SIGMOID CAVITY OF THE RADIUS Meaning and
Definition
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The sigmoid cavity of the radius is a specific anatomical term that refers to a depression or concave area located on the lateral side of the proximal end of the radius bone in the forearm. The term "sigmoid" comes from the Greek word "sigma," meaning 'S,' which describes the shape of the cavity, resembling the Greek letter sigma (∑). This cavity articulates with the ulna bone, specifically with its sigmoid notch, forming a pivotal joint known as the radioulnar joint.
The sigmoid cavity of the radius plays a crucial role in forearm movement and stability. It allows for rotational movements between the radius and the ulna bone, enabling supination (rotating the forearm palm-up) and pronation (rotating the forearm palm-down) movements. These movements are vital for various everyday activities such as writing, gripping objects, and turning doorknobs.
Understanding the anatomical structures, such as the sigmoid cavity of the radius, is essential for medical professionals, especially orthopedic surgeons, radiologists, and anatomists, to diagnose and treat conditions involving the forearm, such as fractures, dislocations, and joint diseases. Additionally, knowledge of this anatomical structure is beneficial for physical therapists and occupational therapists in designing targeted rehabilitation programs for patients recovering from injuries or surgeries involving the forearm or wrist.
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A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.
Common Misspellings for SIGMOID CAVITY OF THE RADIUS
