humerus. ... two smooth articular surfaces (capitulum and trochlea
What does the humerus articulate with?
Humerus, long bone of the upper limb or forelimb of land vertebrates that forms the shoulder joint above, where it articulates with a lateral depression of the shoulder blade (glenoid cavity of scapula) , and the elbow joint below, where it articulates with projections of the ulna and the radius.
What structure articulates with the capitulum?
Anatomical terms of bone
In human anatomy of the arm, the capitulum of the humerus is a smooth, rounded eminence on the lateral portion of the distal articular surface 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.
Which bony feature does the capitulum of the humerus articulate with?
The lateral portion of the articular surface of 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.
Which part of the radius articulates with the capitulum of the humerus?
Immediately lateral to the trochlea is the capitulum (“small head”), a knob-like structure located on the anterior surface of the distal humerus. The capitulum articulates with the radius bone of the forearm. Just above these bony areas are two small depressions.
Which bone is the shortest in the forearm?
...the two bones of the forearm when viewed with the palm facing forward. All land vertebrates have this bone. In humans it is shorter than the other bone of the forearm, the ulna .
Where are condyles found?
A condyle (/ˈkɒndəl/ or /ˈkɒndaɪl/; Latin: condylus, from Greek: kondylos; κόνδυλος knuckle) is the round prominence at the end of a bone , most often part of a joint – an articulation with another bone. It is one of the markings or features of bones, and can refer to: On the femur, in the knee joint: Medial condyle.
What muscles attach to the humerus?
| Muscle Attachment | Pectoralis Major Upper Part of the Anterior Border | Triceps Brachii Lower Part of the Lateral Border Lateral Supracondylar Ridge | Brachioradialis Lateral Supracondylar Ridge | Extensor Carpi Radialis Longus Lateral Supracondylar Ridge |
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Why is the surgical neck of the humerus more likely to fracture?
As noted earlier, the surgical neck is the most frequent site of a humerus fracture in adults. Surgical neck fractures can result in abduction of the proximal fragment by the rotator cuff . Fractures between the pectoralis major and deltoid insertions result in adduction of the proximal fragment by the pectoralis.
Why is it called surgical neck of humerus?
The neck lies just below the head of the humerus. ... The anatomical neck is the portion that lies just below the head. As the neck continues along the humerus body, it is called the surgical neck (so named because this is the location of many fractures that require surgery ).
Which of the following bones does not articulate with the humerus?
The hyoid bone does not articulate with any other bone at all, it is held in place by cartilage.
What is the distal end of the humerus called?
The distal end of the humerus has two articular surfaces. The first of these, called the trochlea , is a pulley-shaped surface that accommodates the ulna. The other, called the capitulum, is a small spherical structure lateral to the trochlea that articulates with the head of the radius.
Which bone points toward the little finger?
The ulna is one of the two forearm bones and is on the small finger side of the forearm.
Is the humerus distal or proximal?
1 The top of the arm bone is called the proximal humerus , and the bottom of the bone is called the distal humerus. In between is the mid-shaft of the humerus.
What is the top part of the humerus called?
Proximal Landmarks
The upper end of the humerus consists of the head . This faces medially, upwards and backwards and is separated from the greater and lesser tuberosities by the anatomical neck. The greater tuberosity is located laterally on the humerus and has anterior and posterior surfaces.
Where is the head of the radius located?
The radius and ulna of the left forearm, posterior surface . The top is proximal (elbow) and bottom is distal (wrist). The head of the radius has a cylindrical form, and on its upper surface is a shallow cup or fovea for articulation with the capitulum of the humerus.
