Influence of physiological changes of glycemia on VEPs and visual ERPs

Title:

Influence of physiological changes of glycemia on VEPs and visual ERPs

Creator:

Kubová, Z., Chlubnová, J., Szanyi, J., Kuba, M., and Kremláček, J.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:2f6c8970-aa38-4c50-bd62-f63624a847d0
uuid:2f6c8970-aa38-4c50-bd62-f63624a847d0

Subject:

Hypoglycemia, Visual event related potentials, Cognitive potentials, Evoked potentials, Fasting, and Exertion

Type:

article, model:article, and TEXT

Description:

Since hypoglycemia is known to influence cognitive functions, we checked whether the physiological changes in glycemia (after fasting or exertion) can explain the rather high intra-individual variability of event-related potentials (ERPs). Besides the ERPs to “change in coherence of a moving pattern” with reaction time (RT) recording, binocular pattern reversal VEPs and motion-onset VEPs (to linear and radial motion) were also examined in 14 healthy subjects prior to and after 24-h fasting that decreased glycemia from 5.3 to 3.9 mmol/l on the average. We only found one significant change in the latencies and amplitudes of VEPs and ERPs (with no change of RT). The N160 peak in the motion-onset VEPs to radial (expansive) motion (EM-VEPs) showed a larger amplitude at lower glycemia. For evaluation of the exertion influence, we tested glycemia prior to and after 90 min long exercise – bicycle ergometry with the load set to 2 W/kg in women and 2.5 W/kg in men (average age-related values for W170/kg index). The changes of glycemia to exertion were, however, less distinct than those to fasting. We conclude that in healthy subjects the glycemia decrease due to 24-h fasting or intensive time-limited exercise never reaches the critical value to change the VEP, ERPs and RTs.

Language:

English

Rights:

http://creativecommons.org/licenses/by-nc-sa/4.0/
policy:public

Source:

Physiological research | 2005 Volume:54 | Number:2

Harvested from:

CDK

Metadata only:

false