Vol 9: Prefrontal Cortex Haemodynamics and Affective Responses during Exercise: A Multi-Channel Near Infrared Spectroscopy Study.Reportar como inadecuado



 Vol 9: Prefrontal Cortex Haemodynamics and Affective Responses during Exercise: A Multi-Channel Near Infrared Spectroscopy Study.


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This article is from PLoS ONE, volume 9.AbstractThe dose-response effects of the intensity of exercise upon the potential regulation through top-down processes of affective pleasure-displeasure responses in the prefrontal cortex during an incremental exercise protocol have not been explored. This study examined the functional capacity of the prefrontal cortex reflected by haemodynamics using near infrared spectroscopy and affective responses during exercise at different intensities. Participants completed an incremental cycling exercise test to exhaustion. Changes Δ in oxygenation O2Hb, deoxygenation HHb, blood volume tHb and haemoglobin difference HbDiff were measured from bilateral dorsal and ventral prefrontal areas. Affective responses were measured every minute during exercise. Data were extracted at intensities standardised to: below ventilatory threshold, at ventilatory threshold, respiratory compensation point and the end of exercise. During exercise at intensities from ventilatory threshold to respiratory compensation point, ΔO2Hb, ΔHbDiff and ΔtHb were greater in mostly ventral than dorsal regions. From the respiratory compensation point to the end of exercise, ΔO2Hb remained stable and ΔHbDiff declined in dorsal regions. As the intensity increased above the ventilatory threshold, inverse associations between affective responses and oxygenation in a all regions of the left hemisphere and b lateral dorsal and ventral regions followed by the midline ventral region in the right hemisphere were observed. Differential activation patterns occur within the prefrontal cortex and are associated with affective responses during cycling exercise.



Autor: Tempest, Gavin D.; Eston, Roger G.; Parfitt, Gaynor

Fuente: https://archive.org/







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