Using the conventional intracellu-lar recording techniques in the rat superior cervical ganglion, the effects of 9-amino-1,2,3,4-tetrahydroacridine(THA) on cholinergic transmission were studied. By superfusion of THA 0. 1~1 ?mol ?L-1(n = 26), the f-EPSPs evoked by preganglionic stimulation were facilitated, while 50~100 ?mol-L-1(n= 17) inhibited in a concentration-dependent manner, but 10 ?mol?L-1in 46% cells (n=11) increased and another 54% inhibited. Also exogenous ACh-induced potentials (n=27) were enhanced with THA 0. 1~10 ?mol?L-1, and in 60% (n=10) with 50~100 ?mol?L-1but another 40% depressed. In 7 cells, no enhancement of carbachol-inducedpotentials were found with THA 1~100 ?mol-L-1, while depression in 5 cells by 50~100 ?mol?L-1was observed. Pretreatment of atropine (1?mol?L-1) only partially eliminated THA inhibition on f-EPSPs but not ACh-or carbachol-induced potentials. It was suggested that THA facilitated cholinergic transmission by its anti-cholinesterase action and inhibited by both pre-and postsynaptic mechanism at different concentration levels.

AimTo realize the regulatory actions of nitric oxide(NO) on supraoptic nucleus (SON) neurons by observing the effects of NO donor sodium nitroprusside(SNP) on SON neurons. Methods The cell electrophysioloical properties were obtained by the intracellular recording techniques from the SON neurons in adult rat hypothalamic slices. Results In 11 silent cells, superfusion of SNP(1 mmol · L-1) for 3～5 min resulted in the depolarization response with a decrease of membrane resistance and time constant(P＜0.05) in 55% of cells, while hyperpolarization with an increase of membrane resistance in 45 % of neurons. In 73% of tested cells, SNP also decreased the amplitude, overshoot, firing frequency and slope of current-voltage curve, and increased the afterhyperpolarization of action potentials evoked by intracellular depolarizing current pulses(P ＜0.05).However, SNP enhanced the spontaneous firing in 67% of 6 tested cells with spontaneous activities. ConclusionSNP presents an inhibitory or excitatory effect on SON neurons in aneurontype-andfunctionalstate-dependent manner, which suggests that NO may exhibit adverse regulatory actions on SON neurons.

Aim To realize the modulatory actions of nitric oxide(NO) on supraoptic nucleus(SON)neurons by observing the effects of NO donor sodium nitroprusside(SNP) on the SON neurons. Methods The cell electrophysiology properties were obtained by the intracellular recording techniques from the SON neurons in adult rat hypothalamic slices. Results Local pressure ejection of glutamate induced depolarizing responses with decrease of input resistance, concentration- and membrane potential-dependent properties in 12 SON neurons. The amplitude and duration of glutamate responses were suppressed by bath of SNP in 67% of tested cells(P

Neurobiology,one of the important subject in life science frontier,comprises extensive and comprehensive contents.It is significant and essential for each discipline of medicine to offer this course.During last several years of teaching and practice,some methods,skills and ideas have been utilized and summarized.Modem medical education,by offering this course,will accord with the development concept of the transition from biomedicine to bio-psycho-social medical model,and this course will provide the substantial foundation for cultivating qualified medical students.

Objective To study the cellular and molecular modulation mechanisms of norepinephrine (NE) release in hypothalamus induced by electrical stimulation in locus coeruleus (LC) in the rat model of depression-like behavior.Methods The depression-like behavior model was established by combining separation and chronic unpredictable stress stimulations.After the model establishment,behavior tests were used to verify the success of modeling.NE release in the hypothalamus induced by electrical stimulation in LC was studied in real time and NE signal was recorded with carbon fiber electrode.The peak value,the time to peak and half-life period of NE signal in both group rats were measured and analysed.Results The bodyweight,score of open-field test,percentage of sucrose preference of model group rats ((263.9± 16.4) g,(19.4±7.9),(44.3± 10.8) ％) were significantly lower than those((314.3±24.3) g,(53.3± 19.0),(60.6± 13.3) ％) of control group(P＜0.01).The peak value of NE signal in the hypothalamus induced by electrical stimulation in locus coeruleus in depression-like behavior model rats((176.9±50.4) pA)was less than that((361.6±88.6) pA)in control group(P＜0.01),and the time to peak of NE signal was also shortened in depression-like behavior model group rats (P＜0.05).Intraperitoneal injection of yohimbine (3 mg/kg) potentiated electrical stimulation induced NE release in depression-like behavior model rats but not in control group.Conclusion The chronic unpredictable stresses attenuate the secretion of NE in the hypothalamus induced by electrical stimulation in LC in rats.Yohimbine,a presynaptic α2 receptor antagonist,increased NE release in hypothalamus in depression-like behavior model rats.These findings suggest that the LC projects functionally to the hypothalamus and the projection may contribute to the pathogenesis of depression.

Objective To explore the reliability and validity of Meadow-Kendall Social-Emotional Assessment Inventory (SEAI) for Deaf and Hearing-Impaired Students Preschool Version in China. Methods 96 hearing-impaired children were assessed with SEAI, and 30 of them were assessed with Conners Teacher Rating Scale (TRS), 30 by another teacher, 30 by the first teacher 2 weeks later. The data were analyzed with Pearson's or Spearman's correlation analysis. Results For sociable communicative behaviors, impulsive dominating behaviors, developmental lags, anxious compulsive behaviors, items related to deafness, test-retest reliability (correlated coefficient, r) was 0.94,0.55, 0.87, 0.31, 0.74; and Cronbach's α was 0.70, 0.76, 0.76, 0.80, 0.68. The inter-rater reliability was 0.90, 0.58, 0.46, 0.14, 0.55. The subscales of SEAI were correlated (r=-0.36~-0.89, P<0.05) with the subscales of TRS. Confirmatory factor analysis showed that the subscale model of SEAI was reasonable. Conclusion The SEAI for Deaf and Hearing-impaired Students Preschool Version can be used for Chinese hearing-impaired children.

Objective To understand the status and the influencing factors of urban and rural elderly housebound in western region of China. Methods Two urban communities and two towns were selected from Chengdu and Lanzhou. A total of 2 584 elderly meeting the conditions were selected for investigation (including demographic data, living habits, physical condition, environmental, psychological, social status, housebound state rating scale, etc.) by method of going to home one by one. Results The incidence of community elderly housebound was 18.85% (487/2 584) in the western region. Multivariate regression analysis showed that other occupation (farmers, self-employed, free occupation, no industry etc.), no drinking, no exercise, no communication with neighbors, poor daily activities were the main factors affecting the occurrence of housebound. Conclusions The western region of community elderly housebound is higher, we should take appropriate measures to prevent the occurrence and deterioration of housebound.

AIM: To investigate the effects of psychological stress on ulcerative colitis rats and to explore the mechanisms of this;meanwhile to investigate the effects of anxiolytic drug on symptoms of ulcerative colitis rats under psychological stress and the mechanisms of it.METHODS: eighty male Wistar rats were randomly divided into four groups(n=20): UC control group;UC stress group;UC+clonazepam group;UC stess+clonazepam group.After UC model was established with immunization,these rats were fightened by cat to set up psychological stress model.During establishing stress model,each groups were respectively received physiologic saline or clonazepam by intragastric administration.After 15d treatment,all rats were sacrified simultaneously.Colon mucosal inflammationand damage were assessed by measuring colon mass,morphologic damage score,colonic MPO and NO activity levels.Morphologic damage score was examined under microscope.Colonic MPO and NO was measured by spectrophotometric method.Serum hydrocortisone was determined by radioimmunoassay(RIA).RESULTS: Morphologic damage score,colonic MPO and NO,serum hydrocortisone of UC stress group were significantly increased compared with those of UC control group;morphologic damage score,colonic MPO and NO,serum hydrocortisone of UC+clonazepam group were decreased markedly vs UC stress group;Little difference was observed between UC+clonazepam group and UC control group.CONCLUSION: Psychological stress can aggravate symptoms of UC.Although benzodiazepine have no anti-inflammatory action,it relieve effects on internal organs of psychological stress and aggravation of symptoms of UC by to effect limbic system and formatio reticularis.

Objective To explore the social-emotional competence of hearing-impaired children and its related factors. Methods A questionnaire was used to investigate the social-emotional competence, hearing status, temperament and parenting style of 68 hearing-impaired children. Results and Conclusion The social-emotional problems of hearing-impaired children were prominent, especially in the dimension of externalizing behavior (13.23%) and competence (10.29%). The girls had more implicit behavior problems than the boys (P<0.05). Aided thresholds, children's temperament and parenting style had significant influence on social-emotional competence of hearing-impaired children (P<0.05).

Objective To explore the effect of rehabilitation training on self-care ability of patients with senile dementia. Methods One hundred and one senile dementia patients were divided into two groups with 53 cases in experimental group receiving targeted rehabilitation training besides routine nursing and 48 in control group only receiving routine nursing.Self-care ability of patients in the two groups was comparatively evaluated according to the activity of daily living scale (ADL).Result The ADL score and the total score of the experimental group were both higher than those of the control group (P<0.05).Conclusion Rehabilitation training according to the specific conditions of patients with senile dementia can improve their self-care ability in adapting to the society, delaying the progress of the disease and improving the quality of life.