)(21)(22) .…”

“…As a result of the initial search, 1315 articles were identified, of which eight (12)(13)(14)(15)(16)(17)(18)(19) met the inclusion criteria and were considered relevant for the sample of this study. The search process and selection of the articles present in this review are outlined in the Figure 1.…”

“…Studies with cross-sectional observational design (12)(13)(14)(16)(17)(18) represented 75% of the analyzed studies. The literature search showed few studies with higher level of evidence (7,20,21) , which did not allow generalizations regarding the findings and hampered the standardization of testing protocols and the possibility to establish normative data of the MLR in different populations.…”