The purpose of this study is to understand how chemotherapy affects brain function and brain chemistry. The study is looking at cognitive deficits, which means changes in memory and thinking skills, in breast cancer survivors compared to healthy women. This study investigates how these changes occur after chemotherapy treatment.

Participants will undergo screening procedures to confirm eligibility, which include answering questions and taking a pregnancy test. The study involves visits that may take about 4-5 hours, possibly spread over 2 days. Participants will be reimbursed $100 for their time and effort.

• Who can participate: Women who are breast cancer survivors, having completed chemotherapy 6 months to 5 years ago, or healthy women can participate. Participants should be able to understand and complete study procedures in English. Key exclusions include neurological disorders, pregnancy, smoking, and certain medication use.
• Study details: Participants will answer questions and undergo a pregnancy test to check eligibility. Participants will be paid $100 for their participation. A placebo is not involved in this study.