Atomoxetine and Reward size equally improve task engagement and perceptual decisions but differently affect movement execution - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Neuropharmacology Année : 2023

Atomoxetine and Reward size equally improve task engagement and perceptual decisions but differently affect movement execution

Résumé

Our ability to engage and perform daily activities relies on balancing the associated benefits and costs. Rewards, as benefits, act as powerful motivators that help us stay focused for longer durations. The noradrenergic (NA) system is thought to play a significant role in optimizing our performance. Yet, the interplay between reward and the NA system in shaping performance remains unclear, particularly when actions are driven by external incentives (reward). To explore this interaction, we tested four female rhesus monkeys performing a sustained Go/NoGo task under two reward sizes (low/high) and three pharmacological conditions (saline and two doses of atomoxetine, a NA reuptake inhibitor: ATX-0.5 mg/kg and ATX-1 mg/kg). We found that increasing either reward or NA levels equally enhanced the animal's engagement in the task compared to low reward saline; the animals also responded faster and more consistently under these circumstances. Notably, we identified differences between reward size and ATX. When combined with ATX, high reward further reduced the occurrence of false alarms (i.e., incorrect go trials on distractors), implying that it helped further suppress impulsive responses. In addition, ATX (but not reward size) consistently increased movement duration dose-dependently, while high reward did not affect movement duration but decreased its variability. We conclude that noradrenaline and reward modulate performance, but their effects are not identical, suggesting differential underlying mechanisms. Reward might energize/invigorate decisions and action, while ATX might help regulate energy expenditure, depending on the context, through the NA system.
Fichier principal
Vignette du fichier
Manuscript_Reward_ATX_CPT_Printed.pdf (1.83 Mo) Télécharger le fichier
Origine Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-04286752 , version 1 (15-11-2023)

Identifiants

Citer

Kristin Kaduk, Tiphaine Henry, Jerome Guitton, Martine Meunier, David Thura, et al.. Atomoxetine and Reward size equally improve task engagement and perceptual decisions but differently affect movement execution. Neuropharmacology, 2023, 241, pp.109736. ⟨10.1016/j.neuropharm.2023.109736⟩. ⟨hal-04286752⟩
24 Consultations
14 Téléchargements

Altmetric

Partager

Gmail Mastodon Facebook X LinkedIn More