Spinal reflex action

The inhibitory control of spinal reflex action.

Hypnic Reflex: A Spinal Perspective

Hypnic jerks are spontaneous sudden jerking movements most often occurring just prior to falling asleep [1]. They are considered non-periodic and myoclonic in behaviour and are similar to fasciculation with polysomnography. They are more probable with fatigue and sleep deprivation [2,3]. These sudden movements are common but to date still not well understood. Approximately seventy percent of th...

Mental simulation of an action modulates the excitability of spinal reflex pathways in man.

The question of whether mental simulation of an action has an effect on the spinal reflex circuits was examined in normal humans. Subjects were instructed either to exert or to mentally simulate a strong or a weak pressure on a pedal with the left or the right foot. Changes in the H- and T-reflexes activated by electrical and mechanical stimuli were measured on both legs during motor performanc...

Action of naftopidil on spinal serotonergic neurotransmission for inhibition of the micturition reflex in rats.

AIMS We examined the mechanism of action of naftopidil, an α1D/A blocker, on spinal descending serotonergic neurotransmission for the micturition reflex. METHODS We examined (1) urinary 5-hydroxyindole acetic acid (5-HIAA) after intraperitoneal administration of saline, para-chlorophenylalanine (PCPA; a serotonin synthetic enzyme inhibitor), and/or 5-hydroxytryptophan (5-HTP; a serotonin prec...

Propranolol but not Naloxone Enhances Spinal Reflex

Marc J. Rogers, Zhiying Xiao, Bing Shen, Jicheng Wang, Zeyad Schwen, 3 James R. Roppolo, William C. de Groat, Changfeng Tai 4 5 6 Department of Urology, University of Pittsburgh, Pittsburgh, PA, USA, 15213 7 Department of Urology, The Second Hospital, Shandong University, Jinan, P.R. China 8 Department of Pharmacology and Chemical Biology, University of Pittsburgh, Pittsburgh, PA, 9 USA, 15213 ...