Thumb Anatomy
Injuries to the fingers and thumb are a common reason for visits to primary care clinics and emergency departments. Adequate strength forms the basis for normal hand function.
What Peculiarities Of The Anatomy Of Hands Should Be Taken
The medical latin english noun for thumb is pollex compare hallux for big toe and the corresponding adjective for thumb is pollical.
Thumb anatomy. It differs from other digits in having only two phalanges tubular bones of the fingers and toes. The thumb possesses a unique and wide range of motion not shared by the hands other digits. There are four thumb tendons.
This tendon helps you bend the thumb. Few structures of the human anatomy are as unique as the hand. Did you know that the tendons attached to your thumb run all the way up your forearm.
This article discusses the ligamentous structures of the metacarpophalangeal mp joints see the first image below proximal interphalangeal pip joints and distal interphalangeal dip joints. The hand needs to be mobile in order to position the fingers and thumb. This tendon helps you move the thumb away from the palm to form an open hand.
Additionally the thumb has 2 joints that will be discussed here the mp joint and the interphalangeal ip joint see the second image below. This tendon travels along the back of the thumb and helps straighten the thumb. The thumb is the first digit finger of the handalthough your thumb is not actually a finger people still classify it as one.
To care for such injuries well clinicians must have a sound grasp of basic hand anatomy. 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 thumb also differs in having much freedom of movement and being opposable to tips of other digits.
Thumb short thick first digit of the human hand and of the lower primate hand and foot. The thumb is the first of the hands five digits but it is typically not referred to as a finger.
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