D-amphetamine boosts language learning independent of its cardiovascular and motor arousing effects
Standard
D-amphetamine boosts language learning independent of its cardiovascular and motor arousing effects. / Breitenstein, Caterina; Wailke, Stefanie; Bushuven, Stefan; Kamping, Sandra; Zwitserlood, Pienie; Ringelstein, E Bernd; Knecht, Stefan.
In: NEUROPSYCHOPHARMACOL, Vol. 29, No. 9, 09.2004, p. 1704-14.Research output: SCORING: Contribution to journal › SCORING: Journal article › Research › peer-review
Harvard
APA
Vancouver
Bibtex
}
RIS
TY - JOUR
T1 - D-amphetamine boosts language learning independent of its cardiovascular and motor arousing effects
AU - Breitenstein, Caterina
AU - Wailke, Stefanie
AU - Bushuven, Stefan
AU - Kamping, Sandra
AU - Zwitserlood, Pienie
AU - Ringelstein, E Bernd
AU - Knecht, Stefan
PY - 2004/9
Y1 - 2004/9
N2 - D-Amphetamine (AMPH) was effective in a number of studies on motor and language recovery after stroke, but given safety concerns, its general use after stroke is still debated. Most stroke patients are excluded from treatment because of a significant risk of cardiovascular dysregulation. AMPH acts on multiple transmitter systems, and mainly the noradrenergic actions are related to the cardiovascular effects. If AMPH's cardiovascular and arousal effects were correlated with its plasticity-enhancing effects in humans, this would imply that desired and undesired effects are inevitably tied. If not, improved cerebral reorganization may not be mediated by AMPH's arousing effects and could be achieved with substances lacking the undesired cardiovascular effects. As a model for language recovery after stroke, we used a prospective, randomized, double-blind, placebo-controlled design and taught 40 healthy male subjects an artificial vocabulary of 50 concrete nouns over the course of five consecutive training days (high-frequency training). The associative learning principle involved higher co-occurrences of 'correct' picture-pseudoword pairings as compared to 'incorrect' pairings. Subjects received either AMPH (0.25 mg/kg) or placebo 90 min prior to training on each day. Novel word learning was significantly faster and better in the AMPH as compared to the placebo group. Increased learning success was maintained 1 month post-training. No correlation was found between training success and drug-induced increases in blood pressure, heart rate, or a facilitation of simple motor reaction time. Our data show that AMPH's plasticity-enhancing effect in humans is not related to its cardiovascular arousal. This suggests that the beneficial effects in stroke patients could also be obtained by less cardiovascular active drugs.
AB - D-Amphetamine (AMPH) was effective in a number of studies on motor and language recovery after stroke, but given safety concerns, its general use after stroke is still debated. Most stroke patients are excluded from treatment because of a significant risk of cardiovascular dysregulation. AMPH acts on multiple transmitter systems, and mainly the noradrenergic actions are related to the cardiovascular effects. If AMPH's cardiovascular and arousal effects were correlated with its plasticity-enhancing effects in humans, this would imply that desired and undesired effects are inevitably tied. If not, improved cerebral reorganization may not be mediated by AMPH's arousing effects and could be achieved with substances lacking the undesired cardiovascular effects. As a model for language recovery after stroke, we used a prospective, randomized, double-blind, placebo-controlled design and taught 40 healthy male subjects an artificial vocabulary of 50 concrete nouns over the course of five consecutive training days (high-frequency training). The associative learning principle involved higher co-occurrences of 'correct' picture-pseudoword pairings as compared to 'incorrect' pairings. Subjects received either AMPH (0.25 mg/kg) or placebo 90 min prior to training on each day. Novel word learning was significantly faster and better in the AMPH as compared to the placebo group. Increased learning success was maintained 1 month post-training. No correlation was found between training success and drug-induced increases in blood pressure, heart rate, or a facilitation of simple motor reaction time. Our data show that AMPH's plasticity-enhancing effect in humans is not related to its cardiovascular arousal. This suggests that the beneficial effects in stroke patients could also be obtained by less cardiovascular active drugs.
KW - Adult
KW - Affect
KW - Arousal
KW - Central Nervous System Stimulants
KW - Dextroamphetamine
KW - Double-Blind Method
KW - Hemodynamics
KW - Humans
KW - Language
KW - Learning
KW - Male
KW - Motivation
KW - Motor Activity
KW - Neuronal Plasticity
KW - Neuropsychological Tests
KW - Reaction Time
KW - Stimulation, Chemical
U2 - 10.1038/sj.npp.1300464
DO - 10.1038/sj.npp.1300464
M3 - SCORING: Journal article
C2 - 15114342
VL - 29
SP - 1704
EP - 1714
JO - NEUROPSYCHOPHARMACOL
JF - NEUROPSYCHOPHARMACOL
SN - 0893-133X
IS - 9
ER -