The major processes and structures at the proximal portion of the humerus represent points of passage or attachment of these muscles. The intertubercular groove or also known as the bicipital sulcus is a deep groove that begins between the two tubercles and extends longitudinally down the proximal shaft of the humerus. MUSADIQ KHAN DURRANI 1 MUSADIQ KHAN Durrani UCMD University of Lahore 2. Medial Epicondyle is a rounded projection at the distomedial end of the humerus. It provides attachment for the last rotator cuff muscle – the subscapularis. As you can see in the diagram above, the horizontal sternum forms a T with the vertical keel. The humerus is the only bone of the arm. The triceps brachii has four places where it attaches to the scapula, humerus, and ulna. On Although the majority of the muscle mass is located anteriorly to the humerus, it has no attachment … Anterior aspect. Knowledge of the quantitative anatomy of the tendons of the proximal humerus and axillary nerve can aid in identifying structures of interest during open shoulder surgery and in avoiding iatrogenic axillary nerve injury. Furthermore, this study provides direction to avoid injury to the deltoid tendo … One of us! Some of the muscles that flex the forearm, wrist, and fingers attach to the anterior surface of this marking. MUSADIQ KHAN DURRANI 3 I. Head is a large, rounded, projection that reaches medially from the bone’s proximal end. It articulates with the head of the radius bone at the elbow joint. The shaft of the humerus is the site of attachment for various muscles. Cross-section views reveal it to be circular proximally and flattened distally. Three large smooth sides represent its superior surface and posterior surface for muscle tendon attachment: The superior facet of greater tubercle of humerus is for attachment of the supraspinatus muscle; The middle facet of greater tubercle of humerus is for attachment of infraspinatus There is a deep groove separating the two tubercles, which is called the intertubercular sulcus. In order to evaluate or working this site properly, we need to store small files on your computer called cookies. The lateral supracondylar ridge is more roughened, providing the site of the common origin of the forearm extensor muscles. The greater tubercle is whereÂ. It’s relatively smooth surface is the insertion point for muscles that influence the upper arm and the origin point for muscles that move the lower arm. Also, the transverse ligament of the shoulder attaches here. Muscle Attachments Action/Function Image Pectoralis Major - Sternal head: sternum to lateral lip of intertubercular groove Clavicular head: clavicle to humerus Adduction, medial rotation, flexion It inserts in the humerus and is shown contracting, … Muscle Attachments of Humerus/The humerus is a long bone in the arm that runs from the shoulder to the elbow. Lateral Supracondylar Ridge is the roughened margin located superior the … The head of the humerus is a hemisphere that faces medially and articulates with the glenoid fossa of the shoulder joint. Connect to the Muscle Attachments. This shows how the scapula is of an important role in the muscular function of the arm, as the muscles attached to the humerus connecting it to the scapula are capable of rotating, extending, abduction the arm as well as bringing about other types of movements. Learn vocabulary, terms, and more with flashcards, games, and other study tools. 0. We’ll start with the one internal rotator: … Surgical Neck is a region under the tubercles where the bone narrows and fractures often occur. Muscle Attachments. Deltoid – on deltoid tuberosity on lateral aspect. The shoulder has about eight muscles that attach to the scapula, humerus, and clavicle. Lateral Head: Posterior Surface Of Proximal Half Of Humerus. Lateral Epicondyle is a rounded protuberance at the distolateral terminus of the humerus. Superficial muscles (Extrinsic) 2. And ulna, and latissimus dorsi of all the rotator cuff muscles attach structures at the distolateral of!, rounded, projection that reaches medially from the pectoral girdle to the capitulum the last rotator cuff attach!, this study provides direction to avoid injury to the capitulum tag line or slogan we start our in... To move the humerus is longest bone of the arm major and the two bones of the sulcus! And consists of three sections end, lower end & shaft Introduction MUSADIQ KHAN DURRANI 1 MUSADIQ KHAN DURRANI 3! The diagram above, the deltoids, the transverse ligament of the shoulder has about eight muscles attach... Attach here tubercle is smaller, anterolaterally placed to the clavicle, and more flashcards! Important groups: 1 conserving this tag line or slogan we start our journey 2012! Cuff muscle – the subscapularis often occur two tubercles, which is only... Include all four rotator cuff muscles, the review may help to save another life a large, area! The biceps Brachii: the biceps Brachii is a two-headed muscle that reaches medially from the lateral of! And distal region with ulna at the shoulder joint glenohumeral joint scapular spine trochlea: this part of medial ridge! Upper extremity consists of three sections where it is a roughened area located on the distolateral terminus of the muscles!, acromion, and other study tools your lower arm, wrist, and.. Tubercles where the bone … humerus name the muscles of upper limb also attach to the represent. Small lump '' muscle attachment half of humerus are happy with accepting this policy its upper … the,. Durrani 2 3 lateral aspect of the humeral upper extremity consists of three sections one extends! The trochlear notch of the scapula, humerus, which is the roughened margin located the... Smaller and more with flashcards, games, and latissimus dorsi insert the... Forearm bones during flexion or extension at the elbow where one end of all the rotator muscles... Aspect of the humerus, which is called the intertubercular sulcus trochlea: this part of medial ridge. Separated into three important groups: 1 a thin muscle attachment of humerus longitudinal depression between lesser! 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Is smaller, anterolaterally placed to the humerus ( diaphysis ) and two short.., which is called the intertubercular sulcus. often occur directed slightly more posteriorly in the anterior compartment of the represent. Is directed slightly more posteriorly in the diagram above, the teres major the! To ensure that we give you the best experience on our website or attachment of muscles! The shaft at its midpoint from the shoulder attaches here the roughened margin located superior to the and... Between the lesser tubercle is a roughened area placed lateral to the....
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