Introduction to Spinal Rotation. Rotation is a basic spinal movement in which you turn the spine around itself (called turning around the axis, with the axis being the spine.) When you twist your spine, it also bends to the side as a secondary part of that action. This is due to the way the vertebra fit together.
Population of Portland, OR. Last official estimated population of Portland city (Clackamas County**, Oregon state) was 619,360 (year 2014)[1]. This was 0.194% of total US population and 15.37% of total Oregon state population. Area of Portland city is 145.1 miÂ² (=375.8 kmÂ²)[6], in this year population density was 4,268.36 p/miÂ². If population growth rate would be same as in period 2010-2014 (+1.49%/yr), Portland city population in 2017 would be 647,464*.
With 609,456 residents (2013 estimate), Portland is the largest city in Oregon and ranks 29th in the U.S. Its metro population of 2,314,554 (2013 estimate) is 24th. The Willamette Valley in western Oregon is the state's most densely populated area, home to eight of the ten most populous cities.regon is 295 miles (475 km) north to south at longest distance, and 395 miles (636 km) east to west at longest distance. In land and water area, Oregon is the ninth largest state, covering 98,381 square miles (254,810 km 2).