Humerus
The humerus is the single bone of the upper arm. It belongs to the so-called long bones, which means it has two distinguishable ends – the proximal and distal epiphyses. Both epiphyses are involved in bone growth up to the age of the ossification of epiphysial cartilage. The portion of the bone between these ends is called the diaphysis. Any long bone has two epiphyses and one diaphysis.
Proximally the humerus articulates with the scapula, but distally with two bones of the lower arm – the ulna and radius.
Unlike many other bones, the humerus has two necks: the anatomical and surgical neck. The anatomical neck corresponds to the epiphysial cartilage localization, while the surgical – corresponds to the place where the humerus fractures most frequently occur.
The list of terms:
Epiphysis proximalis humeri – Prooximal epiphysis of humerusDiaphysis humeri – Diaphysis of humerus
Epiphysis distalis humeri – Distal epiphysis of humerus
Corpus humeri – Body of humerus
Caput humeri – Head of humerus
Collum anatomicum – Anatomical neck
Collum chirurgicum – Surgical neck
Tuberculum majus – Greater tubercle
Tuberculum minus – Lesser tubercle
Sulcus intertubercularis – Intertubercular groove
Crista tuberculi majoris – Crest of greater tubercle
Crista tuberculi minoris – Crest of lesser tubercle
Tuberositas deltoidea – Deltoid tuberosity
Margo lateralis – Lateral margin
Margo medialis – Medial margin
Facies anterior lateralis – Anterolateral surface
Facies anterior medialis – Anteromedial surface
Crista supracondylaris lateralis – Lateral supracondylar ridge
Crista supracondylaris medialis – Medial supracondylar ridge
Condylus humeri – Condyle of humerus
Capitulum humeri – Capitulum of humerus
Fossa radialis – Radial fossa
Trochlea humeri – Trochlea oof humerus
Fossa coronoidea – Coronoid fossa
Epicondylus lateralis – Lateral epycondyle
Epicondylus medialis – Medial epicondyle
Another tricky term you may find in here is the condyle of the humerus. It includes the articular surfaces for the ulna and radius, and the fossas necessary to fit these bones at the full flexion and extension of the lower arm.
The list of terms:
Epiphysis proximalis humeri – Prooximal epiphysis of humerusDiaphysis humeri – Diaphysis of humerus
Epiphysis distalis humeri – Distal epiphysis of humerus
Corpus humeri – Body of humerus
Caput humeri – Head of humerus
Collum anatomicum – Anatomical neck
Collum chirurgicum – Surgical neck
Tuberculum majus – Greater tubercle
Tuberositas deltoidea – Deltoid tuberosity
Facies posterior – Posterior surface
Sulcus nervi radialis – Groove for radial nerve
Crista supracondylaris lateralis – Lateral supracondylar ridge
Crista supracondylaris medialis – Medial supracondylar ridge
Condylus humeri – Condyle of humerus
Trochlea humeri – Trochlea oof humerus
Fossa olecrani – Olecranon fossa
Epicondylus lateralis – Lateral epycondyle
Epicondylus medialis – Medial epicondyle
Sulcus nervi ulnaris – Groove for the ulnar nerve
Last update: 28/Nov/2020