Brain activity during visuospatial working memory in congenital adrenal hyperplasia

Area of Science:

• Neuroscience
• Endocrinology
• Cognitive Psychology

Background:

• Congenital adrenal hyperplasia (CAH) necessitates lifelong cortisol replacement.
• Previous studies suggest cognitive deficits, particularly in working memory, in CAH patients.
• Long-term effects of CAH on brain function remain largely unknown.

Purpose of the Study:

• To investigate differences in brain activity during working memory tasks between individuals with CAH and healthy controls.
• To explore the long-term impact of CAH on brain function.

Main Methods:

• Functional magnetic resonance imaging (fMRI) was used to assess brain activity.
• Participants completed verbal and visuospatial working memory tasks.
• The study included 29 individuals with CAH and 40 healthy controls.

Main Results:

• Individuals with CAH exhibited faster responses on the verbal working memory task.
• No overall group differences in blood-oxygen-level-dependent (BOLD) response were found.
• Sex-specific interactions revealed increased activity in CAH males and decreased activity in CAH females in specific brain regions during visuospatial tasks.

Conclusions:

• Long-term cortisol imbalances in CAH do not appear to significantly alter overall brain responses during working memory.
• Sex-dependent alterations in the left dorsal visual stream activity may occur in CAH.
• Further research with more complex tasks is recommended to fully understand these effects.