Where are the first and second joints of the fingers?

Finger joints are usually not referred to as segments, but to the proximal or distal interphalangeal joints of the first fingers, such as the proximal interphalangeal joint of the index finger, which is the joint composed of the distal end of the proximal phalanx of the index finger and the base of the middle phalanx. The thumb has only one interphalangeal joint. The remaining fingers have proximal and distal interphalangeal joints.

The base of the proximal phalanx and the metacarpal head form the metacarpophalangeal joint, which is called the 1st to 5th metacarpophalangeal joints from the radial side to the ulnar side, respectively.

Summary. Is there a diagram of which part of the ring finger refers to the first, second, and third joints? : The fingers have 3 joints except the thumb.

The first, second, and third joints are the distal phalangeal joint, the middle phalangeal joint, and the metacarpophalangeal joint, respectively. This means that starting from the distal end of the finger and working towards the palm of the hand, the first, second, and third joints are respectively. The thumb has only knuckles and metacarpophalangeal joints.

Is there a diagram of which part of the ring finger refers to the first, second, and third joints?

Is there a diagram of which part of the ring finger socks clear the first, second, and third joints? : The fingers have 3 joints except the thumb.

1. Nuclear good luck.

The second and third joints are the distal phalangeal joint, the middle phalangeal joint, and the metacarpophalangeal joint. This means that starting from the distal end of the finger and working towards the palm of the hand, the first, second, and third joints are respectively. The thumb has only knuckle alteration and metacarpophalangeal joint.

There is a standard, that is, the heart is the center, the closest is the first, the proximal interphalangeal joint is the first interphalangeal joint, and the distal interphalangeal joint is the second interphalangeal joint.

Professionally, it is said that the metacarpophalangeal joint, the proximal interphalangeal joint and the distal interphalangeal joint are not first.

The theory of the first and second joints.

As shown in the figure below.

Anatomically, the top of the head is up and the feet are down.

In addition, the order of the five fingers is that the thumb is the first and the little finger is the fifth, so the first and second joints may be the joints of the thumb and index finger in addition to the joints between the fingers.

The anatomy involved is hard to explain.

I hope you understand.

P.S. I hope you can choose me as the answer hoho (I drew a picture myself, I'll just see it).

The thumb has two segments, the rest of the fingers have three segments, and the joint between the two fingers near the palm is called the proximal interphalangeal joint.

Any absence of three fingers beyond the proximal interphalangeal joint: defined as less than one finger or no finger at all in all three fingers (including the thumb);

or the absence of any four fingers of both hands except the thumb exceeds the proximal interphalangeal joint: this means that there is less than one finger left or no finger at all in all four fingers of both hands except the thumb.

From the perspective of basic training for beginners, there is only one most important ability that these two joints need to have: stability.

Stability, i.e. support. No matter how much gravity it bears, it keeps its natural arc unchanged.

When the metacarpal joint controls the finger to touch the key, the first.

First, the second joint should be stable and unshaped, so that the fingers can become a whole, and the force emitted by the metacarpal joint can reach the finger end, and will not be partially lost in the middle.

When the carpal tunnel is the main contact power part, the joints of these two fingers should also be stable, and the same reason is the same.

When the weight of the arm or even the whole body is added to the fingers, these two joints still have to be stable, and it is still based on the same principle that "Mount Tai does not bend over".

Hand Joints:

These include the radial carpal joint, the carpal interosseous joint, the metacarpophesal joint, the metacarpal joint, the metacarpophalangeal joint, and the interphalangeal joint.

Hand joint radial carpal joint: also known as wrist joint, composition: articular head - proximal articular surface of the scaphoid bone, lunate and triangular bone; Articular fossa - the articular surface of the carpal articular surface of the radius and the articular disc below the ulnar head. Characteristics: The joint capsule is relaxed, and the ligaments are strengthened anteriorly, anteriorly, and on both sides.

As shown in the figure below. Anatomically, the top of the head is up and the feet are down.

In addition, the order of the five fingers is that the thumb is the first and the little finger is the fifth, so the first and second joints may be the joints of the thumb and index finger in addition to the joints between the fingers.

The anatomy involved is hard to explain.

I hope you understand.

P.S. I hope you can choose me as the answer hoho (I drew a picture myself, I'll just see it).