Transcranial Doppler Assessment of Cerebral Flow Velocity During Cognitive Tasks Roger E. Kelley, MD; Jen Y. Chang, MS; Nancy J. Scheinman, PhD; Bonnie E. Levin, PhD; Robert C. Duncan, PhD; and Shih-Chang Lee, PhD Background and Purpose: The purpose of this study was to assess the ability of transcranial Doppler ultrasonography to detect selective circulatory changes during cognitive activity. Methods: We measured cerebral artery flow velocity in 21 normal volunteers by transcranial Doppler ultrasonography during rest followed by cerebral activation. Mean and peak systolic
Neptune has dark storms and eight named moons, although there are more than 8 moons. Source(s): My memory http://burro.astr.cwru.edu/stu/neptune_m...
Blood Moon may originate from the red glow a Full Moon get as Earth casts its darkest shadow, the umbra, on it. The term is sometimes used to describe 4 total lunar eclipses that occur in a row. A total lunar eclipse can be a Blood Moon. Blood Moon is sometimes used to describe 4 total lunar eclipses in a row. Â©iStockphoto.com/wrangel.