{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,28]],"date-time":"2026-09-28T17:43:47Z","timestamp":1790617427863,"version":"4.1.0"},"reference-count":37,"publisher":"SAGE Publications","issue":"1","license":[{"start":{"date-parts":[[2020,3,1]],"date-time":"2020-03-01T00:00:00Z","timestamp":1583020800000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["High Altitude Medicine &amp; Biology"],"published-print":{"date-parts":[[2020,3,1]]},"abstract":"<jats:sec>\n                    <jats:title>Background:<\/jats:title>\n                    <jats:p>High altitude sojourn challenges blood flow regulation in the brain, which may contribute to cognitive dysfunction. Neurovascular coupling (NVC) describes the ability to increase blood flow to working regions of the brain. Effects of high altitude on NVC in frontal regions undergoing cognitive activation are unclear but may be relevant to executive function in high-altitude hypoxia. This study sought to examine the effect of incremental ascent to very high altitude on NVC by measuring anterior cerebral artery (ACA) and middle cerebral artery (MCA) hemodynamic responses to sustained cognitive activity.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Materials and Methods:<\/jats:title>\n                    <jats:p>Eight adults (23\u2009\u00b1\u20097 years, four female) underwent bilateral measurement of ACA and MCA mean velocity and pulsatility index (PI) through transcranial Doppler during a 3-minute Stroop task at 1400, 3440, and 4240\u2009m.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results:<\/jats:title>\n                    <jats:p>\n                      Resting MCA and ACA PI decreased with high-altitude hypoxia (\n                      <jats:italic toggle=\"yes\">p<\/jats:italic>\n                      \u2009&lt;\u20090.05). Cognitive activity at all altitudes resulted in similar increases in MCA and ACA mean velocity, and decreases in ACA and MCA PI (\n                      <jats:italic toggle=\"yes\">p<\/jats:italic>\n                      \u2009&lt;\u20090.05 for MCA,\n                      <jats:italic toggle=\"yes\">p<\/jats:italic>\n                      \u2009=\u20090.07 for ACA). No significant altitude-by-Stroop interactions were detected, indicating NVC was stable with increasing altitude.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions:<\/jats:title>\n                    <jats:p>Ascent to very high altitude (4240\u2009m) using an incremental profile that supports partial acclimatization does not appear to disturb (1) increases in cerebral blood velocity and (2) reductions in pulsatility that characterize optimal NVC in frontal regions of the brain during cognitive activity.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1089\/ham.2019.0050","type":"journal-article","created":{"date-parts":[[2019,11,21]],"date-time":"2019-11-21T11:20:51Z","timestamp":1574335251000},"page":"20-27","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":12,"title":["Preservation of Neurovascular Coupling to Cognitive Activity in Anterior Cerebrovasculature During Incremental Ascent to High Altitude"],"prefix":"10.1177","volume":"21","author":[{"given":"Wesley K.","family":"Lefferts","sequence":"first","affiliation":[{"name":"Integrative Physiology Laboratory, Department of Kinesiology and Nutrition, University of Illinois at Chicago, Chicago, Illinois."},{"name":"Department of Exercise Science, Syracuse University, Syracuse, New York."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jacob P.","family":"DeBlois","sequence":"additional","affiliation":[{"name":"Department of Exercise Science, Syracuse University, Syracuse, New York."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jan Elaine","family":"Soriano","sequence":"additional","affiliation":[{"name":"Department of Biology, Mount Royal University, Calgary, Alberta, Canada."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Leah","family":"Mann","sequence":"additional","affiliation":[{"name":"Department of Biology, Mount Royal University, Calgary, Alberta, Canada."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zahrah","family":"Rampuri","sequence":"additional","affiliation":[{"name":"Department of Biology, Mount Royal University, Calgary, Alberta, Canada."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Brittney","family":"Herrington","sequence":"additional","affiliation":[{"name":"Department of Biology, Mount Royal University, Calgary, Alberta, Canada."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Scott","family":"Thrall","sequence":"additional","affiliation":[{"name":"Department of Biology, Mount Royal University, Calgary, Alberta, Canada."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jordan","family":"Bird","sequence":"additional","affiliation":[{"name":"Department of Biology, Mount Royal University, Calgary, Alberta, Canada."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Taylor S.","family":"Harman","sequence":"additional","affiliation":[{"name":"Department of Exercise Science, Syracuse University, Syracuse, New York."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Trevor A.","family":"Day","sequence":"additional","affiliation":[{"name":"Department of Biology, Mount Royal University, Calgary, Alberta, Canada."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kevin S.","family":"Heffernan","sequence":"additional","affiliation":[{"name":"Department of Exercise Science, Syracuse University, Syracuse, New York."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tom D.","family":"Brutsaert","sequence":"additional","affiliation":[{"name":"Department of Exercise Science, Syracuse University, Syracuse, New York."}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"179","published-online":{"date-parts":[[2020,3,17]]},"reference":[{"key":"e_1_3_6_2_1","doi-asserted-by":"publisher","DOI":"10.1113\/EP085671"},{"key":"e_1_3_6_3_1","doi-asserted-by":"publisher","DOI":"10.3357\/ASEM.3661.2013"},{"key":"e_1_3_6_4_1","doi-asserted-by":"publisher","DOI":"10.1038\/nature09613"},{"key":"e_1_3_6_5_1","first-page":"365","article-title":"A new approach to hypobaric hypoxia induced cognitive impairment","volume":"136","author":"Babbar R","year":"2012","unstructured":"Babbar R, and Agarwal S. 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