Harold J . Bell and James Duffin suppressed by a cognitive task Respiratory response to passive limb movement is
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Respiratory response to passive limb movement is suppressed by a cognitive task.
Feedback from muscles stimulates ventilation at the onset of passive movement. We hypothesized that central neural activity via a cognitive task source would interact with afferent feedback, and we tested this hypothesis by examining the fast changes in ventilation at the transition from rest to passive leg movement, under two conditions: 1) no task and 2) solving a computer-based puzzle. Resti...
متن کاملCO2 does not affect passive exercise ventilatory decline.
Breathing increases abruptly at the start of passive exercise, stimulated by afferent feedback from the moving limbs, and declines toward a steady-state hyperpnea as exercise continues. This decline has been attributed to decreased arterial CO2 levels and adaptation in afferent feedback; however, the relative importance of these two mechanisms is unknown. To address this issue, we compared vent...
متن کاملMorphine sensitization and state-dependent learning in mice
In the present study, the effects of morphine sensitization on morphine-induced impairment of memory formation and the state-dependent retrieval of a passive avoidance task learned under morphine influence have been investigated in mice. Pre-training administration of morphine (0.5, 2.5 and 5 mg/kg) dose dependently suppressed the learning of one-trial passive avoidance task. Pre-test administr...
متن کاملMorphine sensitization and state-dependent learning in mice
In the present study, the effects of morphine sensitization on morphine-induced impairment of memory formation and the state-dependent retrieval of a passive avoidance task learned under morphine influence have been investigated in mice. Pre-training administration of morphine (0.5, 2.5 and 5 mg/kg) dose dependently suppressed the learning of one-trial passive avoidance task. Pre-test administr...
متن کاملAREGU January 47/1
Stephenson, Richard, Ravi M. Mohan, James Duffin, and Tim M. Jarsky. Circadian rhythms in the chemoreflex control of breathing. Am. J. Physiol. Regulatory Integrative Comp. Physiol. 278: R282–R286, 2000.—Mechanisms underlying the circadian rhythm in lung ventilation were investigated. Ten healthy male subjects were studied for 36 h using a constant routine protocol to minimize potentially confo...
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تاریخ انتشار 2004