Movement Physiology
Mostrando 13-24 de 28 artigos, teses e dissertações.
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13. Efeitos da estimulação elétrica neuromuscular do quadríceps sobre as variáveis cardio-respiratórias em portadores de lesão medular / Responses cardio-respiratory to neuromuscular electrical stimulation of the quadriceps in patients with spinal cord injury
The objective of this research was to evaluate cardio-respiratory responses (heart rate, blood pressure, VO IND.2 , VCO IND.2 e Ve) to neuromuscular electrical stimulation (NMES) of the quadriceps in patients with spinal cord injury. Ten patients (five paraplegics and five tetraplegics) and one healthy subject participated in this study. The protocol of the
Publicado em: 2004
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14. Leaf-to-shoot apex movement of symplastic tracer is restricted coincident with flowering in Arabidopsis
Classical experiments in plant physiology showed that leaves are the source of signals that control the development of flowers from shoot meristems. Additional physiological and genetic experiments have indicated some of the molecules (e.g., gibberellins, cytokinins, and sucrose) that promote flowering in mustards including Arabidopsis. These small hydrophil
The National Academy of Sciences.
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15. pH gradients across phospholipid membranes caused by fast flip-flop of un-ionized fatty acids.
A central, unresolved question in cell physiology is how fatty acids move across cell membranes and whether protein(s) are required to facilitate transbilayer movement. We have developed a method for monitoring movement of fatty acids across protein-free model membranes (phospholipid bilayers). Pyranin, a water-soluble, pH-sensitive fluorescent molecule, was
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16. Steady-state force-velocity relation in the ATP-dependent sliding movement of myosin-coated beads on actin cables in vitro studied with a centrifuge microscope.
To eliminate the gap between the biochemistry of actomyosin in solution and the physiology of contracting muscle, we developed an in vitro force-movement assay system in which the steady-state force-velocity relation in the actin-myosin interaction can be studied. The assay system consists of the internodal cells of an alga, Nitellopsis obtusa, containing we
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17. Torsional conjugate eye movements induced by pupillary light stimulation
A patient with a brain-stem mass and some evidence of brain-stem dysfunction showed torsional conjugate eye movements after eyelid opening in an illuminated environment, also on pupillary light stimulation. The response appeared after a latency period of 1-2 s, and occurred on stimulation of either the right or left eye. The ocular torsion was always bilater
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18. Dynamics of coilin in Cajal bodies of the Xenopus germinal vesicle
Cajal bodies (CBs) are complex organelles found in the nuclei of a wide variety of organisms, including vertebrates, invertebrates, plants, and yeast. In most cell types CBs are <1 μm in diameter, severely limiting the range of experimental observations that can be made on them. By contrast, CBs in the amphibian oocyte nucleus (also called the germinal vesi
National Academy of Sciences.
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19. Coordinated clearance of periciliary liquid and mucus from airway surfaces.
Airway surface liquid is comprised of mucus and an underlying, watery periciliary liquid (PCL). In contrast to the well-described axial transport of mucus along airway surfaces via ciliary action, theoretical analyses predict that the PCL is nearly stationary. Conventional and confocal microscopy of fluorescent microspheres and photoactivated fluorescent dye
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20. Visualization of AqpZ-Mediated Water Permeability in Escherichia coli by Cryoelectron Microscopy
Transport of water across the plasma membrane is a fundamental process occurring in all living organisms. In bacteria, osmotic movement of water across the cytoplasmic membrane is needed to maintain cellular turgor; however, the molecular mechanisms of this process are poorly defined. Involvement of aquaporin water channels in bacterial water permeability wa
American Society for Microbiology.
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21. Aquaporins: translating bench research to human disease
There is considerable potential for translating knowledge of aquaporin structure, function and physiology to the clinic. One area is in aquaporin-based diagnostics. The discovery of AQP4 autoantibodies as a marker of the neuromyelitis optica form of multiple sclerosis has allowed precise diagnosis of this disease. Other aquaporin-based diagnostics are po
Company of Biologists.
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22. Membrane Repair Defects in Muscular Dystrophy Are Linked to Altered Interaction between MG53, Caveolin-3, and Dysferlin*◆
Defective membrane repair can contribute to the progression of muscular dystrophy. Although mutations in caveolin-3 (Cav3) and dysferlin are linked to muscular dystrophy in human patients, the molecular mechanism underlying the functional interplay between Cav3 and dysferlin in membrane repair of muscle physiology and disease has not been fully resolved. We
American Society for Biochemistry and Molecular Biology.
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23. Modeling facilitation and inhibition of competing motor programs in basal ganglia subthalamic nucleus–pallidal circuits
The motor symptoms of Parkinson's disease (PD) implicate the basal ganglia (BG) in some aspect of motor control, although the role the BG play in regulation of motor behavior is not completely understood. The modeling study presented here takes advantage of available cellular, systems, and clinical data on BG and PD to begin to build a biophysically based ne
National Academy of Sciences.
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24. Characterizing functional hippocampal pathways in a brain-based device as it solves a spatial memory task
Analyzing neural dynamics underlying complex behavior is a major challenge in systems neurobiology. To meet this challenge through computational neuroscience, we have constructed a brain-based device (Darwin X) that interacts with a real environment, and whose behavior is guided by a simulated nervous system incorporating detailed aspects of the anatomy and
National Academy of Sciences.