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A Versatile, Behavioral Method to Investigate Thyroid Hormone Effects on Cerebellar Function
Published on: October 6, 2023
Thyroid hormones and cognitive functioning in healthy, euthyroid women: a correlational study.
Miglena Grigorova1, Barbara B Sherwin
1Department of Psychology, McGill University, Montreal, Canada.
Hormones and Behavior
|March 1, 2012
Summary
Higher thyroid hormone levels, specifically free T3 and thyroglobulin antibodies (TgAb), may negatively impact executive functions in healthy women. This suggests a link between thyroid function and cognitive processes in the frontal cortex.
Area of Science:
- Neuroendocrinology
- Cognitive Neuroscience
Background:
- Thyroid hormones (THs) are crucial for brain development, function, and metabolism.
- Existing research on THs and cognition in healthy adults shows inconsistent findings, particularly in women.
Purpose of the Study:
- To investigate the relationship between thyroid hormone levels and neuropsychological test performance in healthy women.
- To explore potential links between free T3, thyroglobulin antibodies (TgAb), and executive functions.
Main Methods:
- 122 healthy, euthyroid women (mean age 51) underwent neuropsychological testing.
- Blood samples were analyzed for thyroid hormone levels and antibodies.
- Statistical correlations were performed between hormone levels and cognitive test scores.
Main Results:
- Elevated free T3 levels correlated with slower performance on Trail Making Test A & B and Tower of London.
- Higher TgAb levels were associated with increased errors on Trail Making Test B, Word Fluency, and Design Fluency.
- No significant correlations were found with mood, verbal memory, or working memory.
Conclusions:
- Within the normal range, higher free T3 and TgAb levels may negatively affect executive functions.
- Findings suggest a link between thyroid function and cognitive processes mediated by the frontal cortex.
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