Assessment of the Brainstem-Mediated Stapedius Muscle Reflex in Andean Children Living at High Altitudes
| Autor: | S. Allen Counter, Leo H. Buchanan, Göran Laurell, Fernando Ortega, Anthony B. Jacobs |
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| Rok vydání: | 2017 |
| Předmět: |
Male
medicine.medical_specialty Adolescent Physiology Audiology Stapedius muscle 03 medical and health sciences 0302 clinical medicine Altitude Evoked Potentials Auditory Brain Stem Humans Medicine Child 030223 otorhinolaryngology Acoustic reflex business.industry Public Health Environmental and Occupational Health Stapedius General Medicine Anatomy Healthy Volunteers Reflex Acoustic Acoustic Impedance Tests Child Preschool Reflex Female Ecuador Brainstem business 030217 neurology & neurosurgery |
| Zdroj: | High Altitude Medicine & Biology. 18:37-45 |
| ISSN: | 1557-8682 |
| Popis: | Counter, S. Allen, Leo H. Buchanan, Fernando Ortega, Anthony B. Jacobs, and Göran Laurell. Assessment of the brainstem-mediated stapedius muscle reflex in Andean children living at high altitudes. High Alt Med Biol. 18:37-45, 2017.-This study examined the physiological thresholds, amplitude growth, and contraction duration of the acoustic stapedius reflex (ASR) in Andean children aged 2-17 years living at altitudes of 2850 m (Altitude I Group) and 3973 m (Altitude II Group) as part of a general medical assessment of the health status of the children. The brainstem-mediated ASR reveals the integrity of the neuronal components of the auditory reflex arc, including the cochlea receptors, eight cranial nerves, and brainstem neural projections to the cochlear nuclei, bilateral superior olivary nuclei, facial nerve nuclei, and facial nerve and its stapedius branch. Uncrossed (ipsilateral) and crossed (contralateral) ASR thresholds (ASRT), ASR amplitude growth (ASRG) function, and ASR muscle contraction duration (decay/fatigue) (ASRD) were measured noninvasively with 500, 1000 Hz and broadband (bandwidth = 125-4000 Hz) noise stimulus activators using a middle ear immittance system. Oxygen saturation (SaO |
| Databáze: | OpenAIRE |
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