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Full-Text Articles in Medicine and Health Sciences
The Effects Of Glycerol Ingestion On Fluid Balance And Cardiovascular Hemodynamics In Males During Hypobaric Hypoxia, Julia Orri, Robert A. Robergs, Donna W. Lockner, David S. James, Ann L. Gibson, Erik Faria, Derek W. Marks, Heidi Weingart, Lance Dalleck
The Effects Of Glycerol Ingestion On Fluid Balance And Cardiovascular Hemodynamics In Males During Hypobaric Hypoxia, Julia Orri, Robert A. Robergs, Donna W. Lockner, David S. James, Ann L. Gibson, Erik Faria, Derek W. Marks, Heidi Weingart, Lance Dalleck
Kinesiology (Formerly Exercise and Sport Science)
Acute altitude exposure causes a loss of total body water and plasma volume. Glycerol ingestion has been shown to be rapidly absorbed by the intestine, leading to increases in serum osmolality, plasma osmolality, and total body water. The purpose of this study was to determine the effects of glycerol ingestion on fluid balance and cardiovascular hemodynamics at rest and during exercise during hypobaric hypoxia. Twelve men (33 ± 8 yr, 177 ± 3 cm, 75 ± 11 kg, 52 ± 10 ml O2 · kg-1 · min-1) each completed 4, 3.5 hr trials in a randomized design: (A) 6% carbohydrate/electrolyte …
Contrasting Roles Of Neural Firing Rate And Local Field Potentials In Human Memory, A. Ekstrom, Indre Viskontas, M. Kahana, J. Jacobs, K. Upchurch, S. Bookheimer, I. Fried
Contrasting Roles Of Neural Firing Rate And Local Field Potentials In Human Memory, A. Ekstrom, Indre Viskontas, M. Kahana, J. Jacobs, K. Upchurch, S. Bookheimer, I. Fried
Psychology
Recording the activity of neurons is a mainstay of animal memory research, while human recordings are generally limited to the activity of large ensembles of cells. The relationship between ensemble activity and neural firing rate during declarative memory processes, however, remains unclear. We recorded neurons and local field potentials (LFPs) simultaneously from the same sites in the human hippocampus and entorhinal cortex (ERC) in patients with implanted intracranial electrodes during a virtual taxi-driver task that also included a memory retrieval component. Neurons increased their firing rate in response to specific passengers or landmarks both during navigation and retrieval. Although we …