PMID- 30729534 OWN - NLM STAT- MEDLINE DCOM- 20191129 LR - 20191129 IS - 1097-0096 (Electronic) IS - 0091-2751 (Linking) VI - 47 IP - 5 DP - 2019 Jun TI - Effect of reading with direct or indirect light on the visually evoked flow response in the posterior cerebral artery. PG - 272-277 LID - 10.1002/jcu.22702 [doi] AB - PURPOSE: Reading with direct light from computer monitors or tablets may cause visual fatigue and hamper reading comprehension. Our aim was to compare the blood flow response in the supplying artery of the visual cortex when reading from tablet screen or from paper. The neurovascular coupling was tested also after 15-minute reading from either monitor or paper. METHODS: Flow velocity responses evoked by reading from paper and from monitor were measured by transcranial Doppler sonography in a random sequence in both posterior cerebral arteries (PCAs) of 20 young healthy adults. Afterward, PCA flow response evoked by reading from paper was also investigated after 15 minutes reading on the same tablet or paper, in a random order. RESULTS: Reading from monitor with its own source of light and reading from paper with indirect light caused very similar PCA flow response. Moreover, the flow velocity increase, evoked by reading form paper did not differ after 15-minute reading from monitor or from paper. CONCLUSIONS: Reading with direct or indirect light produces similar flow response in the occipital cortex. CI - (c) 2019 Wiley Periodicals, Inc. FAU - Balogh, Eszter AU - Balogh E AUID- ORCID: 0000-0001-5343-9867 AD - Department of Neurology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary. FAU - Arokszallasi, Tamas AU - Arokszallasi T AD - Department of Neurology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary. FAU - Csiba, Laszlo AU - Csiba L AD - Department of Neurology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary. FAU - Olah, Laszlo AU - Olah L AD - Department of Neurology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary. LA - eng GR - 2017-1.2.1-NKP-2017-00002/Hungarian National Brain Research Program/ GR - NAP_13-1-2013-0001/Hungarian National Brain Research Program/ GR - NKFH-K 120042 and K 109712/Hungarian National Research, Development and Innovation Office/ PT - Journal Article DEP - 20190206 PL - United States TA - J Clin Ultrasound JT - Journal of clinical ultrasound : JCU JID - 0401663 SB - IM MH - Adult MH - Blood Flow Velocity MH - Computers, Handheld MH - *Evoked Potentials, Visual MH - Female MH - Healthy Volunteers MH - Humans MH - Male MH - Posterior Cerebral Artery/diagnostic imaging/*physiology MH - *Reading MH - *Ultrasonography, Doppler, Transcranial MH - Young Adult OTO - NOTNLM OT - neurovascular coupling OT - reading OT - transcranial Doppler ultrasonography EDAT- 2019/02/08 06:00 MHDA- 2019/11/30 06:00 CRDT- 2019/02/08 06:00 PHST- 2018/09/04 00:00 [received] PHST- 2018/12/01 00:00 [revised] PHST- 2019/01/19 00:00 [accepted] PHST- 2019/02/08 06:00 [pubmed] PHST- 2019/11/30 06:00 [medline] PHST- 2019/02/08 06:00 [entrez] AID - 10.1002/jcu.22702 [doi] PST - ppublish SO - J Clin Ultrasound. 2019 Jun;47(5):272-277. doi: 10.1002/jcu.22702. Epub 2019 Feb 6.