Heather R. McGregor

This study examines how artificial gravity affects brain functional connectivity during bed rest, finding differential changes in somatosensory regions and mobility outcomes between groups receiving continuous vs. intermittent artificial gravity.

This study examines how spaceflight duration and prior experience affect brain structure in astronauts, finding greater ventricular expansion and white matter decline with longer missions and more prior flights.

This study shows that daily artificial gravity reduces brain activation during sensorimotor adaptation compared to head-down tilt bed rest.

This study examines how brain structure relates to balance in young and older adults under different sensory conditions, finding associations between cortical thickness, gyrification, and white matter microstructure with balance performance.

This study examines how brain structure relates to dual task walking in young and older adults, finding age-specific associations between brain atrophy and gait performance during cognitive tasks.

This study examines how long-duration spaceflight affects sensorimotor control and cognition, finding transient declines in mobility, balance, and bimanual coordination that recover within 30 days, while cognitive performance remains stable.

This study examines how spaceflight affects MRI-visible perivascular spaces (PVSs) in astronauts, finding that novice astronauts show increased PVS volume post-flight, while experienced astronauts show baseline correlations between flight days and PVS length.

This study examines resting-state functional connectivity changes in a spaceflight analog, finding distinct patterns in those who develop optic disc edema compared to those who do not.

This study tests if levodopa affects reward- and error-based motor adaptation, finding no significant effects on adaptation or neural responses to reward feedback.

This study shows that reversed visual feedback during unimanual training reduces somatosensory cortical excitability, which may enhance motor performance through sensory gating.

This study examines how a spaceflight analog environment with elevated CO2 affects brain connectivity and sensorimotor performance over time.