Research Results For 'Acromion'

ACROMION

The acromion is the lateral projection from the spine of the scapula. The plough blade-like projection serves as a site of attachment for both the trapezius and deltoid muscles, which assist in giving the shoulder its strength during flexion.
Research Acromion

GLENOID CAVITY

The glenoid cavity forms the upper, lateral angle of the scapula, facing to the side of the body. This cavity serves as a site of articulation with the head of the humerus, or upper arm bone. Just to the posterior of the glenoid cavity is the acromion, which juts out from the spine of the scapula on its dorsal surface.
Research Glenoid Cavity

SPINE OF THE SCAPULA

The spine of the scapula is a ridge which runs laterally along the posterior surface of the bone. This spine separates the surface of the back of the scapula into two unequal areas: the supraspinous fossa and the infraspinous fossa. The spine continues laterally to form the coracoid process and the acromion (which articulates with the clavicle). The spine and these two projections serve to anchor much of the connective tissue in the shoulder. The trapezius and deltoid muscles are especially responsible for giving the scapula its stability and strength during movement.
Research Spine of the Scapula

SUBCLAVIUS

The subclavius muscle originates from the costal cartilage of the first rib and inserts in the clavicle near the acromion. It is innervated by the subclavian nerve, which branches from the brachial plexus. The subclavius muscle is supplied by the thorocoacromion artery. This muscle helps stabilize the clavicle and elevate the first rib.
Research Subclavius

TRAPEZIUS

The trapezius is one of the largest shoulder muscles and the most superficial muscle on the back of the neck and upper trunk. It is a broad, flat triangular muscle that lies just below the skin. The muscle originates from the superior nuchal line, the external occipital protuberance, the ligamentum nuchae, and the spinous processes of the seventh cervical and the thoracic vertebrae. It covers the upper back part of the neck and shoulders and inserts in the clavicle, acromion, and upper border of the spine of the scapula. The trapezius is innervated by the accessory nerve (motor) and the cervical plexus (sensory) and is supplied by the cervical artery. This muscle links the neck with the dorsal vertebrae, ribs, and scapula. It is used to turn and tilt the head, raise and twist the arms, and to shrug or steady the shoulders. The trapezius is a postural muscle as well as an active mover.
Research Trapezius

	The Probert Encyclopaedia was designed, edited and programed by Matt and Leela Probert ©1993 - 2009 The Probert Encyclopaedia Southampton, United Kingdom