A comparative study on visual evoked potential (VEP) wave P100 latency in hypothyroid and euthyroid individuals
Keywords:
comparative study, evoked potential, hypothyroid, euthyroidAbstract
Hypothyroidism is classified as congenital and acquired according to the time of onset. Consequences of thyroid gland dysfunction also depend on the life stage at which they occur. Peripheral and central nervous system dysfunction are important clinical features of congenital as well as acquired hypothyroidism. Although thyroid hormone effects on the brain are most prominent in development, also in adult-acquired hypothyroidism symptoms such as sensory impairments, disagreeable smells and taste, slowness of thought and action, changes of speech, irritability, headaches ,sleep disturbances, confusion up to delusions and Hallucinations, impairments of memory, of vision as well as of hearing frequently occur. The most prominent and first significant clinical symptom to develop in hypothyroidism is a slowing of speech and of visual perception. These findings indicate CNS involvement in hypothyroidism. VEP may be a useful test to detect these changes in early stage of disease.
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