Analyse de la variabilité des courbes latence-intensité des potentiels évoqués auditifs précoces. Relation avec l’audiogramme

International audienc

Analyse de la variabilité des courbes latence-intensité des potentiels évoqués auditifs précoces. Relation avec l’audiogramme

International audienc

Analyse de la variabilité des courbes latence-intensité des potentiels évoqués auditifs précoces. Relation avec l’audiogramme

International audienc

Computer-assisted ABR Interpretation using the Automatic Construction of the Latency-Intensity Curve: Interpretatión asistida por computadora del ABR utilizando la Constructión Automática de la Curva Latencia-Intensidad

International audienceIn this paper, we present a new computerised technique for the automatic construction of the latency-intensity curve (LI curve). We take a pattern recognition approach determined by a priori information. We use knowledge gained from the audiogram and from physiological considerations. Therefore, we consider all recordings at different intensities as well as results from the extraction of a single auditory brainstem response (ABR) at a given stimulus intensity. We tested our method successfully: it allows us to prevent misrecognition errors in response detection or in latency measurements. Automatic recognition of the waves and recognition by the ear, nose and throat (ENT) specialist coincided in at least 90 per cent of cases. For wave V, the average deviation between the response thresholds given by our automatic recognition algorithm and those given by the ENT specialist was 5 dB, and the average deviation of the latencies was 0.05 ms.En este trabajo, presentamos una nueva técnica computarizada para la constructión automática de la curva de latencia-intensidad (Curva LI). Tomamos un enfoque de reconocimiento de patrones, supervisado por informatión a priori, y hacemos referenda al conocimiento obtenido del audiograma y también a otras consideraciones fisiológicas. Por lo tanto, consideramos todos los registros a difcrentes intensidades, al igual que los resultados dc la extractión de una respuesta auditiva del tallo cerebral (ABR) única, a una intensidad dada del estímulo. Evaluamos con éxito nuestro método, lo que nos permite evitar errores de reconocimiento en la identificatión de respuestas o en las medidas de latencia. El reconocimiento automático de las ondas y el reconocimiento por parte del especialista en oídos, nariz y garganta (ORL) coincidieron en el 90 por ciento de los casos. Para la onda V, la desviación promedio entre el umbral de respuesta dado por nuestro algoritmo de reconocimiento automático y la brindada por el especialista en ORL fue dc 5 dB, y la desviacion promedio de las latencias fue de 0.05 ms

A contribution to the debate on tinnitus definition

International audienceTinnitus is generally defined as an auditory perception in the absence of environmental sound stimulation. However, this definition is quite incomplete as it omits an essential aspect, the patient's point of view. This point of view constitutes, first and foremost, a global and unified lived experience, which is not only sensory (localization, loudness, pitch and tone), but also cognitive (thoughts, attentiveness, behaviors) and emotional (discomfort, suffering). This experience can be lived in a very unpleasant way and consequently have a very negative impact on quality of life. This article proposes and justifies a new definition for tinnitus elaborated by a group of French clinicians and researchers, which is more in line with its phenomenology. It also provides a minimum knowledge base, including possibilities for clinical care, hoping to eradicate all misinformation, misconceptions and inappropriate attitudes or practices toward this condition. Here is the short version of our definition: Tinnitus is an auditory sensation without an external sound stimulation or meaning, which can be lived as an unpleasant experience, possibly impacting quality of life