- See:
-
Blood Supply to the Humerus:
-
Fractures of the Humerus:
-
Anatomy:
- ossification centers
- humeral head
- 3 months
- greater tuberosity
- 3 years
- lesser tuberosity
- 5 years
- proximal humeral epiphysis:
- fuses by 21 years
- contribute 80% of longitudinal growth
-
epiphyseal plate:
- irregularly
cone shaped with apex pointing superiorly,
posteriorly and medially in relationship to shaft
- configuration interlocks physis and metaphysis at the plate.
- position of apex tends to resist axial and posterior forces.
- thickened periosteum anchors head and tuberosities to shaft
- anterior periosteum is thinner and weaker
- posterior periosteum is thicker
- ensures adequate
blood supply to head by secure
fixation to physis;
- Major rays of Trabeculae:
- medial ray:
- passes into inferomedial aspect of head
- assists in resisting deformation by static loading
- lateral ray:
- passes vertically to tuberosity with second ray passing to
superolateral aspect of head.
- asists to resist static loading
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The arterial vascularization of the humeral head. An anatomical study.
