RecruitingDiagnostic testUnderstanding and Preventing Cortical Mechanisms of Chemotherapy-induced Peripheral NeuropathyCohort 1: To track the onset and progression of a condition called chemotherapy-induced peripheral neuropathy (CIPN). Cohort 2: To track the onset and progression of a condition called chemotherapy-induced peripheral neuropathy (CIPN) and to test a certain type of experimental neuromodulation (stimulation of the brain) with a device called a closed-loop brain-computer interface (clBCI) to see if can help to prevent pain due to CIPN.