abducts the arm assists in flexion … The acromial part or the lateral part - abduction of the upper arm. Depending on the activated part, the deltoid muscle provides the following movements of the upper limb: The clavicular or anterior part - internal rotation of the upper arm. It is named after the Greek letter delta, which is shaped like an equilateral triangle. There are many exercises that can accomplish this: below, we’ve listed four of … Classified as part of the scapulohumeral (intrinsic shoulder) muscle group, the anterior deltoid is situated medial to the lateral deltoid and lateral to the clavicular head of The anterior deltoid is responsible for lifting a weight to the front of your body, but it also assists in other movements. 50 The varying techniques differ in the type of material used to attach the deltoid to the triceps. This area of the muscle originates on your clavicle and runs down to connect on the humerus, or upper arm. This is another very important lesson about functional muscle anatomy.In this post you will find out everything you need to know about the functional anatomy of the posterior deltoid muscle – shape (appearance), function (muscle action), location, insertion, and origin.. Brief Introduction Into Shoulder Muscles anterior lateral 1/3 of clavicle lateral aspect of acromion process inferior edge of scapular spine. The name deltoid is derived from the Greek letter delta, which looks like a triangle. The deltoid is a grouping of three separate, but interconnected bands: the lateral, anterior, and posterior deltoid. Deltoid Anatomy. Classified as part of the scapulohumeral (intrinsic shoulder) muscle group, the anterior deltoid is situated medial to the lateral deltoid and lateral to the clavicular head of the pectoralis major. Deltoid injuries or damage are often indicated when generally using your arm, and especially lifting your arm causes some pain, but movement of the arm and shoulder are not necessarily restricted. Main Abductor of the Arm The deltoid muscle is a muscle that is shaped like an inverted triangle at the shoulder area (it gives your shoulder a round appearance). extends & laterally rotates arms with posterior fibers. The deltoid tuberosity is a triangular-shaped area on the humerus, located about halfway down the bone. Action As it has already been discussed, and shown by the game of Simon Says at the beginning of the lesson, the deltoid muscle is responsible for many different actions of the arm around the shoulder joint. Search. fitdevmo - April 17, 2020 April 12, 2020. Teres major: Inferior angle of the scapula: Medial lip of bicipital groove Located on the back of the shoulder - medial to the lateral deltoid and lateral to the middle trapezius - the posterior The axillary nerve is at risk during shoulder surgery and should always be identified and protected. The anterior deltoid attaches at the collarbone and allows you to flex your shoulder joint and rotate the shoulder inward. The posterior deltoid (L. posterior, behind ; deltoides, triangular) refers to the rear head of the three-headed deltoid muscle. This part of the delt is responsible for shoulder flexion. The deltoid is that big upside-down triangle of a muscle group that starts at the top of the shoulder and goes down to almost point at the triceps. ... Start studying Deltoid. The deltoid muscle is separated into three parts -an anterior, middle and posterior part. It is the shortening action of this muscle that pulls the humerus into an upright position. 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