Magdalena Kendall

Learn More
Endogenously generated circadian rhythms are synchronized with the environment through phase-resetting actions of light. Starlight and dim moonlight are of insufficient intensity to reset the phase of the clock directly, but recent studies have indicated that dim nocturnal illumination may otherwise substantially alter entrainment to bright lighting(More)
We investigated the influence of sympathetic nervous system processes on mucosal immunity by comparing the effects of beta-adrenoceptor blockade with 40 mg propranolol and placebo on secretory immunoglobulin A (sIgA) at rest and during paced serial arithmetic, cold pressor, and submaximal cycling. These tasks produced patterns of cardiovascular activity(More)
Subarachnoid hemorrhage (SAH) was induced in 50 rabbits by injecting 1.25 cc/kg of autologous, well heparinized, fresh arterial blood into the cisterna magna, followed by suspending the animals in a head-down position at 30 degrees for 15 minutes. The animals were evenly divided into five groups: a control group, or groups receiving post-SAH prostacyclin(More)
The mechanism underlying acute changes in secretory immunoglobulin A (sIgA) remains to be determined. In this experiment, sIgA and cardiovascular activity were monitored at rest and while participants performed a mental arithmetic task, cold pressor, and submaximal cycle exercise following placebo or 1 mg of the alpha-adrenergic blocker, doxazosin. Under(More)
Transcranial brain stimulation by either electrical or noninvasive magnetic stimulation has produced motor responses of limb musculature. However, recordings from muscles innervated by cranial nerves have not previously been reported. A right-sided craniotomy was performed in 18 dogs. An electric stimulus was delivered to the motor cortex via surface(More)
Motor responses of limb musculature have been elicited by transcranial brain stimulation using electrical and magnetic stimulation. Recording from muscles innervated by cranial nerves has not previously been reported. A unilateral hemispheric craniotomy was performed in 24 dogs. An electric stimulus was delivered directly to the exposed motor cortex via(More)
  • 1