Monthly Archives: July 2015

Increasing gravity reveals the mechanism of human tremor

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Everyone experiences some degree of involuntary motion when trying to keep their hand still. Known as physiological tremor, the underlying mechanisms have been debated for over a century. Two explanations, neural and mechanical, are generally offered. The neural theory suggests that involuntary movements directly reflect oscillations in the control signal […]

Breathing: a constant requirement, but is respiratory muscle activation adaptable?

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Over 15 000 times every day we draw air into the lungs by expansion of the chest wall and abdomen; we breathe. This movement occurs by activation of inspiratory muscles from electrical signals from the brain to the respiratory motoneurones in the spinal cord. There are many inspiratory muscles that can […]