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Extension usually results in straightening of the bones or body surfaces involved. For example, extension is produced by extending the flexed (bent) elbow. Straightening of the arm would require extension at the elbow joint. If the head is tilted all the way back, the neck is said to be extended.
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Batsu. In Japanese culture, the batsu (literally: ×-mark) is a gesture made by crossing one's arms in the shape of an "X" in front of them in order to indicate that something is "wrong" or "no good". [36] Bras d'honneur is an obscene gesture made by flexing one elbow while gripping the inside of the bent arm with the opposite hand.
The extrinsic extensor muscles of the hand are located in the back of the forearm and have long tendons connecting them to bones in the hand, where they exert their action. Extrinsic denotes their location outside the hand. Extensor denotes their action which is to extend, or open flat, joints in the hand.
The extrinsic muscle groups are the long flexors and extensors. They are called extrinsic because the muscle belly is located on the forearm. The intrinsic group are the smaller muscles located within the hand itself. The muscles of the hand are innervated by the radial, median, and ulnar nerves from the brachial plexus. [1]
In the case of fingers and toes, it is bringing the digits together, towards the centerline of the hand or foot. Dropping the arms to the sides, and bringing the knees together, are examples of adduction. [15] Adduction of the wrist is also known as ulnar deviation which moves the hand towards the ulnar styloid (or, towards the little finger).
Fistmele - the measure of a clenched hand with the thumb extended; Gradus - Ancient Roman step; Hand - breadth of a human hand; Klafter - German measure of outstretched hands; League - the distance a person can walk in an hour (by one definition) Orgyia - Ancient Greek fathom; Parasang - the distance an infantryman could march in a predefined ...
The hand (Latin: manus), [5] the metacarpals (in the hand proper) and the phalanges of the fingers, form the metacarpophalangeal joints (MCP, including the knuckles) and interphalangeal joints (IP). Of the joints between the carpus and metacarpus, the carpometacarpal joints , only the saddle-shaped joint of the thumb offers a high degree of ...