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Decrease of velocity and acceleration of fast eye movement after the administration of methadone

Published online by Cambridge University Press:  23 March 2020

P. Walecki ,
E. Gorzelanczyk ,
J. Feit  and
M. Kunc
P. Walecki*
Affiliation:
Jagiellonian University Medical College, Department of Bioinformatics and Telemedicine, Kraków, Poland
E. Gorzelanczyk
Affiliation:
Nicolaus Copernicus University in Torun, Collegium Medicum, Bydgoszcz, Poland
J. Feit
Affiliation:
Nicolaus Copernicus University in Torun, Collegium Medicum, Bydgoszcz, Poland
M. Kunc
Affiliation:
Airedale NHS Trust, Faculty of Medicine, Steeton, United Kingdom
*
* Corresponding author.

Abstract

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Aims

The goal of this study is to assess the differences in peak and medium velocity, peak and medium acceleration of eyeball movements after the administration of methadone.

Materials and methods

Twenty-eight opioid addicts were examined. Patients admitted oculomotor impaired were excluded.

In this study, we made use of the Saccadometer Advanced (Advanced Clinical Instrumentation, Cambridge, UK), allowing the measurement of eye position with the time resolution of 1 msec (1000 Hz). The eye movement measurement is automated and synchronised with stimuli presentation. Before and after the administration of methadone two saccadic tests were carried out: Prosaccades Test (PT) and Antisaccades Test (AT).

Results

The average of peak and medium velocity and the average of peak and medium acceleration of eyeball movements in the test AT were lower than in the PT test. After administration of a single dose of methadone the peak and medium velocity, peak and medium acceleration decreased in both tests (PT and AT). After administration of methadone prolonged the duration of saccades, and prolonged the duration of rising and falling slope of saccades.

Conclusion

It was found that methadone (μ-opioid receptor agonist) is associated with change of velocity and acceleration of eyeball movements.

Disclosure of interest

The authors have not supplied their declaration of competing interest.

Type
EV120
Information
European Psychiatry , Volume 33 , Issue S1: Abstracts of the 24th European Congress of Psychiatry , March 2016 , pp. S322
Copyright
Copyright © European Psychiatric Association 2016
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