Hydrocortisone alters brain networks involved in emotional memory

Researchers at Yale studied how cortisol may affect the separate processes of judging emotional intensity and forming lasting memories. Participants completed two sessions, receiving hydrocortisone in one and an inactive placebo in the other, while viewing images during functional MRI. They rated their emotional reactions, and researchers tested their recall the following day. The supplied report does not state the number of participants or the hydrocortisone dose.

The researchers report that hydrocortisone improved memory for emotionally significant images. In emotion-related networks, it was associated with more consistent activity patterns and greater engagement; in memory networks, activity patterns became more specialized for emotional information. The hormone also increased coordination between the two network types. The team analyzed functional connectivity in image-viewing trials of about five seconds, rather than relying on several minutes of imaging data.

The findings suggest that cortisol’s memory effects may be selective for emotionally meaningful experiences, rather than improving memory generally. This was a laboratory experiment using images and next-day recall, not a study of clinical outcomes or treatment. The supplied account omits key details, including sample size and dose, and the results do not establish that stress or hydrocortisone improves learning in clinical or everyday settings.