<P> The shoulder girdle is a complex of five joints that can be divided into two groups . Three of these joints are true anatomical joints while two are physiological ("false") joints . Within each group, the joints are mechanically linked so that both groups simultaneously contribute to the different movements of the shoulder to variable degrees . </P> <P> In the first group, the scapulohumeral or glenohumeral joint is the anatomical joint mechanically linked to the physiological subdeltoid or suprahumeral joint (the "second shoulder joint") so that movements in the suprahumeral joint results in movements in the glenohumeral joint . In the second group, the scapulocostal or scapulothoracic joint is the important physiological joint that cannot function without the two anatomical joints in the group, the acromioclavicular and sternoclavicular joints, i.e. they join both ends of the clavicle . </P> <P> The glenohumeral joint is the articulation between the head of the humerus and the glenoid cavity of the scapula . It is a ball and socket type of synovial joint with three rotatory and three translatory degree of freedom . The glenohumeral joint allows for adduction, abduction, medial and lateral rotation, flexion and extension of the arm . </P> <P> The acromioclavicular joint is the articulation between the acromion process of the scapula and the lateral end of the clavicle . It is a plane type of synovial joint . The acromion of the scapula rotates on the acromial end of the clavicle . </P>

Write the names of shoulder gridle and hip gridle