4 documents found, page 1 of 1
Sympathetic cutaneous vasomotor alerting responses (SCVARs) are associated with...
Menezes, Rodrigo Cunha Alvim de; Ootsuka, Youichirou; Blessing, William W.Alerting stimuli that cause sympathetic cutaneous vasomotor alerting responses (“SCVARs”) in the thermoregulatory vascular bed of the rabbit ear pinna also induce theta (5–8 Hz) rhythm in the hippocampal EEG, a marker that the animal is engaged with the environment. The present study determines the relation between SCVARs in the thermoregulatory tail artery vascular bed and hippocampal EEG theta rhythm in Sprag...
Inactivation of neuronal function in the amygdaloid region reduces tail artery ...
Mohammed, M.; Kulasekara, Keerthi; Menezes, Rodrigo Cunha Alvim de; Ootsuka, Youichirou; Blessing, William W.Few studies have investigated whether neuronal function in the amygdaloid complex is necessary for the occurrence of the cardiovascular response to natural (unconditioned) environmental threats. In the present investigation in conscious unrestrained Sprague–Dawley rats we inactivated neuronal function in the amygdaloid complex acutely (bilateral muscimol injections) or chronically (unilateral or bilateral ibote...
Brown adipose tissue thermogenesis precedes food intake in genetically obese Zu...
Kontos, Anna; Menezes, Rodrigo Cunha Alvim de; Ootsuka, Youichirou; Blessing, William W.In Sprague–Dawley rats, brown adipose tissue (BAT) thermogenesis occurs in an episodic ultradianmanner (BAT on-periods) as part of the basic rest–activity cycle (BRAC). Eating occurs approximately 15 min after the onset of BAT on-periods. Zucker obese (fa/fa) rats eat larger less frequent meals than control rats. In chronically instrumented conscious unrestrained Zucker obese rats we examined ultradian fluctuat...
Brown adipose tissue thermogenesis heats brain and body as part of the brain-co...
Ootsuka, Youichirou; Menezes, Rodrigo Cunha Alvim de; Zaretsky, Dmitry V.; Alimoradian, A.; Hunt, J.; Stefanidis, A.; Oldfield, B. J.Brown adipose tissue (BAT), body and brain temperatures, as well as behavioral activity, arterial pressure and heart rate, increase episodically during the waking (dark) phase of the circadian cycle in rats. Phase-linking of combinations of these ultradian (<24 h) events has previously been noted, but no synthesis of their overall interrelationships has emerged. We hypothesized that they are coordinated by brai...