Cocaine normally stays in the system for approximately 48 hours. Although the method of administration and the dose administered affects how long it takes for the body to metabolize this drug. When coca leaves are chewed, absorption time is around 30 minutes.
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).
Strengthening the adduction muscles provides stability to the shoulder joint. Photo Credit gpointstudio/iStock/Getty Images. While you may not give it much thought, the muscles that bring your arm in towards your body are actually quite important. This movement, known as adduction, uses the muscles that make activities like throwing a ball or swinging a tennis racket possible. They also play a vital role in stabilizing your shoulder joint.