الفهرس 
HypothyroidismOnly 14 pages are availabe for public view
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Abstract
The thyroid hormone is responsible for regulating the metabolic rate of every cell in the body. The action of thyroid hormone is very important in many developmental processes, When the thyroid gland is malfunctioning, it can affect any system of the body including auditory system(Kumar et al., 2017).
Hypothyroidism is considered a cause of the diminution of hearing. Auditory dysfunction is reported frequently in relation to hypothyroidism, with sensorineural hearing impairment ranging from mild to severe degree(Lichtenberger-Geslin et al., 2013).
Auditory dysfunction is reported frequently in relation to hypothyroidism, with sensorineural hearing impairment ranging from mild to severe degree (Aftab and Jain, 2019)
This observational case control study was conducted to assess audio vestibular functions in cases of hypothyroidism in Audiology Unit, Menoufia University Hospital,
The study included sixty (60) patients who were attending Audiology Unit with established diagnosis of hypothyroidism based on classic clinical and laboratory features from August 2020 and August 2022.
Subjects included in this study were divided into two groups; Control group: consisted of 30 normal subjects, in the age range 30-50 years. Study group (hypothyroidism cases group): consisted of 30 subjects in the age range 30-50 years, with exclusion of patients suffering from other neurological diseases.
All hypothrodism patients in the study group were subjected to the following: full history taking, general examination, neurological examination including; Posture & gait tests, otoscopic examination of the ear, basic audiological evaluation by (Pure tone audiometry, Speech audiometry and Immittancemetry) and Video Nystagmography Test (VNG)
The study results revealed that the highest percentage of the cases were females.
The audio vestibular symptoms distribution in the study group, vertigo was existing in (10%), hearing loss in (16.7%) and tinnitus in (13.3%).
The pure tone audiometry results in the study group showed Bilateral normal hearing sensitivity in (83.3%), bilateral mild SNHL in 13.4 % bilateral moderate SNHL in (3.3%).Regarding the speech discrimination, it was good in (3.3%) and excellent in (96.7%).
There was no statistically significant difference between the hypothyroid and control groups as regards latency, velocity, and accuracy of saccade test. Regarding the smooth pursuit test, there was no statistically significant difference between the two studied groups as regards gain at low and high frequencies.
VNG showed within normal test results in both groups except 3 cases in the hypothyroid group who showed BPPV.