Categories: Skeletal system | Wrist eMedicine is an online clinical medical knowledge base that was founded in 1996. ... This article is about the skeletal organs. ... In humans, the upper limb is an anatomical term for the limb that is attached to the pectoral girdle. ... The pectoral girdle is the set of bones which connect the upper limb to the axial skeleton on each side. ... Collarbone and collar bone redirect here. ... At the posterior border of the scapula, near the point where the prismatic joins with the flattened portion, is a rough eminence, the conoid tubercle (or coracoid tuberosity); this, in the natural position of the bone, surmounts the coracoid process of the scapula, and gives attachment to the conoid ligament. ... From the coracoid tuberosity an oblique ridge, the trapezoid line (or trapezoid ridge, or oblique), runs forward and lateralward, and afford attachment to the trapezoid ligament. ... On the medial part of the clavicle is a broad rough surface, the costal tuberosity (impression for costoclavicular ligament), rather more than 2 cm. ... On the medial part of the clavicle is a broad rough surface, the costal tuberosity (rhomboid impression), rather more than 2 cm. ... Left scapula - front view () Left scapula - rear view () In anatomy, the scapula, or shoulder blade, is the bone that connects the humerus (arm bone) with the clavicle (collar bone). ... The spine of the scapula is a prominent plate of bone, which crosses obliquely the medial four-fifths of the dorsal surface of the scapula at its upper part, and separates the supra- from the infraspinatous fossa. ... The suprascapular notch (or scapular notch) is a notch in the lateral part of the upper border of the scapula, just next to the base of the coracoid process. ... The acromion process, or simply the acromion, is an anatomical feature on the scapula. ... Glenoid fossa redirects here, for the other use of Glenoid fossa please see mandibular fossa. ... The glenoidal labrum (glenoid ligament) is a fibrocartilaginous rim attached around the margin of the glenoid cavity. ... In human beings, the coracoid process is a small hook-like structure that comes off the scapula to point forward. ... Left scapula - front view () Left scapula - rear view () In anatomy, the scapula, or shoulder blade, is the bone that connects the humerus (arm bone) with the clavicle (collar bone). ... The supraspinatous fossa (supraspinatus fossa, supraspinous fossa) of the scapula, smaller than the infraspinatous fossa, is concave, smooth, and broader at its vertebral than at its humeral end; its medial two-thirds give origin to the Supraspinatus. ... The infraspinatous fossa (infraspinatus fossa, infraspinous fossa) of the scapula is much larger than the supraspinatous fossa; toward its vertebral margin a shallow concavity is seen at its upper part; its center presents a prominent convexity, while near the axillary border is a deep groove which runs from the upper... Of the three borders of the scapula, the superior border (or superior margin) is the shortest and thinnest; it is concave, and extends from the medial angle to the base of the coracoid process. ... The lateral border (or axillary border, or margin) is the thickest of the three borders of the scapula. ... The medial border of the scapula (vertebral border, medial margin) is the longest of the three borders, and extends from the medial to the inferior angle. ... The superior angle of the scapula (or medial angle), formed by the junction of the superior and vertebral borders, is thin, smooth, rounded, inclined somewhat lateralward, and gives attachment to a few fibers of the Levator scapulae. ... The inferior angle of the scapula, thick and rough, is formed by the union of the vertebral and axillary borders; its dorsal surface affords attachment to the Teres major and frequently to a few fibers of the Latissimus dorsi. ... The lateral angle of the scapula (head of the scapula, acromial angle) is the thickest part of the bone. ... The infraglenoid tubercle is the part of the scapula to which the long head of the triceps brachii attaches. ... The supraglenoid tubercle is a region of the scapula to which the long head of the biceps brachii muscle attaches. ... The humerus is a long bone in the arm or fore-legs (animals) that runs from the shoulder to the elbow. ... The upper extremity of the humerus (proximal humerus) consists of a large rounded head joined to the body by a constricted portion called the neck, and two eminences, the greater and lesser tubercles. ... The anatomical neck of the humerus is obliquely directed, forming an obtuse angle with the body. ... The surgical neck of the humerus is a constriction below the tubercles of the greater tubercle and lesser tubercle. ... The greater tubercle is situated lateral to the head and lesser tubercle. ... The lesser tubercle, although smaller, is more prominent than the greater tubercle: it is situated in front, and is directed medialward and forward. ... The tubercles of the humerus are separated from each other by a deep groove, the intertubercular groove (bicipital groove, sulcus intertubercular), which lodges the long tendon of the Biceps brachii and transmits a branch of the anterior humeral circumflex artery to the shoulder-joint. ... The body or shaft of the humerus is almost cylindrical in the upper half of its extent, prismatic and flattened below, and has three borders and three surfaces. ... The center of the lateral border of the humerus is traversed by a broad but shallow oblique depression, the radial sulcus (musculospiral groove, radial groove, spiral groove). ... The deltoid tuberosity is the region on the shaft of the humerus to which the the deltoid muscle attaches. ... The lower extremity of the humerus is flattened from before backward, and curved slightly forward; it ends below in a broad, articular surface, which is divided into two parts by a slight ridge. ... The lateral portion of the articular surface of the humerus consists of a smooth, rounded eminence, named the capitulum of the humerus; it articulates with the cupshaped depression on the head of the radius, and is limited to the front and lower part of the bone. ... The medial portion of the articular surface of the humerus is named the trochlea, and presents a deep depression between two well-marked borders; it is convex from before backward, concave from side to side, and occupies the anterior, lower, and posterior parts of the extremity. ... The lateral epicondyle of the humerus is a small, tuberculated eminence, curved a little forward, and giving attachment to the radial collateral ligament of the elbow-joint, and to a tendon common to the origin of the Supinator and some of the Extensor muscles. ... The medial epicondyle of the humerus, larger and more prominent than the lateral epicondyle, is directed a little backward. ... The lower part of the lateral border of the body of the humerus forms a prominent, rough margin, a little curved from behind forward, the lateral supracondylar ridge (or line), which presents an anterior lip for the origin of the Brachioradialis above, and Extensor carpi radialis longus below, a posterior... The inferior third of the medial border of the humerus is raised into a slight ridge, the medial supracondylar ridge (or medial supracondylar line), which becomes very prominent below; it presents an anterior lip for the origins of the Brachialis and Pronator teres, a posterior lip for the medial head... Above the front part of the capitulum is a slight depression, the radial fossa, which receives the anterior border of the head of the radius, when the forearm is flexed. ... Above the front part of the trochlea is a small depression, the coronoid fossa, which receives the coronoid process of the ulna during flexion of the forearm. ... Above the back part of the trochlea of the humerus is a deep triangular depression, the olecranon fossa, in which the summit of the olecranon is received in extension of the forearm. ... // The Human Forearm The forearm is the structure on the upper limb, between the elbow and the wrist. ... The ulna (Elbow Bone) [Figs. ... The upper extremity of the ulna (or proximal extremity) presents two curved processes, the olecranon and the coronoid process; and two concave, articular cavities, the semilunar and radial notches. ... ... The coronoid process is a triangular eminence projecting forward from the upper and front part of the ulna. ... At the junction of the antero-inferior surface of the coronoid process with the front of the body is a rough eminence, the tuberosity of the ulna (or ulnar tuberosity), which gives insertion to a part of the Brachialis; to the lateral border of this tuberosity the oblique cord is... The radial notch of the ulna (lesser sigmoid cavity) is a narrow, oblong, articular depression on the lateral side of the coronoid process; it receives the circumferential articular surface of the head of the radius. ... The semilunar notch of the ulna (trochlear notch of ulna, greater sigmoid cavity) is a large depression, formed by the olecranon and the coronoid process, and serving for articulation with the trochlea of the humerus. ... The body of the ulna at its upper part is prismatic in form, and curved so as to be convex behind and lateralward; its central part is straight; its lower part is rounded, smooth, and bent a little lateralward. ... The lower extremity of the ulna (or distal extremity) is small, and presents two eminences; the lateral and larger is a rounded, articular eminence, termed the head of the ulna; the medial, narrower and more projecting, is a non-articular eminence, the styloid process. ... The styloid process of the ulna projects from the medial and back part of the bone; it descends a little lower than the head, and its rounded end affords attachment to the ulnar collateral ligament of the wrist-joint. ... The radius is the bone of the forearm that extends from the outside of your limb to your phlangx (lateral) of the elbow to the thumb side of the wrist. ... The upper extremity of the radius (or proximal extremity) presents a head, neck, and tuberosity. ... Beneath the neck of the radius, on the medial side, is an eminence, the radial tuberosity; its surface is divided into: a posterior, rough portion, for the insertion of the tendon of the biceps brachii. ... The body of the radius (or shaft of radius) is prismoid in form, narrower above than below, and slightly curved, so as to be convex lateralward. ... The lower extremity of the radius is large, of quadrilateral form, and provided with two articular surfaces - one below, for the carpus, and another at the medial side, for the ulna. ... The articular surface for the ulna is called the ulnar notch (sigmoid cavity) of the radius; it is narrow, concave, smooth, and articulates with the head of the ulna. ... The lateral surface of the radius is prolonged obliquely downward into a strong, conical projection, the styloid process, which gives attachment by its base to the tendon of the Brachioradialis, and by its apex to the radial collateral ligament of the wrist-joint. ... For other uses, see Hand (disambiguation). ... This article is about Carpal bones. ... The lunate bone (os lunatum; semilunar bone) is a bone in the human hand that may be distinguished by its deep concavity and crescentic outline. ... The triquetral bone (also called triquetral, os triquetrum, cuneiform bone, pyramidal bone, cubital bone, os pyramidale, os triangulare, three-cornered bone, and triangular bone) is a type of carpal bone. ... The left pisiform bone. ... The trapezium is a bone in the human hand. ... In human anatomy, the trapezoid bone (lesser multangular bone; os multangulum minus) is a bone in the hands. ... The capitate bone (os capitatum; os magnum) is a bone in the human hand. ... The hamate bone (os hamatum; unciform bone) is a bone in the human hand that may be readily distinguished by its wedge-shaped form, and the hook-like process which projects from its volar surface. ... The volar surface of the hamate bone presents, at its lower and ulnar side, a curved, hook-like process, the hamulus, directed forward and lateralward. ... The metacarpus is the intermediate part of the hand skeleton that is located between the fingers distally and the carpus which forms the connection to the forearm. ... The first metacarpal bone (metacarpal bone of the thumb) which connects to the thumb is shorter and stouter than the others, diverges to a greater degree from the carpus, and its volar surface is directed toward the palm. ... The second metacarpal bone (metacarpal bone of the index finger) is the longest, and its base the largest, after the first metacarpal. ... The third metacarpal bone (metacarpal bone of the middle finger) is a little smaller than the second. ... The fourth metacarpal bone (metacarpal bone of the ring finger) is shorter and smaller than the third. ... The fifth metacarpal bone (metacarpal bone of the little finger) presents on its base one facet on its superior surface, which is concavo-convex and articulates with the hamate, and one on its radial side, which articulates with the fourth metacarpal. ... The Phalanges of the hand are fourteen in number, three for each finger, and two for the thumb. ...