Temporal sampling theory applied to language disorders: an analysis from a neuroconstructivist perspective
*Correspondencia: Dra. Pastora Martínez Castilla. C/ Juan del Rosal, 10. E-28040 Madrid. E-mail: pastora.martinez@psi.uned.es
Introduction: From a neuroconstructivism perspective, subtle atypicalities in low-level processes have a cascading impact on the domains for which these processes are relevant. Atypicalities in a given process contribute to accounting for the phenotype of different developmental disorders. According to current classification criteria, language disorders can occur in different developmental conditions. The temporal sampling theory has been proposed as a framework for such disorders. In this work, this theory is reviewed and analyzed from the aforementioned neuroconstructivism claims.
Development: The temporal sampling theory explains how atypicalities in the perception of the rise time acoustic parameter in the slowest temporal window of the auditory signal and, linked to this, potential atypicalities in the entrainment of the signal and the neural oscillations in the auditory cortex involve difficulties for language and music development. These atypicalities are linked to a different experience with the stimuli. In turn, the different experience derives from differences in rise time discrimination thresholds and in the received input that is related to this parameter.
Conclusions: The temporal sampling theory offers an explanation that is consistent with the neuroconstructivism perspective. There is evidence of rise time perception difficulties and their relationship with language and music in children with developmental language disorder and/or dyslexia. Future studies should analyze the reach of this theory to explain language disorders in different developmental conditions.
Desarrollo La teoría del muestreo temporal plantea cómo alteraciones en la percepción del parámetro acústico del tiempo de ascenso de la amplitud en la ventana temporal lenta de la señal auditiva y, ligado a ello, posibles alteraciones en el acoplamiento entre dicha señal y las oscilaciones neurales de la corteza auditiva acarrean dificultades para el desarrollo lingüístico y musical. Tales alteraciones se vinculan a experiencias distintas con la información estimular, derivadas de diferencias en los umbrales de discriminación del tiempo de ascenso de la amplitud y en el input recibido asociado a este parámetro.
Conclusiones La teoría analizada ofrece una explicación consistente con el marco neuroconstructivista. Existe evidencia acerca de las dificultades perceptivas del tiempo de ascenso de la amplitud y su relación con los dominios lingüístico y musical en niños con trastorno del desarrollo del lenguaje y/o con dislexia. Estudios futuros deberían analizar el alcance de esta teoría para explicar los trastornos del lenguaje en otras condiciones evolutivas.