| Title |
Caffeine increases the velocity of rapid eye movements in unfatigued humans
|
|---|---|
| Published in |
Psychopharmacology, May 2017
|
| DOI | 10.1007/s00213-017-4638-1 |
| Pubmed ID | |
| Authors |
Charlotte J. W. Connell, Benjamin Thompson, Jason Turuwhenua, Robert F. Hess, Nicholas Gant |
| Abstract |
Caffeine is a widely used dietary stimulant that can reverse the effects of fatigue on cognitive, motor and oculomotor function. However, few studies have examined the effect of caffeine on the oculomotor system when homeostasis has not been disrupted by physical fatigue. This study examined the influence of a moderate dose of caffeine on oculomotor control and visual perception in participants who were not fatigued. Within a placebo-controlled crossover design, 13 healthy adults ingested caffeine (5 mg·kg(-1) body mass) and were tested over 3 h. Eye movements, including saccades, smooth pursuit and optokinetic nystagmus, were measured using infrared oculography. Caffeine was associated with higher peak saccade velocities (472 ± 60° s(-1)) compared to placebo (455 ± 62° s(-1)). Quick phases of optokinetic nystagmus were also significantly faster with caffeine, whereas pursuit eye movements were unchanged. Non-oculomotor perceptual tasks (global motion and global orientation processing) were unaffected by caffeine. These results show that oculomotor control is modulated by a moderate dose of caffeine in unfatigued humans. These effects are detectable in the kinematics of rapid eye movements, whereas pursuit eye movements and visual perception are unaffected. Oculomotor functions may be sensitive to changes in central catecholamines mediated via caffeine's action as an adenosine antagonist, even when participants are not fatigued. |
X Demographics
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Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Unknown | 1 | 100% |
Demographic breakdown
| Type | Count | As % |
|---|---|---|
| Members of the public | 1 | 100% |
Mendeley readers
The data shown below were compiled from readership statistics for 67 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Unknown | 67 | 100% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Researcher | 8 | 12% |
| Student > Master | 8 | 12% |
| Student > Doctoral Student | 7 | 10% |
| Student > Bachelor | 6 | 9% |
| Student > Ph. D. Student | 5 | 7% |
| Other | 10 | 15% |
| Unknown | 23 | 34% |
| Readers by discipline | Count | As % |
|---|---|---|
| Neuroscience | 9 | 13% |
| Sports and Recreations | 7 | 10% |
| Nursing and Health Professions | 6 | 9% |
| Psychology | 5 | 7% |
| Agricultural and Biological Sciences | 2 | 3% |
| Other | 11 | 16% |
| Unknown | 27 | 40% |
Attention Score in Context
This research output has an Altmetric Attention Score of 1. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 09 March 2022.
All research outputs
#18,141,324
of 23,305,591 outputs
Outputs from Psychopharmacology
#4,590
of 5,392 outputs
Outputs of similar age
#225,126
of 314,492 outputs
Outputs of similar age from Psychopharmacology
#31
of 50 outputs
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