The shoulder muscles play a large role in how we perform tasks and activities in daily life. ... Pectoralis major is a large, fan-shaped muscle stretching from your collarbone to mid-chest.

Week 3: The Small Muscles Around Kyle Chandler’s Eyes and Mouth. By Meghan O'Rourke. Jan 31, 2009 6:45 AM. Friday Night Lights. Copy Link Share Share Comment Copy Link Share Share Comment ...