Caffeinated energy drink intake modulates motor circuits at rest, before and after a movement

Autor: Jacqueline Babayev, Rowan Metwaly, Fortunato Battaglia, Hesam Naenifard, Diego Coira, Eileen Chusid, Eugenio Aguglia, Carmen Concerto, Carmenrita Infortuna
Jazyk: angličtina
Rok vydání: 2017
Předmět:
0301 basic medicine
Adult
Male
Energy drink
Plasticity
medicine.medical_treatment
Rest
Stimulation
Experimental and Cognitive Psychology
Motor Activity
03 medical and health sciences
Behavioral Neuroscience
0302 clinical medicine
Double-Blind Method
Caffeine
Neuroplasticity
Neural Pathways
medicine
Reaction Time
Energy Drinks
Humans
Evoked potential
Muscle
Skeletal
Movement preparation
Post-exercise facilitation
Cross-Over Studies
Neuronal Plasticity
Motor Cortex
Neural Inhibition
Cortical excitability
Evoked Potentials
Motor
Hand
Transcranial Magnetic Stimulation
Transcranial magnetic stimulation
030104 developmental biology
medicine.anatomical_structure
TMS
Facilitation
Silent period
Central Nervous System Stimulants
Female
medicine.symptom
Psychology
Neuroscience
030217 neurology & neurosurgery
Muscle contraction
Motor cortex
Popis: Energy drinks are thought to improve certain aspects of athletic and cognitive performances. Moreover, less is understood about physiological mechanisms that might underlie these effects. The aim of this study was to examine the influence of sugar-free energy drink (SFED) ingestion on corticomotor excitability and plasticity. Fourteen college students consumed a commercially available SFED or a "dummy" drink. By using Transcranial magnetic Stimulation (TMS) we investigated resting motor threshold (RMT), motor evoked potential (MEP) amplitude and cortical silent period (CSP). Paired-pulse stimulation was used to assess short interval intracortical inhibition (SICI) and intracortical facilitation (ICF). Sensorimotor integration was investigated with the short- and long-afferent inhibition paradigms (SAI and LAI). Cortical plasticity was studied with the paired associative stimulation (PAS) paradigm. In addition, we examined the effect of SFED on simple reaction time (RT), pre-movement facilitation and post-exercise facilitation (PEF). SFED consumption decreased ICF, shortened RT, increased pre-movement facilitation and PEF of the motor evoked potentials. These results demonstrate that SFED consumption induced a shorter RT that is paralleled by changes in cortical excitability at rest, prior and after a non-fatiguing muscle contraction. These acute changes in brain function might be of relevance in understanding the mechanisms underlying the enhancement of psychomotor performance.
Databáze: OpenAIRE
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