And it refers to its true anatomical neck, the constriction below the greater and lesser tubercles of the humerus to as its surgical neck for its tendency to fracture, thus often becoming the focus of surgeons. Intertubercular Groove is a thin, longitudinal depression between the lesser and greater tubercles. 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. Shaft or also known as Body is the elongated, cylinder-shaped middle part of the bone. Radial Groove is a small depression placed superior to the capitulum. It articulates with the head of the radius bone at the elbow joint. These two bony bumps you feel are … It is a point of the deltoid muscle attachment. It serves as the insertion site subscapularis muscle. Copyright © 2016 - 2019 How To Relief. Trochlea is a pulley-shaped formation located medial to the capitulum. Above and in front it presents an impression for the insertion of the tendon of the subscapularis. body of humerus. How To Protect Your Eyes From Electronics Devices? The lesser tubercle of the humerus is minor elevation on the front of upper end of humerus, just above the surgical neck. This region provides the location for the head of the radius when the forearm is flexed. 4. All rights reserved. The humerus is described as having a proximal region, shaft, and distal region. You can also flex your bicep and follow the muscle up to the tendon to find the groove. This article incorporates text in the public domain from page 209 of the 20th edition of Gray's Anatomy (1918), Bony projection on the proximal end of the humerus, https://en.wikipedia.org/w/index.php?title=Lesser_tubercle&oldid=984545995, Wikipedia articles incorporating text from the 20th edition of Gray's Anatomy (1918), Creative Commons Attribution-ShareAlike License, This page was last edited on 20 October 2020, at 17:32. This region provides space for the coronoid process of the ulna when the forearm is flexed. Greater tubercle of humerus – lateral (away from armpit) to the groove. Lateral Epicondyle is a rounded protuberance at the distolateral terminus of the humerus. The infraspinatus, supraspinatus, and teres minor muscles attach to this elevation. The lesser tubercle’s surface is marked by a large smooth impression for attachment of the … Lateral Supracondylar Ridge is the roughened margin located superior the lateral epicondyle. The lesser tubercle of the humerus, although smaller, is more prominent than the greater tubercle: it is situated in front, and is directed medially and anteriorly. The greater tubercle of the humerus is situated lateral to the head of the humerus and posterolateral to the lesser tubercle. The lesser tubercle of the humerus is although smaller than the greater tubercle but is quite more prominent since it is situated in front, and is directed medially and anteriorly. The narrow line separating the upper end of humerus from shaft is called SURGICAL NECK. 7 terms. This indentation, which is further designated the bicipital groove, is a way for the tendon of the long head of the biceps brachii. Lesser tubercle of humerus – medial (toward armpit) to the groove. Greater Tubercle is a large, roughened area placed lateral to the head. Coronoid Fossa is a depression located superior to the anterior aspect of the trochlea. Lesser Tubercle is a roughened area found medial to the greater tubercle. subscapularis. 9 terms. The teres major, pectoralis major, and latissimus dorsi muscles also attach here. intertubercular groove "between the tubercles" guides one of the bicep muscle tendons ... "triangle shape rounded bump" Medial epicondyle "middle sits upon the knuckle" superior to trochlea, muscle attachment. Separating the greater tubercle from the lesser tubercle is the intertubercular sulcus, also known as the bicipital groove. Deltoid Tuberosity is a raised, roughened area located on the lateral side of the shaft at its midpoint. The body is cylindrical in its upper section and more prismatic below. ... Bony Landmarks/Muscle Attachments - Scapula, Clavicle, Sternum. pectoralis major, latissimus dorsi, teres major. Most frequently broken part of humerus. Bony Landmarks/Muscle Attachments - Ulna and Radius. Head is a large, rounded, projection that reaches medially from the bone’s proximal end. lesser tubercle of humerus. Intertubercular Groove is a thin, longitudinal depression between the lesser and greater tubercles. Lesser Tubercle is a roughened area found medial to the greater tubercle. It connects with the glenoid fossa of the scapula to form the glenohumeral joint. Medial Epicondyle is a rounded projection at the distomedial end of the humerus. There are three flat facets to which these three muscles attach: Superior facet; Middle facet; Inferior facet; The supraspinatus attaches to the superior facet. The teres minor attaches to the inferior facet. Surgical Neck is a region under the tubercles where the bone narrows and fractures often occur. The infraspinatus , supraspinatus, and teres minor muscles attach to this elevation. The infraspinatus attaches to the middle facet. The humeral upper extremity comprises a rounded head, a narrow neck, and two short processes (tubercles/ tuberosities). V. There is INTERTUBERCLE SULCUS (groove like structure) which separates lesser tubercle from greater tubercle. The GREATER TUBERCLE is an elevation which form the lateral part of upper end. How Many Ounces in a Gallon ? Lesser tubercle "smaller small lump" muscle attachment. Some of the muscles that flex the forearm, wrist, and fingers attach to the anterior surface of this marking. – Easy Explanation, Top 18 Health Benefits of Drinking Water, List of Best Orthopedic Surgeons in the World 2019, Nutrient arteries: Humerus – profunda brachii (Brachial artery), Postaxial vein of upper limb – Basilic vein. intertubercular (or bicpital) groove. Capitulum is a small, knob-like prominence on the distolateral end of the humerus. Anatomical and surgical neck both of the humerus are highly susceptible to fracture. It serves as the insertion site subscapularis muscle. The humerus articulates proximal region by the scapula at the shoulder joint and radius and distal region with ulna at the elbow joint. The posterior surface of the lateral epicondyle accommodates as an attachment point for some of the muscles that extend the wrist and fingers of this hand. The lesser tubercle of the humerus, although smaller, is more prominent than the greater tubercle: it is situated in front, and is directed medially and anteriorly. VI. MUSADIQ KHAN DURRANI 4 5. Anatomical Neck is a grooved constriction within the head and tubercles that serves as an attachment point for the articular capsule. The lower extremity comprises 2 epicondyles, 2 processes (trochlea & capitulum), and 3 fossae (radial fossa, coronoid fossa, and olecranon fossa). The humerus is a long bone which consists of a shaft (diaphysis) and two extremities (epiphysis). It is the longest bone of the upper extremity. This region articulates with the trochlear notch of the ulna bone at the elbow joint. The left shoulder and acromioclavicular joints, and the proper ligaments of the scapula. The brachioradialis muscle attaches this edge of the bone.

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