Individual responses to novelty predict qualitative differences in d-amphetamine-induced open field but not reward-related behaviors in rats
Φόρτωση...
Ημερομηνία
Συγγραφείς
Antoniou, K.
Papathanasiou, G.
Panagis, G.
Nomikos, G. G.
Hyphantis, T.
Papadopoulou-Daifoti, Z.
Τίτλος Εφημερίδας
Περιοδικό ISSN
Τίτλος τόμου
Εκδότης
Περίληψη
Τύπος
Είδος δημοσίευσης σε συνέδριο
Είδος περιοδικού
peer-reviewed
Είδος εκπαιδευτικού υλικού
Όνομα συνεδρίου
Όνομα περιοδικού
Neuroscience
Όνομα βιβλίου
Σειρά βιβλίου
Έκδοση βιβλίου
Συμπληρωματικός/δευτερεύων τίτλος
Περιγραφή
Differences in the locomotor response of rats to a novel environment (high responders [HR] versus low responders [LR]) have been associated with differences in vulnerability to psychostimulants. In the present study we profiled extensively the behavioral repertoire of HR and LR rats (differentiated on the basis of vertical activity) during exposure to a novel environment and in response to d-amphetamine (d-amp; 1.5 mg/kg, i.p.). Moreover, we ascertained whether HR and LR rats differ in the rewarding effects of medial forebrain bundle electrical self-stimulation and in the ability of d-amp to increase the reinforcing efficacy of self-stimulation. Apart from rearing, HR animals displayed increased moving, sniffing, but decreased standing and yawning compared with LR. Factor analysis revealed a more complex behavioral structure consisting of locomotion, exploration, vertical activity and self-directed behavior for HR compared with LR rats. Qualitative, but not quantitative differences, between the two groups of rats in their behavioral responses to d-amp were found. In particular, a more complex profile mainly characterized by self-directed behavior, locomotion and vertical activity was manifested for HR as compared with LR rats. Baseline brain stimulation reward thresholds did not differ between the two groups of rats. Additionally, brain stimulation reward thresholds for the two groups were not differentially affected by d-amp. The above results suggest that HR and LR can be further differentiated upon exposure to a novel environment and in response to d-amp. This differentiation is primarily based on qualitative cohorts of their behavioral structure, but not on deviations in the reward processes as assessed by intracranial self-stimulation.
Περιγραφή
Λέξεις-κλειδιά
Animals, Dextroamphetamine/*pharmacology, Exploratory Behavior/*drug effects/physiology, *Individuality, Male, Motor Activity/*drug effects/physiology, Rats, Rats, Wistar, *Reward
Θεματική κατηγορία
Παραπομπή
Σύνδεσμος
http://www.ncbi.nlm.nih.gov/pubmed/14706774
http://ac.els-cdn.com/S0306452203007905/1-s2.0-S0306452203007905-main.pdf?_tid=2e4af911c7407632ad0a18bfc5abb514&acdnat=1332924028_fecc2f5a9210c40b48299fc3a77348ad
http://ac.els-cdn.com/S0306452203007905/1-s2.0-S0306452203007905-main.pdf?_tid=2e4af911c7407632ad0a18bfc5abb514&acdnat=1332924028_fecc2f5a9210c40b48299fc3a77348ad
Γλώσσα
en
Εκδίδον τμήμα/τομέας
Όνομα επιβλέποντος
Εξεταστική επιτροπή
Γενική Περιγραφή / Σχόλια
Ίδρυμα και Σχολή/Τμήμα του υποβάλλοντος
Πανεπιστήμιο Ιωαννίνων. Σχολή Επιστημών Υγείας. Τμήμα Ιατρικής