Joint capsule
| Joint capsule | |
|---|---|
 Typical joint | |
 Diagrammatic section of a diarthrodial joint. | |
| Details | |
| Identifiers | |
| Latin | capsula articularis |
| TA98 | Lua error in Module:Wikidata at line 746: attempt to index field 'wikibase' (a nil value). |
| TH | {{#property:P1694}} |
| TE | {{#property:P1693}} |
| FMA | {{#property:P1402}} |
| Anatomical terminology [[[d:Lua error in Module:Wikidata at line 865: attempt to index field 'wikibase' (a nil value).|edit on Wikidata]]] | |
In anatomy, a joint capsule or articular capsule is an envelope surrounding a synovial joint.[1] Each joint capsule has two parts: an outer fibrous layer or membrane, and an inner synovial layer or membrane.
Membranes
[edit | edit source]Each capsule consists of two layers or membranes:
- an outer (fibrous membrane, fibrous stratum) composed of avascular white fibrous tissue
- an inner (synovial membrane, synovial stratum) which is a secreting layer
On the inside of the capsule, articular cartilage covers the end surfaces of the bones that articulate within that joint.
The outer layer is highly innervated by the same nerves which perforate through the adjacent muscles associated with the joint.
Fibrous membrane
[edit | edit source]The fibrous membrane of the joint capsule is attached to the whole circumference of the articular end of each bone entering into the joint, and thus entirely surrounds the articulation. It is made up of dense connective tissue. It's a long spongy tissue.
Clinical significance
[edit | edit source]Frozen shoulder (adhesive capsulitis) is a disorder in which the shoulder capsule becomes inflamed.
Plica syndrome is a disorder in which the synovial plica becomes inflamed and causes abnormal biomechanics in the knee.
Gallery
[edit | edit source]-
Left clavicle. Inferior surface. -
Right hip bone. External surface. -
Right knee in extension. Deep dissection. Posterior view. -
Right knee in extension. Deep dissection. Posterior view.
See also
[edit | edit source]- Articular capsule of the humerus
- Articular capsule of the knee joint
- Atlanto-axial joint
- Capsule of atlantooccipital articulation
- Capsule of hip joint
- Capsule of temporomandibular joint
References
[edit | edit source]Error creating thumbnail: This article incorporates text in the public domain from the 20th edition of Gray's Anatomy (1918)
- ^ eMedicine/Stedman Medical Dictionary Lookup! Archived 2008-04-12 at the Wayback Machine
External links
[edit | edit source]- Cross section image: pelvis/pelvis-e12-15—Plastination Laboratory at the Medical University of Vienna
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