By S. Hurit. Auburn University. 2018.
The role of the amygdala in system responsible for fear 5 mg compazine with amex. Psychonom Bull Rev 1994;1: the expression of psychic phenomena in temporal lobe seizures buy cheap compazine 5 mg. The excitatory effects of the amygdala North Holland, 1981:489–507. Psychol Bull 1964; diated by hypothalamic norepinephrine, serotonin, and CRF- 62:89–109. Different regions of the periaqueductal grey are in- amygdala in the coordination of behavioral, neuroendocrine, volved differently in the expression and conditioned inhibition and prefrontal cortical monoamine responses to psychological of fear-potentiated startle. Dissociable effects of selective lesions is involved in the sensitization of the acoustic startle response to hippocampal subsytems on exploratory behavior, contextual in rats. Partial anxiolytic actions of morphine sul- 487–493. Bilateral lesions of the amygdala attenuate Res 1993;58:123–131. Role of amygdaloid nuclei in the anxiolytic Res 1994;648:215–221. The effects of neurotoxic related responses in the rat. An infusion of bupivacaine 948 Neuropsychopharmacology: The Fifth Generation of Progress into the nucleus accumbens disrupts the acquisition but not the 129. Postsynaptic induction and PKA- expression of contextual fear conditioning. Behav Neurosci 1999; dependent expression of LTP in the lateral amygdala. Medial amygdala enhances rats: reinstatement of conditioned performance by noxious stim- synaptic transmission and synaptic plasticity in the dentate gyrus ulation on test. Attenuated hippocampal long-term mediates context-specific extinction of learned fear. Psychophar- potentiation in basolateral amygdala-lesioned rats. Amygdala N-methyl-D-aspartate not impair pavlovian fear conditioning but regulates when and receptors participate in the induction of long-term potentiation where fear is expressed. J Exp Psychol Anim Behav Process 1999; in the dentate gyrus in vivo. Neurotoxic lesions of basolateral amygdala facilitates the induction of long-term po- basolateral, but not central, amygdala interfere with pavlovian tentiation in the dentate gyrus in vivo. Neurosci Res 1995;22: second-order conditioning and reinforcer devaluation effects. Norepinephrine infused into the ba- neuron activity for the induction of long-term potentiation in solateral amygdala posttraining enhances retention in the spatial the dentate gyrus in vivo. Anxiolytic-like action of vation detected with echo-planar functional magnetic resonance neuropeptide Y: mediation by Y1 receptors in amygdala, and imaging. Intrinsic neurons in sive consequences of morphine withdrawal. Behav Pharmacol the amygdala field projected to by the medial geniculate body 1995;6:74–80. Disorders of facial recognition, social behaviour and rats via direct neurotropic action. Neural encoding of individual tractotomy: a clinical and experimental study. Psychol Med words and faces by the human hippocampus and amygdala. The amygdala is essential for the expression of nucleus lesions: effect on heart rate conditioning in the rabbit. Effects of electrical stimula- performance of conditional fear. Physiol Behav 1992;51: tion of the amygdaloid central nucleus on neocortical arousal 1271–1276. Stress-induced hypoalgesia and defensive freez- 141. Amygdaloid contribu- ing are attenuated by application of diazepam to the amygdala. Antinociception emotion, memory and mental dysfunction.
Note that although amiodarone and sotalol are evaluated under this KQ for their rate-controlling potential generic 5 mg compazine, these agents are also potent membrane-active purchase compazine 5mg without prescription, type III antiarrhythmics, thereby having potential rhythm-control benefits (and risks). The primary outcome reported for this KQ, assessed in all but one study, was control of ventricular rate. Table A summarizes the strength of evidence for the most commonly used classes of therapies and evaluated outcomes. Details about the specific components of these ratings (risk of bias, consistency, directness, and precision) are available in the full report. For ventricular rate control, most comparisons were evaluated in one small study, resulting in insufficient evidence to support conclusions about comparative effectiveness. There was low strength of evidence that amiodarone was comparable to the calcium channel blocker diltiazem and that amiodarone controlled ventricular rate better than digoxin, and there was high strength of evidence for a consistent benefit of verapamil or diltiazem compared with digoxin for rate control. There was insufficient evidence regarding the effect of rate-control therapies on quality of life. Summary of strength of evidence and effect estimate for KQ 1 Treatment Comparison Ventricular Rate Control Quality of Life Beta blockers vs. Calcium channel blockers plus SOE = Insufficient (1 study, 52 SOE = Insufficient (no studies) digoxin vs. Note: KQ = Key Question; SOE = strength of evidence. Strict Versus Lenient Rate-Control Strategies Key points from the Results chapter in the full report are as follows. This decrease was statistically significant in the RCT but not in the observational study. Three studies—one RCT and two observational studies representing secondary analyses of RCTs—were included in our analyses. We also included data from a separately published subgroup analysis of the one RCT directly included in our analysis. Of the included studies, two were of good quality and one was of fair quality. The number of patients included in studies ranged from 214 to 1,091, with some overlap in patient populations across studies. A total of approximately 1,705 unique patients were included. Rate control was deemed “strict” for 1,177 and deemed “lenient” for 528. Included studies used varying definitions of “strict” and “lenient” rate control. The single included RCT used a resting heart rate <80 bpm as the definition of strict rate control and a resting heart rate <110 bpm as the definition of lenient rate control. One observational study compared patients ES-12 from the rate-control arms of two prior RCTs; the RCT that used a resting rate-control goal of <80 bpm was deemed “strict,” and the RCT that used a resting rate-control goal of <100 bpm was deemed “lenient. Table B summarizes the strength of evidence for strict versus lenient rate control and the outcomes of interest. Details about the specific components of these ratings (risk of bias, consistency, directness, and precision) are available in the full report. Across outcomes, data were limited by the number of studies and the imprecision of their findings. We based our findings on the evidence from the one RCT and then evaluated whether the observational studies were consistent with these findings or not. In general, the included studies were consistent in showing no significant difference between strict and lenient rate control with respect to mortality, cardiovascular hospitalizations, heart failure symptoms, quality of life, thromboembolic events, bleeding events, and composite outcomes. However, the RCT differed from the observational studies in showing a statistically significantly lower stroke rate with lenient rate control. Summary of strength of evidence and effect estimate for KQ 2 Outcome Strength of Evidence and Effect Estimate All-cause mortality SOE = Insufficient (1 study, 614 patients) CV mortality SOE = Insufficient (2 studies, 828 patients) CV hospitalizations SOE = Insufficient (2 studies, 1,705 patients) Heart failure symptoms SOE = Insufficient (2 studies, 828 patients) Quality of life SOE = Insufficient (2 studies, 828 patients) Thromboembolic events SOE = Low (2 studies, 828 patients) The HR was 0. Bleeding events SOE = Insufficient (2 studies, 828 patients) Note: CI = confidence interval; CV = cardiovascular; HR = hazard ratio; KQ = Key Question; RCT = randomized controlled trial; SOE = strength of evidence. Rate-Control Procedures Versus Drugs or Versus Other Procedures in Patients for Whom Initial Pharmacotherapy Was Ineffective Key points from the Results chapter of the full report are as follows. Procedures versus drugs: • Based on three studies (one good, two poor quality) involving 175 patients, patients undergoing a procedural intervention had a significantly lower heart rate at 12 months than those receiving a primarily pharmacological intervention (moderate strength of evidence). ES-13 • There was insufficient strength of evidence to support findings for other outcomes, including quality of life. One procedure versus another: • Based on one study (fair quality) involving 40 patients, there was no difference in ventricular rate control between those assigned to an anterior versus posterior ablation approach (low strength of evidence). Six RCTs (two good, three fair, and one poor quality) involving a total of 537 patients met the inclusion criteria for KQ 3, evaluating the comparative effectiveness of a procedural intervention versus a primarily pharmacological intervention for rate control of AF or comparing two primarily procedural interventions. We also included data from a separately published subgroup analysis of one of the RCTs. One study each was based in the United Kingdom, continental Europe, and Asia; one was a multicenter trial based in Australia; one was a multicenter trial in the United States and Canada; and one did not specify the geographical location. All studies were unblinded due to the nature of the interventions.
The sion can persist for weeks—even after drug use has been induction of multiple transcription factors by this mecha- discontinued compazine 5 mg for sale. The biological significance of FosB induc- nism has already been described purchase compazine 5 mg overnight delivery. Other psychostimulant tion will be better understood following identification of the induced IEG products that have been described in the stria- genes that it regulates. Certain AMPA glutamate receptor tum include homer-1a, narp, arc, and many others (62,74, subunit-encoding genes are among the candidates. Some of the genes induced by dopamine and psycho- though FosB is stable, it is ultimately degraded; thus, by stimulants in the striatum have been hypothesized to play Chapter 96: Molecular and Cellular Biology of Addiction 1377 a role in hippocampal LTP, making it tempting to speculate only a few situations, such as somatic dependence on op- that they may ultimately have a role in synaptic remodeling iates. Even for more difficult problems, however, powerful in the striatum (76–79). Indeed, D1 receptors have been tools are on the horizon. It is imperative, for example, to shown to be required for normal hippocampal long-term investigate the mechanisms by which dopamine excess potentiation (LTP), an important model of synaptic plastic- might produce long-lived pathological associative memories ity. For LTP in the CA1 region of the hippocampus to that could underlie compulsive drug use and late relapse. The requirement for activation of gene these reagents, we will be limited only by our neurobiologi- expression seems to be transient, because blockers of tran- cal imaginations. Activators of the cAMP cascade, REFERENCES including D1 agonists, can induce L-LTP (84,85). D1 re- ceptor blockade inhibits hippocampal L-LTP (85–87), and 1. The biological, social D1-knockout mice do not show L-LTP (88). Therefore, and clinical bases of drug addiction: commentary and debate. D1 receptor activation in the hippocampus may act to gate 2. Drugs abused by humans preferentially synaptic plasticity, helping to determine whether changes increase synaptic dopamine concentrations in the mesolimbic in synaptic strength are long lasting or merely transient. Proc Natl Acad Sci USA 1988;85: A role for dopamine receptors in the modification of 5274–5278. MK-801 (dizocilpine): synergist and conditioned stimulus in bromocriptine-induced extracellular dopamine can act as a reinforcement learning psychomotor sensitization. From synapse to vesicle: the reuptake and depression)is found at corticostriatal synapses in vivo (90) storage of biogenic amine neurotransmitters. Some groups have found that striatal Acta 1993;1144:249–263. Hyperlocomotion and indiffer- LTP can be modified by dopamine receptor stimulation ence to cocaine and amphetamine in mice lacking the dopamine (91,93,94). Moreover, based on genetic manipulations, transporter. CREB has been implicated in both invertebrate and verte- 6. Altered brain serotonin brate models of synaptic plasticity and long-term memory homeostasis and locomotor insensitivity to 3,4-methylenedioxy- (80–82,95). Moreover, changes in striatal synaptic physiol- methamphetamine ('Ecstasy')in serotonin transporter-deficient mice. At the systems level, dorsal re- norepinephrine transporter are supersensitive to psychostimu- gions of striatum appear to be involved in the learning and lants. Cocaine self- particularly in response to external cues. Ventral striatal administration in dopamine-transporter knockout mice [see com- ments] [published erratum appears in Nat Neurosci 1998;1(4): areas are involved in acting on the motivational significance 330]. Opioids excite dopamine neurons by regions may contribute to drug use through consolidation hyperpolarization of local interneurons. J Neurosci 1992;12: of drug-taking and -seeking behaviors. Destruction of dopa- mine in the nucleus accumbens selectively attenuates cocaine but of genes transiently induced by addictive drugs, the products not heroin self-administration in rats. Psychopharmacology (Berl) of which produce stable remodeling of synapses. Heroin and cocaine intravenous self-administration in rats: mediation by separate CONCLUSION neural systems. Disruption of cocaine and heroin self-administration following kainic acid lesions of All of the initial molecular targets of drugs of abuse have the nucleus accumbens. Pharmacol Biochem Behav 1985;23: been characterized and cloned.
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