what are the three functions of the acromion process of the scapula?
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Acromion of Scapula. The acromion of the scapula is a large bony projection on the superior end of the scapula. It is an important landmark of the skeletal system and a muscle attachment point essential to the function of the shoulder joint. The acromion also forms the acromioclavicular (AC) joint with the clavicle.
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A conventional bench press uses the pectoralis major, anterior deltoids, and coracobrachialis muscles to horizontally adduct the shoulder. It also uses predominantly triceps and anconeous to extend the elbows.
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The acromioclavicular, or AC, joint is a joint in the shoulder where two bones meet. One of these bones is the collarbone, or clavicle. The second bone is actually part of the shoulder blade (scapula), which is the big bone behind the shoulder that also forms part of the shoulder joint.
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The pectorals are predominantly used to control the movement of the arm, with the contractions of the pectoralis major pulling on the humerus to create lateral, vertical, or rotational motion. The pectorals also play a part in deep inhalation, pulling the ribcage to create room for the lungs to expand.
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The biceps muscle has two heads, the short head and the long head, distinguished according to their origin at the coracoid process and supraglenoid tubercle of the scapula, respectively.
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['The skeleton provides four major functions, which are;', 'Support : It provides a framework to support the organs and tissues of the body.', 'Protection: It protects our internal organs. ... ', 'Movement: It provides a framework for muscles to attach.']
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['The main functions of the vertebral bones are for structure ( posture ) and protection of the spinal cord.', 'The spine is split into five regions: the cervical, thoracic, lumbar, sacral, and coccyx.']
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Functionally, the latissimus dorsi muscle belongs to the muscles of the scapular motion. This muscle is able to pull the inferior angle of the scapula in various directions, producing movements on the shoulder joint; internal rotation, adduction and extension of the arm.
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The Anatomy of the Deltoid Muscle All assist with arm elevation during a process called glenohumeral elevation and play a large role in the movement and overall stability of the shoulder joint and upper arm. The entire deltoid muscle spans from the spine of the scapula to the lateral portion of the clavicle.
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The highest point of the shoulder blade is called the acromion. Strong tissues called ligaments connect the acromion to the collarbone, forming the AC joint. An AC joint sprain occurs when an injury damages the ligaments in the AC joint.
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Function. It helps in extension of the elbow joint and also acts as an antagonist of the biceps and brachialis. The triceps brachii also helps to stabilize the shoulder by keeping the head of the humerus in its correct position in the shoulder joint.
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['lubrication. reduces friction between bones.', 'nutrient distribution. circulates within a joint to provide nutrients and waste disposal for chondrocytes.', 'shock absorption. helps to distribute pressure evenly across the joint.']
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Motor Functions The axillary nerve innervates teres minor and deltoid muscles. Teres minor - part of the rotator cuff muscles which act to stabilise the glenohumeral joint. It acts to externally rotate the shoulder joint and is innervated by the posterior terminal branch of the axillary nerve.
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3 What are the three morphologic types of the acromion? Bigliani classified the acromion according to its shape. Type I acromion is flat (17% incidence); type II (43% incidence) curves downward into the rotator cuff outlet; and type III (40% incidence) is hooked downward into the rotator cuff outlet.
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The bone spurs form as the tissue between the shoulder joint deteriorates which causes the bones of the shoulder to begin to rub together. The tendons that comprise the shoulder and allow it to move in every direction pass through a narrow canal.
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['support the body. suport the body/sittin up muscles keep posture.', 'movement. makes bones and other body parts move.', 'body temperature. helps maintain constant body heat.', 'movement in cardiovascular. assist movement in cardivascular and lympatic vessels.', 'protection.']
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The extrinsic muscles include the trapezius, latissimus dorsi, rhomboid major and minor, levator scapulae and the serratus posterior superior and inferior muscles. The principal function of the extrinsic muscles of the back is to move the upper extremity by controlling the movement of the scapula and humerus.