Term
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Definition
| an immovable joint. Such as the epiphyseal plate, sutures of the skull. |
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Term
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Definition
| a slightly moveable joint. Eaxamples are the pubic sympysis and the articulations between the bodies of the vertebrae. The stability of diarthrotic joints is inversely proportional to the freedom of movement. The more range of freedom the less stable it is. |
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Term
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Definition
| a freely moving joint. All diarthrotic joints are known as synovial joints since they all have an articular capsule lined by a synovial membrane and filled with synovial fluid. Examples include the knee, shoulder, hip, elbow, wrist, ankle, and superior and inferior articulating facets of vertebrae. |
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Term
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Definition
| bone surfaces slide across each other during the movement (carpals, tarsals, articulating surfaces of the vertebral processes). |
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Term
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Definition
| angular motion that occurs in a single plane (elbow and knee). |
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Term
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Definition
| rotational movement that occurs in one plane only (atlas-axis). |
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Term
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Definition
| round head of one bone sits in the cavity/fossa of another. permitting all combinations of movement. Greatest range of movement but least stable. (hip and shoulder). |
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Term
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Definition
| found outside the articular capsule, it is a flat pocket of synovial fluid that will develop as a result of frequent use of a joint and due to rubbing of a tendon or ligament over other tissues. Bursa protects against rubbing which could damage tissue under the tendon/ligament. Associated commonly with shoulder and knee joints. |
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Term
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Definition
| very similiar to bursa, except the sheath is shaped like a hot dog bun and wraps around a tendon as it passes over a bone. |
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Term
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Definition
| fibrocartilage pads found in the knee joint. They provide lateral stability and cushion the joint by conforming to the shape of the femur and tibia. |
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Term
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Definition
| while all the diarthrotic joints exhibit extrascapular ligaments, only the knee and hip joints exhibit ligaments that pass through the capsule. In the knee these are the anterior and posterior cruciate ligaments. They are called cruciate because they criss-cross each other. |
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Term
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Definition
| a lip of fibrocartilage that rims the articular cartilage found in the fossae or cavities. A typical example is found in the shoulder joint. It acts to deepen the fossa to increase the stability of ball and scket joints. |
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Term
| Source of synovial fluid. |
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Definition
| Source: the discontinous synovial membrane that lines the internal joint capsule produces the fluid. The membrance doesn't extend across the articular cartilage of the articulating bone. |
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Term
| Composition of articulating cartilage |
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Definition
| a fluid that contains glycoprotein known as lubricin along with water and nutrients. |
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