Accès ouvert
2025
article
OpenAlex
Nathan E. Johnson, Joel S. Burma, Matthew G. Neill, Joshua Burkart et autres
This investigation explored the impact of partial pressure of end-tidal carbon dioxide (P ET CO 2 ) alterations on temporal neurovascular coupling (NVC) responses across the cardiac cycle and the influence of biological sex via a complex visual scene-search task (“ Where’s …
ca
(code pays fourni par la source)
Accès ouvert
2025
article
OpenAlex
Joel S. Burma, Nathan E. Johnson, Ibukunoluwa K. Oni, Chantel Teresa Debert et autres
Abstract Objective. The current paper describes the creation of a simultaneous trimodal neuroimaging protocol. The authors detail their methodological design for a subsequent large-scale study, demonstrate the ability to obtain the expected physiologically induced responses across cerebrovascular domains, and describe the pitfalls …
ca, fr
(code pays fourni par la source)
Accès ouvert
2024
review
OpenAlex
Joel S. Burma, Damian Miles Bailey, Nathan E. Johnson, James K. Griffiths et autres
In this review, we have amalgamated the literature, taking a multimodal neuroimaging approach to quantify the relationship between neuronal firing and haemodynamics during a task paradigm (i.e., neurovascular coupling response), while considering confounding physiological influences. Original research articles that used concurrent neuronal …
ca, gb
(code pays fourni par la source)
Accès ouvert
2024
article
OpenAlex
Raelyn M. Javra, Joel S. Burma, Nathan E. Johnson, Jonathan D. Smirl
To examine the feasibility, utility and safety of superimposed lower body negative pressure (LBNP) and tilt during supine cycling in individuals suffering from persisting post-concussive symptoms (PPCS). Eleven individuals aged 17-31 (6 females/5 males) participated in two randomized separate visits, 1 week …
ca
(code pays fourni par la source)
2024
article
OpenAlex
Joshua Burkart, Nathan E. Johnson, Joel S. Burma, Matthew G. Neill et autres
Cerebral hemodynamics have been quantified during exercise via transcranial Doppler ultrasound, as it has high-sensitivity to movement artifacts and displays temporal superiority. Currently, limited research exists regarding how different exercise modalities and postural changes impact the cerebrovasculature across the cardiac cycle. Ten …
us, ca
(code pays fourni par la source)
Accès ouvert
2023
article
OpenAlex
Nathan E. Johnson, Joel S. Burma, Jina Seok, Lauren N. Miutz et autres
Abstract Objective. To evaluate sex differences in the reliability of absolute and relative cerebral blood velocity (CBv) during concurrent supine cycling with lower body negative pressure (LBNP). Approach . A total of 19 participants (11 females; aged 20–33 years) completed five testing …
ca, fr, us
(code pays fourni par la source)
2023
article
OpenAlex
Joel S. Burma, Selina Rattana, Nathan E. Johnson, Jonathan D. Smirl
Neurovascular coupling (NVC) studies commonly assess the mean cerebral hemodynamic response with little consideration for diastole, systole, and biological sex. Greater total activation expressed as the area under the curve was seen within systole compared with mean and diastole. Resting cerebral blood …
ca
(code pays fourni par la source)