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.
First, let us take a look at US Census data: Source: US Census This is the most comprehensive look at US household income data. According to the latest Census data the median household income in the US is $52,250. Of course inflation eats away at purchasing power and things like housing and college tuition are quickly outpacing wage gains.