Banca de DEFESA: IARA BEATRIZ SILVA FERRE

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : IARA BEATRIZ SILVA FERRE
DATE: 16/03/2020
TIME: 14:00
LOCAL: Sala Sagui
TITLE:

Dynamics of cortical neural activity during pedaling: modulation by visual stimuli

KEY WORDS:

Parkinson's disease; Bike; Electroencephalogram (EEG); Cycling.

PAGES: 109
BIG AREA: Ciências Humanas
AREA: Psicologia
SUMMARY:

Bicycling has been proposed by several studies as a therapeutic procedure for patients with Parkinson Disease (PD), particularly to motor rehabilitation. The act of pedaling in these patients is related to an improvement of motor impairments, to reduction of tremors as well as in improvements in bradykinesia and cognition. The neurobiological mechanisms underlying these effects are little understood. It is known that pedaling suppress the beta-band activity (13-35Hz) in the cortex and subthalamic nuclei. It has been suggested that this effect is a consequence of activation cortical circuitry by sensorial proprioceptive feedback from the lower limbs while pedaling, which is a simpler movement than walking, since the pedal connect the two legs. It is also well known that visual stimulation modulates the neural activity by allowing the emergence of spontaneously cortical patterns. Objective: The main objective of this work was to study the neural activity of healthy volunteers through an electroencephalogram record while they pedal with and without visual temporary deprivation. Methods: Forty-two healthy undergraduate students (19 female) aged 18-28 years old participated of the study. In the experiment, the volunteers alternated between rest and pedaling phases on an ergometric horizontal bicycle in two different conditions: without (open eyes) and with visual deprivation (by wearing a blindfold). The pedaling movements were performed in two cadences, 40 and 80 rotations per minute. We recorded an electroencephalogram of the participants during the experiment and calculated the maximum power and maximum power frequency for the alpha (8-12Hz), low beta (13-22Hz) and high beta (23-35Hz) bands. Results and discussions: The movement of pedaling resulted in a lower maximum power of high beta activity when compared to resting. We found no effect of visual deprivation on max. power for beta bands. Thus, visual deprivation does not contribute to a lower neuronal recruitment beyond that resulting from pedaling. We also found no difference between the two cadences. These findings are similar to previous studies and support the relevance of pedaling as an therapeutic sport to people with PD. Regarding visual deprivation, we think that other studies should be done to better investigate the relationship between visual system and PD. Conclusions: High beta activity is suppressed by pedaling movement. This is one more research to clarify the effects of bicycling on the brain and the mechanisms underlying the therapeutically effect of pedaling in PD.

BANKING MEMBERS:
Externo à Instituição - ALEXANDRE HIDEKI OKANO - UFABC
Externo à Instituição - EDGARD MORYA
Presidente - 1216466 - JOHN FONTENELE ARAUJO