Jun Mei

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Our previous study shows that intracerebroventricularly (i.c.v.) injected norepinephrine (NE) had different effects on the discharge of different firing patterns of magnocellular neurons in the paraventricular nucleus (PVN). In the present study we further classified antidromically identified magnocellular neurons into two groups: vasopressin (VP) and(More)
AIM To investigate the primary electrophysiological and pharmacological properties of the nucleus basalis magnocellularis (nbM) neurons. METHODS Single unit extracellular recordings from the nbM neurons were obtained with glass micropipettes in urethane-anesthetized rats. RESULTS Most nbM neurons responded to noxious but not innocuous mechanical,(More)
  • Y P Ji, J Mei
  • 2000
The effects of intracerebralventricular (icv) injection of nitric oxide (NO) donor and nitric oxide synthase (NOS) inhibitor on the spontaneous discharge of magnocellular neurons of paraventricular nucleus (PVN) of hypothalamus were investigated in urethane anaesthetized adult SD rats by using microelectrode extracellularly recording method. The results(More)
The present study investigated the behavioral training-induced c-Fos expression in the nucleus basalis of Meynert (nbM) in differently aged rats. This study demonstrated that the c-Fos expression in nbM was significantly increased and the peak occurred at 2 h after dark-avoidance training. Although the increase of c-Fos expression was also observed after(More)
The present study investigated the effects of peripheral noxious stimuli on the spontaneous activity of the nucleus basalis magnocellularis (nbM) neurons in young, adult and old rats. Single unit extracellular recordings from the nbM neurons were obtained with glass micropipettes in urethane-anesthetized rats. A total of 104 units were antidromically(More)
  • S G Lu, J Mei
  • 1992
The inhibitory effects of dopamine (DA) applied spinally on the wide dynamic range (WDR) neurons of dorsal horn in rats were studied with extracellular recording technique. 54 WDR units were tested from 43 rats. With a dosage of DA from 0.26 x 10(-6) to 1.58 x 10(-6) mol/kg, the inhibitory effect of the neurotransmitter on the responses of dorsal horn(More)
We propose a simple two-dimensional acoustic crystal to realize topologically protected edge states for acoustic waves. The acoustic crystal is composed of a triangular array of core-shell cylinders embedded in a water host. By utilizing the point group symmetry of two doubly degenerate eigenstates at the Γ point, we can construct pseudo-time-reversal(More)
The present study investigated the age-related alterations in responses of the nucleus basalis magnocellularis (nbM) neurons to frontal cortex (FCX) stimulation. Single unit extracellular recording from the nbM neurons were obtained with glass micropipettes in urethane-anesthetized rats. A total of 137 units were located within the nbM in the three age(More)
The present study investigated the effects of intracerebroventricular (i.c.v.) injection of acetylcholine (Ach), atropine and tubocurarine on the spontaneous activity of nucleus basalis Magnocellularis (nbM) neurons in young, adult and old rats. I.c.v. injection of Ach (1, 10 and 100 mM) dose-dependently increased the spontaneous firing rate in most of the(More)
  • P Tao, J Mei
  • 1996
Extracellular recordings were made from 176 spontaneous discharging units in the arcuate nucleus of rat hypothalamic slices. Depending on the patterns of discharge, the units were divided into three types; slow irregular (76%), fast continuous (26.5%) and phasic units (6.3%). The effect of 5-HT on the different types of units were observed. The results(More)