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Thyroid Hormone Cognition

Meaning

Thyroid Hormone Cognition refers to the direct and critical influence of the thyroid hormones, specifically triiodothyronine (T3) and thyroxine (T4), on brain development, neuronal function, and adult cognitive performance, including memory, attention, and processing speed. Optimal cognitive function requires precise and stable euthyroid status, as both hypothyroidism and hyperthyroidism can profoundly impair neurocognitive processes. This connection highlights the brain’s high sensitivity to even subtle fluctuations in thyroid hormone signaling.