Ball and socket joint

Ball and socket joint

Infobox Anatomy
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Latin = articulatio spheroidea
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GrayPage = 287



Caption = 1: Ball and socket joint; 2: Condyloid joint (Ellipsoid); 3: Saddle joint; 4 Hinge joint; 5: Pivot joint;



Caption2 = Capsule of shoulder-joint (distended). Anterior aspect.
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DorlandsPre = a_64
DorlandsSuf = 12161549
A ball and socket joint (enarthrosis, spheroidal joint) is a joint in which the distal bone is capable of motion around an indefinite number of axes, which have one common center.It helps the bone to move in a 360° angle.

In a ball and socket (or spheroid) joint, the ball-shaped surface of one bone fits into the cuplike depression of another.

The ball and socket joint is a movable joint, that consists of one bone that is rounded and that fits within a cuplike bone.

Movements

Movements possible are flexion-extension, abduction-adduction, rotation (triaxial) and circumduction.

Examples

Examples of this form of articulation are found in the hip and shoulder. [ [http://anatomy.med.umich.edu/modules/joints_module/joints_20.html Module - Introduction to Joints ] ]

References


=Additional


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Look at other dictionaries:

  • Ball and socket joint — Ball Ball (b[add]l), n. [OE. bal, balle; akin to OHG. balla, palla, G. ball, Icel. b[ o]llr, ball; cf. F. balle. Cf. 1st {Bale}, n., {Pallmall}.] 1. Any round or roundish body or mass; a sphere or globe; as, a ball of twine; a ball of snow. [1913 …   The Collaborative International Dictionary of English

  • ball-and-socket joint — [bôl΄ən säk′it] n. a joint, as that of the hip or shoulder, formed by a ball in a socket, allowing limited movement in any direction …   English World dictionary

  • ball-and-socket joint — ► NOUN ▪ a joint in which a rounded end lies in a socket, allowing movement in all directions …   English terms dictionary

  • ball-and-socket joint — noun 1. a freely moving joint in which a sphere on the head of one bone fits into a rounded cavity in the other bone • Syn: ↑spheroid joint, ↑cotyloid joint, ↑enarthrodial joint, ↑enarthrosis, ↑articulatio spheroidea • Hypernyms: ↑synovial joint …   Useful english dictionary

  • Ball-and-socket joint — A ball and socket joint is one in which the round end of a bone fits into the cavity of another bone. The hip joint is a ball and socket joint. * * * ball and socket joint n an articulation (as the hip joint) in which the rounded head of one bone …   Medical dictionary

  • ball-and-socket joint — UK / US noun [countable] Word forms ball and socket joint : singular ball and socket joint plural ball and socket joints medical a joint in your body where the end of a bone that is curved outwards meets the end of a bone that is curved inwards… …   English dictionary

  • ball-and-socket joint — rutulinis lankstas statusas T sritis automatika atitikmenys: angl. ball and socket joint vok. Kugelgelenk, n rus. шаровой шарнир, m pranc. joint à rotule, m …   Automatikos terminų žodynas

  • ball-and-socket joint — ball′ and sock′et joint n. 1) anat. Also called enarthrosis an anatomical joint in which the rounded end of one bone fits into a cuplike end of the other bone, as at the hip or shoulder. 2) anat. mac Also called ball joint a similar mechanical… …   From formal English to slang

  • ball-and-socket joint — /bawl euhn sok it/ 1. Also called enarthrosis. Anat., Zool. a joint in which the rounded end of one bone fits into a cuplike end of the other bone, allowing for relatively free rotary motion, as at the hip or shoulder. 2. Also called ball joint.… …   Universalium

  • ball-and-socket joint — noun Date: 1809 1. a joint in which a ball moves within a socket so as to allow rotary motion in every direction within certain limits 2. an articulation (as the hip joint) in which the rounded head of one bone fits into a cuplike cavity of the… …   New Collegiate Dictionary

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