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...
The moon bear has medium length jet black fur that is shaggy in the front and sides. Sometime their color is dark brown to chocolate. They display a magnificent crescent moon pattern on their chest that stands out against their dark body. Sometimes the area around their muzzle and near their nose is white.he moon bear has medium length jet black fur that is shaggy in the front and sides. Sometime their color is dark brown to chocolate. They display a magnificent crescent moon pattern on their chest that stands out against their dark body. Sometimes the area around their muzzle and near their nose is white.