Spam (food) Spam (stylized SPAM) is a brand of canned precooked meat made by Hormel Foods Corporation. It was first introduced in 1937 and gained popularity worldwide after its use during World War II. By 2003, Spam was sold in 41 countries on six continents and trademarked in over 100 countries (except in Middle East and North Africa).
Subacromial (SA) impingement is defined as the mechanical compression of subacromial structures between the coraco-acromial arch and the humerus during active elevation of the arm above shoulder height.
The scapula is also marked by a shallow, somewhat comma-shaped glenoid cavity , which articulates with the head of the humerus. The top end of the humerus consists of the head, the neck, the greater and lesser tubercles, and the shaft. The head is half-spherical in shape and projects into the glenoid cavity. The neck lies between the head and the greater and lesser tubercles. The greater and lesser tubercles are prominent landmarks on the humerus and serve as attachment sites for the rotator cuff muscles. There are four joints making up the 'shoulder joint': 1  The shoulder joint itself known as the Glenohumeral joint, (is a ball and socket articulation between the head of the humerus and the glenoid cavity of the scapula) 2  The acromioclavicular (AC) joint (where the clavicle meets the acromion of the scapula)