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The fourth finger refers to the ring finger (or fourth digit) in a medical context, [1] or in a musical context when referring to keyboard instruments. [2] The fifth finger refers to the pinky finger (or fifth digit) in a medical context, [1] or in a musical context when referring to keyboard instruments. [2]
A hand imitating an ulnar claw. The metacarpophalangeal joints of the 4th and 5th fingers are extended and the Interphalangeal joints of the same fingers are flexed.. An ulnar claw, also known as claw hand or ‘Spinster’s Claw’, is a deformity or an abnormal attitude of the hand that develops due to ulnar nerve damage causing paralysis of the lumbricals.
The medial aspect of the muscle (which flexes the 4th and 5th digit) is supplied by the ulnar nerve (C8, T1). [ 5 ] [ 6 ] [ 7 ] The lateral aspect (which flexes the 2nd and 3rd digit) is innervated by the median nerve , [ 5 ] [ 7 ] [ 8 ] specifically the anterior interosseous branch (C8, T1).
Many people complain of sensory changes in the fourth and fifth digits. Rarely, an individual actually notices that the unusual sensations are mainly in the medial side of the ring finger (fourth digit). Sometimes the third digit is also involved, especially on the ulnar side.
This pulls the distal interphalangeal joints of the 4th and 5th digit into a more flexed position, producing a more deformed 'claw'. This is known as the ulnar paradox. Weakness of adduction of the thumb, which may be assessed by the presence of Froment's sign.
Recently a Jurassic theropod intermediate fossil Limusaurus has been found in the Junggar Basin in western China that has a complex mix: it has a first digit stub and full second, third and fourth digits but its wrist bones are like those that are associated with the second, third and fourth digits while its finger bones are those of the first ...
The digit ratio is a pseudoscience involving the ratio taken of the lengths of different digits or fingers on a hand. The most commonly studied digit ratio is that of the 2nd (index finger) and 4th (ring finger), also referred to as the 2D:4D ratio, measured on the palm side.
The ring finger, third finger, [1] fourth finger, [2] [3] leech finger, [4] or annulary is the fourth digit of the human hand, located between the middle finger and the little finger. [ 5 ] Sometimes the term ring finger only refers to the fourth digit of a left-hand , so named for its traditional association with wedding rings in many ...