Muscles of arm (table 9-1). The muscles of the anterior arm are the biceps, coracobrachialis, and brachialis. They are supplied by the musculocutaneous nerve. The triceps is the muscle of the posterior arm, and it is supplied by the radial nerve.he muscles of the anterior arm are the biceps, coracobrachialis, and brachialis. They are supplied by the musculocutaneous nerve. The triceps is the muscle of the posterior arm, and it is supplied by the radial nerve.
1 Based on analysis on US median household income, median household money income during the 2006-2012 period had an average (but not median) of $53,836, therefore by comparison the Gallup result is underreported and is even below the Census' own figures.
According to the US Census Bureau, the average salary in America is $35,000. Assuming this average remains the same throughout the average working career of 40 years, as a rough way to consider the impact of inflation, then the average American would earn $1,400,000 in their lifetime. Most analysis tools use average household income, which is approximately $51,000.