Increase in acoustic reflex latency (time between stimulus onset and response) provides a highly specific and sensitive sign for early detection of lesions of the first or second auditory neurones. The performance of a new apparatus, including an Amplaid 702 impedance meter with a specially designed numeric oscilloscope, employed systématically for all audiometric examinations (87 subjects) was compared with that of a reference apparatus (Madsen ZO 73 + Elema Schoenander-jet ink recorder). The new apparatus provided a very simple, precise, and rapid method for measuring acoustic reflex latency. The technique has its limits, however, of critical importance being the determination of the acoustic reflex threshold at close to 1 dB (modification of the apparatus), the means for measuring latency, and the use of three criteria for distinguishing retrocochlear lesions from others. The effect of age on latency, variations in the test-retest results according to the type of deafness, and the influence of averaging techniques are discussed. Typical retrocochlear lesions were rare in this series, and the 5 cases observed are described in detail, followed by a discussion of the advantages and inconveniences of systematic as against selective screening.
Download full-text PDF |
Source |
|---|
Publication Analysis
Top Keywords
Similar Publications
Effects of rapid maxillary expansion on auditory thresholds and middle ear functioning.
Codas
January 2025
Instituto de Psicologia, Serviço Social, Saúde e Comunicação Humana, Universidade Federal do Rio Grande do Sul - UFRGS - Porto Alegre (RS), Brasil.
Purpose: To ascertain whether Rapid Maxillary Expansion (RME) elicits effects on the functioning of the middle ear and air-bone gaps in children and adolescents.
Methods: Single-arm clinical trial, with data collection at four time points: before initiating Rapid Maxillary Expansion (RME) (T0), upon completion of RME (T1), three months post-RME completion (T2), and six months post-RME procedure (T3). The audiological assessment, conducted at all four time points, comprised otoscopy, pure tone and speech audiometry, tympanometry, and acoustic reflex investigation.
Effect of induced astigmatism on vestibulo-ocular reflex.
Clin Exp Optom
January 2025
Department of Optometry, School of Paramedical and Rehabilitation Sciences, Mashhad University of Medical Sciences, Mashhad, Iran.
Clinical Relevance: The vestibular-ocular reflex stabilises the retinal image and maintains balance during head movement. Astigmatism is one of the common refractive errors that can reduce the quality of visual inputs.
Background: The purpose of this study was to investigate the effect of induced astigmatism on the function of the vestibular-ocular reflex.
Effects of Metabolic Dysfunction-Associated Steatohepatitis in Alertness, Associative Learning, and Astrocyte Density.
Brain Behav
January 2025
INEUROPA, Instituto de Neurociencias del Principado de Asturias, Oviedo, Spain.
Purpose: Metabolic dysfunction-associated steatohepatitis (MASH) is a prevalent disease caused by high fat and high cholesterol intake, which leads to systemic deterioration. The aim of this research is to conduct a psychobiological exploration of MASH in adult male rats.
Methods: Subjects who were administered a high-fat and high-cholesterol diet for 14 weeks.
[Acoustic reflex as one of the indicators of the maturity of the functioning of the auditory analyzer].
Vestn Otorinolaringol
December 2024
Pirogov Russian National Research Medical University, Moscow, Russia.
Unlabelled: The acoustic reflex is a physiological protective mechanism of the sound-conducting system of the auditory analyzer, which allows to identify various retrocochlear lesions of the human auditory system. The absence of its registration may indicate both pathology and immaturity of the auditory analyzer in children of the first year of life.
Objective: To register the acoustic reflex in children of the first year of life, to identify a full-fledged acoustic reflex at various frequencies and to analyze the dependence of its appearance on the timing of gestation.
The role of deep layer superior colliculus neurons in prepulse inhibition and the impact of spatial separation in male rats.
Neuroscience
February 2025
School of Psychological and Cognitive Sciences, Peking University, Beijing 100080, China.
Prepulse inhibition (PPI) refers to the phenomenon in which a weak sensory stimulus before a strong one significantly reduces the startle reflex caused by the strong stimulus. Perceptual spatial separation, a phenomenon where auditory cues from the prepulse and background noise are distinguished in space, has been shown to enhance PPI. This study aims to investigate the neural modulation mechanisms of PPI by the spatial separation between the prepulse stimulus and background noise, particularly in the deep superior colliculus (deepSC).
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!