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If the fingers of the right hand are curled in the direction of the circular component of the current, the right thumb points to the north pole. Lorentz force: If an electric charge moves across a magnetic field, it experiences a force according to the Lorentz force, with the direction given by the right-hand rule. If the index finger ...
The thumb is the first digit of the hand, next to the index finger. [A] When a person is standing in the medical anatomical position (where the palm is facing to the front), the thumb is the outermost digit. The Medical Latin English noun for thumb is pollex (compare hallux for big toe), and the corresponding adjective for thumb is pollical.
Brachydactyly type D, also known as short thumb, [3] [1] stub thumb, [5] [6] or clubbed thumb, [5] [6] is a genetic trait recognised by a thumb being relatively short and round with an accompanying wider nail bed. The distal phalanx of such thumbs is approximately two-thirds the length of full-length thumbs.
The muscles of the thumb are nine skeletal muscles located in the hand and forearm. The muscles allow for flexion , extension , adduction , abduction and opposition of the thumb . The muscles acting on the thumb can be divided into two groups: The extrinsic hand muscles, with their muscle bellies located in the forearm, and the intrinsic hand ...
Here, in the four-finger system, as well as in common English, the first finger refers to the index finger (the finger next to the thumb). [ 3 ] [ 4 ] This designation carries over in a musical context when referencing the playing of stringed instruments (such as the guitar), [ 5 ] woodwind instruments (such as flutes, pipes, or piccolos), and ...
A thumb signal, usually described as a thumbs-up or thumbs-down, is a common hand gesture achieved by a closed fist held with the thumb extended upward or downward, respectively. The thumbs-up gesture is associated with positivity, approval, achievement, satisfaction and solidarity, while the thumbs-down gesture is associated with concern ...
Historicopous, trigger digit, trigger thumb, [1] stenosing tenosynovitis [1] An example of trigger finger affecting the ring finger: Specialty: Hand surgery, orthopedic surgery, and plastic surgery: Symptoms: Catching or locking of the involved finger, pain [2] [3] Usual onset: 50s to 60s years old [2] Risk factors: Generally idiopathic ...
Gamekeeper's thumb and skier's thumb are two similar conditions, both of which involve insufficiency of the ulnar collateral ligament (UCL) of the thumb. The chief difference between these two conditions is that skier's thumb is generally considered to be an acute condition acquired after a fall or similar abduction injury to the metacarpophalangeal (MCP) joint of the thumb, whereas gamekeeper ...