Results 11 to 20 of about 17,476 (253)

Brain power comparison between microgravity and head-down tilt bed rest: an electroencephalography approach [PDF]

Scientific Reports
This study examines neurophysiological changes in microgravity by comparing EEG data from two ground analog 60-day head-down tilt bed rest (HDBR) experiments (ESA/DLR “Cocktail” and “RSL”) and the NEUROSPAT experiment in space.
María Sevilla-García, Adrián Quivira-Lopesino, Pablo Cuesta, Sandra Pusil, Ricardo Bruña, Patrique Fiedler, Fernando Maestu, Ana Maria Cebolla, Guy Cheron, Katharina Brauns, Alexander C. Stahn, Michael E. Funke   +11 more
doaj   +2 more sources

Effect of 60 days of head down tilt bed rest on amplitude and phase of rhythms in physiology and sleep in men [PDF]

npj Microgravity
Twenty-four-hour rhythms in physiology and behaviour are shaped by circadian clocks, environmental rhythms, and feedback of behavioural rhythms onto physiology.
María-Ángeles Bonmatí-Carrión, Nayantara Santhi, Giuseppe Atzori, Jeewaka Mendis, Sylwia Kaduk, Derk-Jan Dijk, Simon N. Archer   +6 more
doaj   +2 more sources

The drainage volume control by elevation of drainage height versus head down tilt in supine position for management of cerebrospinal fluid leakage following lumbar posterior surgery [PDF]

BMC Musculoskeletal Disorders
Objective To compare the clinical outcomes of control of drainage volume through either elevating the drainage height or tilting the head down in a supine position for the management of cerebrospinal fluid leakage (CSFL) following posterior lumbar ...
Ping Dong, Jing Huang, Xu Deng, Hongli Yang, Chunmei Luo   +4 more
doaj   +2 more sources

Daily artificial gravity partially mitigates vestibular processing changes associated with head-down tilt bedrest [PDF]

npj Microgravity
Microgravity alters vestibular signaling and reduces body loading, driving sensory reweighting. The unloading effects can be modelled using head-down tilt bedrest (HDT).
G. D. Tays, K. E. Hupfeld, H. R. McGregor, N. E. Beltran, Y. E. De Dios, E. Mulder, J. J. Bloomberg, A. P. Mulavara, S. J. Wood, R. D. Seidler   +9 more
doaj   +2 more sources

Is a Depth Camera in Agreement with an Electromagnetic Tracking Device when Measuring Head Position?

British and Irish Orthoptic Journal, 2021
Introduction: Clinicians typically observe and describe abnormal head postures (AHPs) and may also measure them. Depth cameras have been suggested as a reliable measurement device for measuring head position using face-tracking technology.
Vienna-Jaye Burchell, Gemma Arblaster, David Buckley, Jonathan Wheat   +3 more
doaj   +1 more source

The effects of Trendelenburg Position on Patient Care during Open Radical Prostatectomy: A Randomized Controlled Clinical Trial [PDF]

Journal of Evidence-Based Care, 2023
Background: Low quality of surgical field is a common problem during open radical prostatectomy (ORP). Aim: This study was performed aimed to survey the effects of Trendelenburg position on the quality of surgical field, mean arterial blood pressure ...
Behzad Imani, Hanieh Bahadori, Salman Khazaie, Mohammad Ali Amirzargar   +3 more
doaj   +1 more source

Gravitational Dose‐Response Curves for Acute Cardiovascular Hemodynamics and Autonomic Responses in a Tilt Paradigm

Journal of the American Heart Association: Cardiovascular and Cerebrovascular Disease, 2022
Background The cardiovascular system is strongly dependent on the gravitational environment. Gravitational changes cause mechanical fluid shifts and, in turn, autonomic effectors influence systemic circulation and cardiac control.
Richard S. Whittle, Nathan Keller, Eric A. Hall, Hrudayavani S. Vellore, Lindsay M. Stapleton, Katherine H. Findlay, Bonnie J. Dunbar, Ana Diaz‐Artiles   +7 more
doaj   +1 more source

Rat cardiovascular responses to whole body suspension: head-down and non-head-down tilt [PDF]

Journal of Applied Physiology, 1992
The rat whole body suspension technique mimics responses seen during exposure to microgravity and was evaluated as a model for cardiovascular responses with two series of experiments. In one series, changes were monitored in chronically catheterized rats during 7 days of head-down tilt (HDT) or non-head-down tilt (N-HDT) and after several hours of ...
X J, Musacchia, J M, Steffen, J, Dombrowski   +2 more
openaire   +2 more sources

Segmental volume changes that occur in nonhuman primates during short term head up (HUT) and head down (HDT) tilt

Journal of Electrical Bioimpedance, 2020
Nonhuman primates are often used in biomedical research and to investigate physiologic processes that occur in man. Impedance plethysmography was used to measure calf, thigh, pelvic, abdominal, and thoracic volume changes in ten Rhesus and eight squirrel
Montgomery Leslie David, Oloff Clarence
doaj   +1 more source

Noninvasive intracranial pressure real-time waveform analysis monitor during prostatectomy robotic surgery and Trendelenburg position: case report

Brazilian Journal of Anesthesiology, 2021
Both robotic surgery and head-down tilt increase intracranial pressure by impairing venous blood outflow. Prostatectomy is commonly performed in elderly patients, who are more likely to develop postoperative cognitive disorders.
Gabriela Tognini Saba, Vinicius Caldeira Quintão, Suely Pereira Zeferino, Claudia Marquez Simões, Rafael Ferreira Coelho, Arnaldo Fazoli, William Nahas, Gustavo Henrique Frigieri Vilela, Maria José Carvalho Carmona   +8 more
doaj   +1 more source