Deltoid tuberosity
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| Deltoid tuberosity | |
|---|---|
Left humerus. Anterior view. (Deltoideus labeled at center right.)
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| Details | |
| Latin | tuberositas deltoidea humeri |
| Identifiers | |
| Dorlands /Elsevier |
t_21/12829141 |
| TA | Lua error in Module:Wikidata at line 744: attempt to index field 'wikibase' (a nil value). |
| TH | {{#property:P1694}} |
| TE | {{#property:P1693}} |
| FMA | {{#property:P1402}} |
| Anatomical terms of bone
[[[d:Lua error in Module:Wikidata at line 863: attempt to index field 'wikibase' (a nil value).|edit on Wikidata]]]
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In human anatomy, the deltoid tuberosity is a rough, triangular[1] area on the anterolateral (front-side) surface of the middle of the humerus to which the deltoid muscle attaches. [2]
Variation
It has been reported as very prominent in less than 10% of cases. [3]
Development
The deltoid tuberosity develops through endochondral ossification in a two-phase process. The initiating signal is tendon-dependent, whilst the growth phase is muscle-dependent. [4]
Evolutionary variation
In mammals, the humerus displays a wide morphological variation. The size and orientation of its functionally important features, including the deltoid tubercle, greater tubercle, and medial epicondyle, are pivotal to an animal's style of locomotion and habitat. In cursorial (running) animals such as the pronghorn, the deltoid tubercle is located about a quarter of the way down the shaft, which allows for rapid but relatively weak limb flexion and extension. In natatorial (swimming) animals such as the North American river otter, the tubercle is located nearly halfway down the shaft, which allows for powerful limb flexion and extension. The tuberosity can be very pronounced in fossorial (digging) animals, such as the mountain beaver. [5]
See also
- Deltoid tubercle (on clavicle)
References
- ↑ Lua error in package.lua at line 80: module 'strict' not found. (See link in infobox.)
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found. (Including an illustration of variation in mammalian humeri.)
