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Accepted (AM)Open Access (License Unspecified), Open
Journal article
Methylphenidate and atomoxetine enhance sensory-evoked neuronal activity in the visual thalamus of male rats
Experimental and clinical psychopharmacology, v 21(5), pp 363-374
01 Oct 2013
PMID: 24099357
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Attention deficits and inappropriate regulation of sensory signal processing are hallmarks of many neuropsychiatric conditions, including attention deficit hyperactivity disorder (ADHD), for which methylphenidate (MPH) and atomoxetine (ATX) are commonly prescribed therapeutic treatments. Despite their widespread use and known mechanism of blocking reuptake of catecholamine transmitters in the brain, the resultant actions on individual neuron and neural circuit function that lead to therapeutic efficacy are poorly understood. Given the ability of MPH and ATX to improve cognitive performance in humans and rodent assays of attention, we were interested in their influence on early sensory processing in the dorsal lateral geniculate nucleus (dLGN), the primary thalamic relay for visual information from the retina to the visual cortex. In male rats, dLGN neuronal responses to light stimuli were altered in multiple ways following doses of MPH or ATX observed to enhance performance in visually-guided assays of attention in rats (MPH, 2 mg/kg; ATX, 0.5 mg/kg). Latencies to response onset and to the peak of the primary response were decreased, while the peak intensity and area of the primary response were increased. In addition, some cells that were unresponsive to light stimuli prior to drug treatment displayed a ‘gating effect,’ wherein prominent responses to light stimuli were evident following drug administration. Our results begin to reveal unique effects of MPH and ATX in enhancing sensory signal transmission through visual circuitry, and may yield new insights for understanding the pathophysiology of certain cognitive disorders and inform development of improved therapeutic treatments for these conditions.
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Details
- Title
- Methylphenidate and atomoxetine enhance sensory-evoked neuronal activity in the visual thalamus of male rats
- Creators
- Rachel L. Navarra - Drexel UniversityBrian D. Clark - Drexel UniversityGerard A. Zitnik - Drexel University College of Medicine, Neurobiology and AnatomyBarry D. Waterhouse - Drexel University
- Publication Details
- Experimental and clinical psychopharmacology, v 21(5), pp 363-374
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Neurobiology and Anatomy; [Retired Faculty]
- Web of Science ID
- WOS:000325241800004
- Scopus ID
- 2-s2.0-84887526375
- Other Identifier
- 991019168805604721
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InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Web of Science research areas
- Pharmacology & Pharmacy
- Psychiatry
- Psychology, Biological
- Psychology, Clinical