| wrist joint | |
|---|---|
 |
|
| A human wrist. | |
| Latin | articulatio radiocarpalis |
| Gray's | subject #86 327 |
| MeSH | Wrist+joint |
| Dorlands/Elsevier | a_64/12161475 |
In human anatomy, the wrist is the flexible and narrower connection between the forearm and the palm. Latin ( lingua Latīna, laˈtiːna is an Italic language, historically spoken in Latium and Ancient Rome. Introduction ( Joints or Articulations Sutural ligament Fibrocartilages Medical Subject Headings ( MeSH) is a huge Controlled vocabulary (or metadata system for the purpose of indexing journal articles and books Elsevier, the world's largest Publisher of Medical and Scientific literature, forms part of the Reed Elsevier group Human anatomy, which with physiology and biochemistry is a complementary basic medical science is primarily the scientific study of the morphology of the adult Human body The forearm is the structure on the Upper limb, between the elbow and the Wrist. The hands ( med / lat: manus pl manūs are the two intricate prehensile multi- Fingered body parts normally located at the end of each arm of a The wrist is essentially a double row of small short bones, called carpals, intertwined to form a malleable hinge. Where a part of the skeleton is intended for strength and compactness his kaka combined with limited movement it is constructed of a number of short bones, as in the Carpus In Tetrapods the carpus is the sole cluster of the Bones in the Wrist between the radius and Ulna and the Metacarpus
The wrist-joint (articulatio radiocarpea) is a condyloid articulation allowing three degrees of freedom. In a condyloid joint ( condyloid articulation, ellipsoidal joint) an Ovoid Articular surface or Condyle, is received into an elliptical
Contents |
Structure of joint
The parts forming it are the lower end of the radius and under surface of the articular disk above; and the scaphoid, lunate, and triquetral bones below. The radius is the Bone of the Forearm that extends from the lateral side of the elbow to the Thumb side of the Wrist. The articular disk (or disc) is a thin oval plate of Fibrocartilage present in several Joints which separates synovial cavities The scaphoid bone (hand navicular of the Wrist is found on the Thumb side of the hand within the Anatomical snuffbox. The lunate bone ( semilunar bone) is a Carpal bone (wrist bone in the Human Hand that may be distinguished by its deep concavity and crescentic The triquetral bone (also called triquetrum bone, cuneiform bone, pyramidal bone, cubital bone, three-cornered bone, and triangular
The articular surface of the radius and the under surface of the articular disk form together a transversely elliptical concave surface, the receiving cavity. The articular disk (or disc) is a thin oval plate of Fibrocartilage present in several Joints which separates synovial cavities
The superior articular surfaces of the scaphoid, lunate, and triquetrum form a smooth convex surface, the condyle, which is received into the concavity.
The bones of the wrist can be easily remembered by the mnemonic SLTPTTCH - Some Lovers Try Positions That They Can't Handle. A mnemonic device (nəˈmɒnɪk is a Memory aid Commonly met mnemonics are often verbal something such as a very short poem or a special word used to help a person remember These represent the bones in order of proximal row radial to ulnar and then distal row radial to ulnar: Scaphoid, Lunate, Triquetral, Pisiform; Trapezium, Trapezoid, Capitate, Hamate.
Ligaments
The joint is surrounded by a capsule, strengthened by the following ligaments:
- Palmar radiocarpal ligament
- Dorsal radiocarpal ligament
- Ulnar collateral ligament (wrist)
- Radial collateral ligament (wrist)
The synovial membrane lines the deep surfaces of the ligaments above described, extending from the margin of the lower end of the radius and articular disk above to the margins of the articular surfaces of the carpal bones below. In Anatomy, the term ligament is used to denote three different types of structures Fibrous tissue that connects Bones to other bones The palmar radiocarpal ligament ( anterior ligament, volar radiocarpal ligament) is a broad membranous band attached above to the anterior margin of the lower end The dorsal radiocarpal ligament ( posterior ligament) less thick and strong than the volar is attached above to the posterior border of the lower end of the radius its fibers The ulnar collateral ligament ( internal lateral ligament, ulnar carpal collateral ligament) is a rounded cord attached above to the end of the styloid process The radial collateral carpal ligament attaches to the styloid process of the radius and the radial side of the Scaphoid bone. Synovial membrane (or synovium) is the soft tissue that lines the non- cartilaginous surfaces within Joints with cavities ( Synovial joints It is loose and lax, and presents numerous folds, especially behind. The phalanges are made up of 14 of the 27 bones.
Movements
The movements permitted in this joint are flexion, extension, abduction, adduction, and circumduction. In fields of Anatomy, anatomical terms of location are descriptive terms to help identify relative positions or directions within a species In Anatomy, flexion is a position that is made possible by the joint angle decreasing In fields of Anatomy, anatomical terms of location are descriptive terms to help identify relative positions or directions within a species Adduction is a movement which brings a limb — Arm or Leg — closer to the sagittal plane of the body They are studied with those of the carpus, with which they are combined. In Tetrapods the carpus is the sole cluster of the Bones in the Wrist between the radius and Ulna and the Metacarpus
See also
- Distal radius fracture
- Brunelli Procedure, related to instability in the wrist
Additional images
 Right Human Posterior Distal Radius, Ulna, Carpals |
 Right Human Anterior Distal Radius, Ulna, Carpals |
 Carpus |
 Ligaments of wrist. A distal radius fracture is a common bone fracture of the radius in the forearm The Brunelli Procedure is a surgical procedure that can be used to correct instability in the Wrist. Anterior view |
 Ligaments of wrist. Posterior view. |
References
External links
- Wrist ligaments at upenn.edu
- wrist at eMedicine Dictionary
- wrist+joint at eMedicine Dictionary
- Hand kinesiology at UK bone/wrist.html
Dapyx Software network: MP3 Explorer | Ebook Manager | Zenithic