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Humerus Bone – Posterior Markings

Posterior Markings of the Humerus Bone:

  1. image descriptionHead (Caput humeri) is a large, rounded, prominence that extends medially from the bone’s proximal end. It articulates with the glenoid fossa of the scapula to form the glenohumeral joint or shoulder joint.
Head of posterior humerus
Head of posterior humerus
Head of posterior humerus
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  1. image descriptionGreater Tubercle (Tuberculum majus) is a large, roughened area located lateral to the head. The supraspinatus, infraspinatus and teres minor muscles attach to this elevation.
Posterior Humerus
Greater Tubercle
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  1. image descriptionAnatomical Neck (Collum anatomicum) is a grooved constriction between the head and tubercles that serves as an attachment point for the articular (joint) capsule
Posterior Humerus
Anatomical Neck
Anatomical Neck
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  1. image descriptionSurgical Neck (Collum chirurgicum hu-meri) is an region inferior to the tubercles where the bone narrows and fractures often occur.
Posterior Humerus
Surgical Neck
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  1. image descriptionShaft or Body (corpus humeri) is the elongagted, cylinder shaped middle portion of the bone. Its relatively smooth surface is the insertion point for muscles that move the upper arm and the origin point for muscles that move the lower arm.
Posterior Humerus
Shaft or Body
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  1. image descriptionDeltoid Tuberosity (Tuberositas deltoidea) is a raised, roughened area located on the lateral side of the shaft at its midpoint. It is an attachment point for the deltoid muscle.
Posterior Humerus
Deltoid Tuberosity
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  1. image descriptionRadial groove or sulcus (Sulcus nervi) is a shallow depression that runs diagonally along the lateral posterior surface of the bone, next to the deltoid tuberosity. It forms a partial passageway for the radial nerve and deep brachial artery.
Posterior Humerus
Radial groove or sulcus
Radial groove or sulcus
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  1. image descriptionLateral Epicondyle (Epicondylus lateralis) is a rounded projection at the distolateral end of the humerus. The posterior surface of the lateral epicondyle serves as an attachment point for some of the muscles that extend the wrist and fingers of the hand.
Posterior Humerus
Lateral Epicondyle
Lateral Epicondyle
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  1. image descriptionLateral Supracondylar Ridge (Crista su-pracondylaris lateralis) is the roughened margin located above the lateral epicondyle. The brachioradialis muscle attaches along this portion of the bone.
Posterior Humerus
Lateral Supracondylar Ridge
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  1. image descriptionMedial Epicondyle (Epicondylus medialis) is a rounded projection at the distomedial end of the humerus. Some of the muscles that flex the forearm, wrist, and fingers attach to anterior surface of this marking.
Posterior Humerus
Medial Epicondyle
Medial Epicondyle
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  1. image descriptionTrochlea (Trochlea humeri) is a pulley-shaped formation located medial to the capitulum. This region articulates with the trochlear notch of the ulna bone at the elbow joint.
Posterior Humerus
Trochlea
Trochlea
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  1. image descriptionOlecranon fossa (Fossa olecrani) is a prominent, triagular-shape depression on the distal posterior surface, superior to the trochlea. This area accepts the olecranon process of the ulna when the forearm is extended.
Posterior Humerus
Olecranon fossa
Olecranon fossa
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