Related Directory Categories
- Nonstandard Logics and Extensions (140)
- Extensions (97)
- Extensions (95)
- Extensions (90)
- Life Extension (87)
- Substructural Logics (53)
- Cooperative Extension (53)
- Linear Logic (49)
- Human Growth Hormone (46)
- Cooperative Extension System (33)
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Extension (kinesiology)
From Wikipedia, the free encyclopedia
Extension is a movement of a joint. For example, extension is produced by extending the flexed elbow. The arm is now straight; it has been extended. If the head is tilted all the way back, it is said to be extended.
The movement in the opposite directions is called flexion. Flexion decreases the angle between the bones of the limb at a joint, while extension increases it.
With the foot, extension (elevation) is usually called dorsiflexion.
If a part of the body is overstretched, then one speaks of a hyperextension (as with the knee).
In some anatomical muscle names, particularly with muscles of the forearm and the Cnemis, the term occurs explicitly as the second word in the Latin spelling of the name (for example, Musculus extensor carpi ulnaris).
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- of phalanges, at all joints
- Posterior compartment of the forearm
- Extensor digitorum
- Extensor carpi ulnaris
- Extensor digiti minimi (little finger only)
- Extensor indicis (index finger only)
- Posterior compartment of the forearm
- of thumb[4][5]
- Extensor pollicis brevis (proximal phalange)
- Extensor pollicis longus (distal phalange)
- ^ http://www.exrx.net/Articulations/Elbow.html#anchor764495
- ^ http://www.exrx.net/Articulations/Wrist.html#anchor261877
- ^ http://www.exrx.net/Articulations/Fingers.html#anchor783765
- ^ http://www.exrx.net/Articulations/Thumb.html#anchor206622
- ^ http://www.exrx.net/Articulations/Thumb.html#anchor210115
- ^ http://www.exrx.net/Articulations/Hip.html#anchor845621
- ^ http://www.exrx.net/Articulations/Knee.html#anchor22459
- ^ http://www.exrx.net/Articulations/Toes.html#anchor231444
- ^ http://www.exrx.net/Articulations/Toes.html#anchor235208
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This musculoskeletal system article is a stub. You can help Wikipedia by expanding it. |
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| Types of joints | Amphiarthrosis - Symphysis - Gomphosis - Synovial joint (Hinge joint, Pivot joint, Condyloid joint, Saddle joint, Ball and socket joint, Gliding joint) |
| Terminology | Kinesiology - Anatomical terms of motion - Agonist/Antagonist |
| Motions | Flexion/Extension - Adduction/Abduction - Internal rotation/External rotation - Supination/Pronation - Plantarflexion/Dorsiflexion - Eversion/Inversion - Elevation/Depression - Protraction/Retraction |