Contains the spinal cord from the brain stem to the upper lumbar spine. There is no spinal cord in the lower lumbar spine. At the L1 level, the spinal cord terminates as the conus medullaris. A bundle of nerves called the cauda equina (meaning horse's tail) branch off the conus medullaris.These nerve roots are suspended in the fluid-filled dural sac.2 Thoracic vertebra (T1-T12). 5 Lumbar vertebra (L1-L5). The sacrum and coccyx are made up of 9 fused vertebrae. Each vertebra is attached to the one above and below it by ligaments and muscles and is separated from the vertebra above and below it by an intervertebral disc.
In the September 2014 Census Bureau report on income and poverty in the U.S., the median household income in America across all jobs was $51,939. That reflects 2013 information; 2014 data will be out in September of this year. That figure was not statistically different from 2012, reflecting continually stagnant wages.
The average US income is a less useful measure because it is skewed by high income households and mega income earners. According to Social Security tax records for 2011 you have 93 Americans making more than $50,000,000 with average earnings of $79,000,000+.ccording to this information 151 million Americans earned some sort of wages or compensation in 2011. The median wage in the US per person is $26,695. This tells us a lot since the median household income is at $50,500. Since the Census data looks at households, this data hones in on individual wage earners.