Gamma Sensory Flicker for Parkinson's Disease Patients With Freezing of Gait

Flicker exposure via a light and sound device-based stimulation-provided sensory stimulation device. The DAVID Delight Plus device consists of light-emitting goggles and sound-emitting headphones that are turned on and off with a repetition rate of 40 Hz connected to a controller operated by the participant or study partner (if the participant elects to have an optional study partner). At the baseline visit, light and sound intensity levels (auditory: 0-80 dBA, visual: 0-1400 lux) will be programmed into each participant's controller based on their unique response to tolerance and EEG entrainment testing which occurred at screening. The participant may not detect gamma-flicker frequency.

Sham therapy will be provided in the same manner as the flicker light. The difference is that it will be a constant light and sound from the same device instead of the 40hz light treatment and sound.