Eshealthtips.com – There are several Hand Finger Joint Names. These names refer to the joints between bones in the fingers and the hand. The bones of the thumb and finger are similar. Their interphalangeal joints are located near the tip of the finger, just before the fingernail begins. The thumb’s interphalangeal joint is formed by the terminal extensor tendon of the extensor pollicis longus muscle. Moreover, there is a radial and ulnar collateral ligament that provides stability to the fingertip during pinching.
Joints Formed by Combination of Bones
These bones are important for understanding various hand injuries and broken fingers. These joints are formed by a combination of bones, tendons, and ligaments. These bones allow for a wide range of motion. The hand consists of several bones, including the hamate, capitate, trapezoid, and phalange. Each finger has three bones, including a middle phalanx and a distal phalanx. The thumb, however, only has one middle phalanx.
The Interphalangeal Joint the PIP joint connects the middle and proximal phalanx. The joint is connected to the volar plate, which tightens to prevent the PIP joint from bending backward. In addition, the ulnar and radioulnar ligaments provide main support for the wrist. Listed below are the different Hand Finger Joint Names:
The MP and MCP joints are important for power gripping and pinching. They allow the finger to move, spread, and bring together. Straightened fingers spread farther than bent fingers, and collateral ligaments in these joints are easily injured. Affected MCP and PIP joints are commonly called boxer’s fracture. Another common hand injury involves dislocation of the PIP joint. When a finger bends too far, the bone dislocates from the joint.
The Most Important Joints in the Hands and Fingers
Another common Hand Finger Joint Name is Tenosynovium. This joint is the most important joint in the hand and finger. It connects the bones of the hand and the palm. When damaged, it results in inflammation and swelling of the tendons. Some types of arthritis may also limit an individual’s ability to perform everyday activities. Hand pain, especially in the fingers, can interfere with daily tasks. Fortunately, there are treatments for this condition.
There are fourteen major hand joints. Each one has a different name. In addition to the extensor digitorum, extensor pollicis, hypothenar, and abductor pollicis are also common. These joints provide support and mobility to the hand. However, there are also some joints that do not have their own names. They are the Extensor Carpi Radialis, Flexor Carpi Radialis, and Thumb.
The PIP joint has a volar plate, which is the strongest ligament between two bones. It tightens when the palmar phalanx bends backward, preventing the PIP joint from hyperextending. If it loosens, finger deformities may occur. These ligaments provide stability and prevent the fingers from becoming twisted. The Volar Plate is the most significant ligament in the PIP joint. These ligaments also help prevent excessive bending of the PIP joint.
The Extensor Tendons in the Hand Provide Strength
The extensor tendons in the hand provide the power to straighten and pinch the fingers. These tendons begin on the backside of the forearm and travel down the forearm, across the wrist, and connect to the middle and distal phalanges of the fingers. These tendons form an extensor hood on the top of the finger, while branches branch out on the sides. They are responsible for holding and positioning the hand and wrist.
The Interossei group of muscles consists of 3 volar and four dorsal muscles. All three are innervated by the ulnar nerve. They originate at the metacarpal bones and form lateral bands with lumbricals. The dorsal interossei abduct and adduct the fingers in the hand. These two groups are responsible for the flexion and extension of the fingers.
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GISLASON, Magnus K.; STANSFIELD, Benedict; NASH, David H. Finite element model creation and stability considerations of complex biological articulation: the human wrist joint. Medical engineering & physics, 2010, 32.5: 523-531.