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.
The muscles that provide the movement for the shoulder and upper arm include the anterior muscles in the front, the posterior muscles in the back, and the shoulder muscles that are sort of in between. Pectoralis major: This muscle has two heads, or sections of muscle tissue, and covers much of the front of the thoracic cage.
Movements of the Upper Limb - Page 6 of 18. Adduction of the arm is also called adduction of/at the shoulder. This motion can be divided into two motions: downward rotation of the scapula and true adduction of the arm at the shoulder. Muscles: pectoralis major and minor, latissimus dorsi, teres major, gravity (depending on body position), and even the lowest fibers of the deltoid (making deltoid its own antagonist)