Download Animal Models of Drug Addiction by Styliani Vlachou, Athina Markou (auth.), Mary C. Olmstead PDF

By Styliani Vlachou, Athina Markou (auth.), Mary C. Olmstead (eds.)

Our knowing of dependancy and the way it really is taken care of has complicated remarkably during the last many years, and masses of the growth is said on to animal study. this can be actual for either the behavioural features of drug use in addition to the organic underpinnings of the sickness. In Animal versions of Drug dependancy, specialists within the box supply an up to date evaluation of advanced behavioural paradigms that version varied phases of this affliction and clarify how every one attempt is used to successfully mirror the development of drug habit. This distinctive and sensible ebook starts off with the most typical laboratory measures of dependancy in animals, together with intracranial self-stimulation (ICSS), drug self-administration, position conditioning, and sensitization. Later chapters describe how those paradigms are used to version the development of drug habit, supplying perception into the scientific symptomatology of habit from acquisition of drug use via compulsive drug taking to withdrawal and relapse. Written for the preferred Neuromethods sequence, the contributions provide either methodological aspect and a theoretical viewpoint, beautiful to readers conversant in preclinical study on drug dependancy in addition to people who are rookies to the sphere. state of the art and authoritative, Animal versions of Drug dependancy will function a foundation for destiny very important examine that hyperlinks the bench to the bedside within the an important therapy of drug addiction.

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Kelley and Hodge shed more light on the rewardfacilitating effects of cocaine by showing that these effects are mediated through 5-HT3 receptor activity (89). Other research groups demonstrated that other systems in the brain, such as hypocretin, g-aminobutyric acid, and cannabinoid, may also affect Fig. 3. (continued) pathways activated by ICSS, reflecting a reward-facilitating effect of these compounds. Administration of drugs that are highly rewarding to humans, such as cocaine, amphetamine, nicotine, ethanol, heroin, and phencyclidine, all lower ICSS thresholds, indicating a reward-facilitating effect.

4. Withdrawal from psychoactive drugs is associated with elevations in brain reward thresholds. Withdrawal from a wide range of psychoactive drugs induces robust deficits in brain reward function. These affective sequelae can be quantified with the ICSS procedure. When responding for ICSS from electrodes, anhedonia is operationally defined as elevations in ICSS thresholds (either current-intensity, frequency, or train-duration thresholds). Withdrawal from drugs that are rewarding to humans, such as psychostimulants (cocaine (a), amphetamine (b), and nicotine (c)), depressants (ethanol (d) and morphine (f)), and an NMDA receptor antagonist (phencyclidine (e)), all elevated reward thresholds.

6 g/kg ethanol increased the rate of lever-pressing but did not affect the threshold measure. 2 g/kg elevated thresholds without affecting response rates (272). 1 g/kg dose of ethanol administered intraperitoneally, unless the experimenter first applied the stimulation, in which case animals exhibited approximately the same response rates as in their drug-free state, despite the fact that the animals were debilitated after the ethanol administration. The lack of effect of ethanol on response rates for ICSS was considered to be attributable to either the strong resistance of the brain reward system to the depressive effects of ethanol or the fact that ethanol Intracranial Self-Stimulation 41 renders the brain reward system more responsive to natural rewards and emotional stimuli, such as food, sex, or even social and aggressive stimuli (273).

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