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The radius is the somewhat more strongly developed bone of the forearm and lies approximately parallel to the ulna. With its long, narrow shape it belongs to the tubular bones. The radius is divided into the shaft (Corpus radii), one extremity proximal and one extremity distal. | The radius is the somewhat more strongly developed bone of the forearm and lies approximately parallel to the ulna. With its long, narrow shape it belongs to the tubular bones. The radius is divided into the shaft (Corpus radii), one extremity proximal and one extremity distal. | ||
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| − | + | At the proximal extremity there is the caput radii with the fovea articularis. The fovea articularis is a plate-shaped socket, which is framed by the Circumferentia articularis. This is where the connection to the humerus is located. Distally of the head of the ulna is the place with the smallest diameter, the collum radii. At the transition between collum radii and corpus radii, the tuberosity radii is located medially. | |
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Version vom 26. Mai 2020, 13:28 Uhr
The radial bone (lat. radius) is one of the two bones of the forearm. It belongs to the tubular bones and runs approximately parallel to the ulna. The spoke is located on the thumb side of the forearm.
Inhaltsverzeichnis
Anatomie
<lightbox-Einbettung src="file:RadiusVentral.png" group="image-group-1" caption="Ansicht des Radius (Ventral)"/><lightbox-Einbettung src="file:RadiusDistal. png" group="image-group-1" caption="Anatomy of the radius (ventral)"/> 
The radius is the somewhat more strongly developed bone of the forearm and lies approximately parallel to the ulna. With its long, narrow shape it belongs to the tubular bones. The radius is divided into the shaft (Corpus radii), one extremity proximal and one extremity distal.
Proximal end
At the proximal extremity there is the caput radii with the fovea articularis. The fovea articularis is a plate-shaped socket, which is framed by the Circumferentia articularis. This is where the connection to the humerus is located. Distally of the head of the ulna is the place with the smallest diameter, the collum radii. At the transition between collum radii and corpus radii, the tuberosity radii is located medially.
The radius can be divided into the shaft, corpus radii (1), one extremitas proximalis and one extremitas distalis. The Caput radii (2) with the Fovea articularis (3) is located at the Extremitas proximalis. Medially located at the transition between Collum radii (4) and Corpus radii is the Tuberositas radii (5).
Funktion
Der Radius bildet zusammen mit der Ulna eine funktionelle Einheit. Die beiden Knochen bilden die knöcherne Grundstruktur des Unterarmes und geben ihm Stabilität. Der Radius ist zusammen mit der Elle an den Bewegungen des Unterarmes und der Hand beteiligt.
Entwicklung
Der Radius-Schaft beginnt bereits in der siebten Embryonalwoche mit der perichonralen Verknöcherung. Die distale Epiphyse dagegen wird bis zum zweiten Lebensjahr und die proximale sogar bis zum siebten Lebensjahr gebildet. Zwischen dem 14. und 17. Lebensjahres findet der vollständige Verschluss der Epiphysenfugen statt.
