Location
Moultrie, GA
Start Date
17-4-2026 12:00 PM
End Date
17-4-2026 1:00 PM
Description
Introduction:
Thyroid disorders are among the most prevalent endocrine conditions worldwide, impacting an estimated 200 million individuals globally. Despite their prevalence, the neuropsychiatric sequela of thyroid dysfunction is still underrecognized in clinical practice, contributing to delayed diagnosis and misattribution of psychiatric symptoms to primary mental health disorders. Thyroid hormones play a critical role in central nervous system function throughout the lifespan, influencing neurotransmission, neuronal metabolism, and blood-brain barrier integrity. Both hypothyroidism and hyperthyroidism have been associated with a broad spectrum of neuropsychiatric manifestations such as depression, anxiety, mania, cognitive impairments, psychosis, and dementia. This review aims to synthesize the current literature on neuropsychiatric manifestations across the spectrum of thyroid dysfunction, with implications for psychiatric screening and interdisciplinary management.
Methods:
A structured literature review was performed using PubMed/MEDLINE, PsycINFO, and Google Scholar. Search terms included combinations of “thyroid disorders”, “hypothyroidism”, “Hashimoto’s thyroiditis”, “Graves’ disease”, “neuropsychiatric manifestations”, “depression”, “anxiety”, “psychosis”, “mania”, “cognitive impairment”, and “dementia”. Eligible studies were peer-reviewed articles published in English between 2000 and 2024, including systematic reviews, meta-analyses, randomized controlled trials, and high-quality observational studies. Studies focusing on pediatric populations or congenital hypothyroidism were excluded. A total of 31 studies met final inclusion criteria and were qualitatively synthesized according to thyroid condition and neuropsychiatric domain.
Results:
Hypothyroidism was most consistently associated with depressive disorders, with a recent meta-analysis reporting a moderate association between hypothyroidism and major depressive disorder, with stronger effects observed among female patients. In addition to depressed mood, overt hypothyroidism has been linked to cognitive decline and psychomotor slowing. In more severe cases, patients may develop rare but serious neuropsychiatric complications, including myxedema psychosis and catatonia. Subclinical hypothyroidism has been observed to produce more subtle effects, though evidence suggests it still contributes to clinically meaningful changes in mood and cognitive functioning. In contrast, hyperthyroidism and other thyrotoxic states were more frequently associated with anxiety, emotional lability, and irritability. Dysregulation of the hypothalamic-pituitary-thyroid axis has been proposed as a shared pathophysiological pathway linking thyroid dysfunction with mood and cognitive disorders. Thyroid hormone plays an important role in modulating neurotransmitter systems, including serotonin, dopamine, and norepinephrine. Notably, a subset of patients continue to experience neuropsychiatric symptoms despite biochemical normalization of thyroid function, suggesting that additional neurobiological mechanisms may be involved.
Discussion:
Thyroid dysfunction represents a clinically significant and potentially reversible cause of neuropsychiatric symptoms. The wide spectrum of psychiatric presentations – from treatment resistant depression to acute psychosis – highlights the importance of routinely evaluating thyroid function during psychiatric assessments. Clinicians should remain attentive to the possibility of thyroid-related causes, particularly when patients present with atypical symptom patterns, limited response to psychotropic medications, or accompanying physical complaints suggestive of endocrine disorders. Although normalization of thyroid functions often improve psychiatric symptoms, some individuals continue to experience mood or cognitive disturbance even after reaching euthyroid state. Further research should aim to better understand the potential role of adjunctive thyroid hormone therapy in the treatment of mood disorders.
Embargo Period
5-26-2026
Included in
The thyroid-brain connection: neuropsychiatric manifestations of thyroid disorders
Moultrie, GA
Introduction:
Thyroid disorders are among the most prevalent endocrine conditions worldwide, impacting an estimated 200 million individuals globally. Despite their prevalence, the neuropsychiatric sequela of thyroid dysfunction is still underrecognized in clinical practice, contributing to delayed diagnosis and misattribution of psychiatric symptoms to primary mental health disorders. Thyroid hormones play a critical role in central nervous system function throughout the lifespan, influencing neurotransmission, neuronal metabolism, and blood-brain barrier integrity. Both hypothyroidism and hyperthyroidism have been associated with a broad spectrum of neuropsychiatric manifestations such as depression, anxiety, mania, cognitive impairments, psychosis, and dementia. This review aims to synthesize the current literature on neuropsychiatric manifestations across the spectrum of thyroid dysfunction, with implications for psychiatric screening and interdisciplinary management.
Methods:
A structured literature review was performed using PubMed/MEDLINE, PsycINFO, and Google Scholar. Search terms included combinations of “thyroid disorders”, “hypothyroidism”, “Hashimoto’s thyroiditis”, “Graves’ disease”, “neuropsychiatric manifestations”, “depression”, “anxiety”, “psychosis”, “mania”, “cognitive impairment”, and “dementia”. Eligible studies were peer-reviewed articles published in English between 2000 and 2024, including systematic reviews, meta-analyses, randomized controlled trials, and high-quality observational studies. Studies focusing on pediatric populations or congenital hypothyroidism were excluded. A total of 31 studies met final inclusion criteria and were qualitatively synthesized according to thyroid condition and neuropsychiatric domain.
Results:
Hypothyroidism was most consistently associated with depressive disorders, with a recent meta-analysis reporting a moderate association between hypothyroidism and major depressive disorder, with stronger effects observed among female patients. In addition to depressed mood, overt hypothyroidism has been linked to cognitive decline and psychomotor slowing. In more severe cases, patients may develop rare but serious neuropsychiatric complications, including myxedema psychosis and catatonia. Subclinical hypothyroidism has been observed to produce more subtle effects, though evidence suggests it still contributes to clinically meaningful changes in mood and cognitive functioning. In contrast, hyperthyroidism and other thyrotoxic states were more frequently associated with anxiety, emotional lability, and irritability. Dysregulation of the hypothalamic-pituitary-thyroid axis has been proposed as a shared pathophysiological pathway linking thyroid dysfunction with mood and cognitive disorders. Thyroid hormone plays an important role in modulating neurotransmitter systems, including serotonin, dopamine, and norepinephrine. Notably, a subset of patients continue to experience neuropsychiatric symptoms despite biochemical normalization of thyroid function, suggesting that additional neurobiological mechanisms may be involved.
Discussion:
Thyroid dysfunction represents a clinically significant and potentially reversible cause of neuropsychiatric symptoms. The wide spectrum of psychiatric presentations – from treatment resistant depression to acute psychosis – highlights the importance of routinely evaluating thyroid function during psychiatric assessments. Clinicians should remain attentive to the possibility of thyroid-related causes, particularly when patients present with atypical symptom patterns, limited response to psychotropic medications, or accompanying physical complaints suggestive of endocrine disorders. Although normalization of thyroid functions often improve psychiatric symptoms, some individuals continue to experience mood or cognitive disturbance even after reaching euthyroid state. Further research should aim to better understand the potential role of adjunctive thyroid hormone therapy in the treatment of mood disorders.