Anesthesiologist Compensation by Geographical Region. Anesthesiologist compensation varies significantly by region. Doctors in the North Central region, with the highest compensation (a mean of $383,000 in 2012), earn 20% more than their colleagues in the West, with the lowest compensation (a mean of $318,000 in 2012). In 2011, the spread was not as wide.
The anterior boundary is called the anterior axillary fold and this is rounded in shape and formed by the lower border of the pectoralis major. Some sources also include the pectoralis minor. It can elongate after weight loss.
Arm Abduction. Abduction of the arm is also called abduction of/at the shoulder. This motion actually can be divided into two motions: true abduction of the arm at the shoulder and upward rotation of the scapula. Muscles: supraspinatus (initiates abduction - first 15 degrees), deltoid (up to 90 degrees), trapezius and serratus anterior (scapular rotation, for abduction beyond 90 degrees).