Naslov
Mean blood flow velocities in posterior cerebral arteries during visual stimulation.

Autori
Lisak, Marijana ; Trkanjec, Zlatko ; Mikula, Ivan ; Demarin, Vida

Izvornik
The Mount Sinai journal of medicine (0027-2507) 72 (2005), 5; 346-350

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
stražnja moždana arterija; vidna stimulacija; TCD
(posterior cerebral artery; visual stimulation; TCD)

Sažetak
Summary Changes of mean blood flow velocities (MBFV) in the posterior cerebral arteries (PCA) recorded during visual stimulation in a group of 51 healthy, right-handed volunteers are presented. There were 27 (52.9%) males and 24 (47.1%) females aged from 20 to 59 years (mean age 36.98 years). Measurements were performed with hand-held 2 MHz transcranial Doppler ('I'CD) probe through temporal window, while the subjects had eyes opened, closed and when looking at constant and flashing white light. In half of the subjects, first right PCA was insonated and then left PCA, while in the other half a reverse procedure was used. Statistical analysis was made using Wilcoxon's matched-pair signed-rank test. Mean MBFV value in the left PCA was 41.2&plusmn ; ; 8.6 cm/s (mean &plusmn ; ; SD) with eyes opened, 27.8&plusmn ; ; 8.5 cm/s with eyes closed, 42.3&plusmn ; ; 9.1 cm/s while looking at constant white light, and 43.0&plusmn ; ; 9.6 cm/s while looking at flashing white light. Mean MBFV value in the right PCA was 41.7&plusmn ; ; 8.9 cm/s with eyes opened, 28.2&plusmn ; ; 9.1 cm/s with eyes closed, 42.4&plusmn ; ; 8.8 cm/s while looking at constant white light, and 43.4&plusmn ; ; 9.2 while looking at flashing white light. Differences between eyes opened and closed, between eyes opened and constant and flashing white light in the left PCA were statistically significant (p<0.001, z=-6.2146, and p<0.001, z=-3.4836, respectively). In the right PCA, a difference between eyes opened and closed and between eyes opened and flashing white light was statistically significant (p<0.001, z=-6.2146 and p<0.001, z=-3.6928), but there was no significance between eyes opened and constant white light (p=0.03, z=-2.1693). The results showed that simple visual stimulation had an effect on blood flow velocities in PCA and that it could be measured with TCD.

Izvorni jezik
Engleski

Znanstvena područja
Kliničke medicinske znanosti

POVEZANOST RADA