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Bones Of The Wrist

By Jayton Miller

Without the development of wrists in our skeletal structure we would basically be walking around like giant four legged spiders. Learn about the make-up of this crucial piece of the human body in today's article...

Contents:

Function Of The Wrist Bones:

The wrist lies at the end of the forearm and the beginning of the hand. It is a transition point that allows for flexibility of the hand relative to the rest of the arm for more intricate movement.

Structure Of The Bones Of The Wrist:

Structure Of The Wrist Bone

There are eight bones inside of the wrist that are about the size of a marble. Laid out in two rows of four they are as follows:

  • Distal Row: (closest to hand)
    • Hamate - Forms a joint with the lunate and triquetral bones of the proximal row.
    • Capitate - Largest of the carpal bones.
    • Trapezoid - Sits in between the scaphoid and second metacarpal (bone of the hand).
    • Trapezium - Shaped like a saddle to form a joint with the first metacarpal.
  • Proximal Row: (closest to forearm)
    • Triquetral - Forms a joint with the pisiform bone and the hamate bone.
    • Pisiform - Sits in a tendon of the flexor carpi ulnaris muscle.
    • Lunate - Forms a joint with the lower end of the radius (forearm bone).
    • Scaphoid - Has a skinny middle area that is commonly injured in wrist fractures.

Along with the bones of the wrist, there are a series of joints that are found in the wrist that help keep these bones in place. The wrist joint, also known as the radiocarpal joint, is a synovial joint. The joint is made up of three main areas:

  • The Lateral Area - This joint is on the same side as the thumb, and attaches the radius to the scaphoid.
  • The Middle Area - This joint connects the radius to the lunate bone in the wrist.
  • The Medial Area - This joint is on the same side as the pinky, and connects the articular disc to the triquetral bone.

Read More: How To Deal With And Alleviate Carpal Tunnel

Common Issues With The Bones Of The Wrist:

Common Issues With The Wrist

 

Common issues that occur with the bones of the wrist include:

  • Arthritis - There are different kind of arthritis but the most common in wrists is rheumatoid or osteoarthritis
  • Dislocation - Where the ends of bones become misaligned from the joint.
  • Carpal Tunnel - Happens when the median nerve is compressed in the wrist.
  • Ganglion Cysts - A non-cancerous lump that can form at the joint of the wrists.
  • Tendonitis - Inflammation of the tendons in the wrist.

Read More: 7 Amazing Benefits Of Collagen

Helpful Ways To Keep Your Wrists Healthy:

Helpful Ways To keep Wrists Healthy

Keeping your wrists healthy is extremely important, especially if you want to remain as independent and healthy as possible as you begin to age. Some of the best ways to keep your wrists healthy are:

  • Hand stretching
  • Resistance Training (especially forearm training using the wrist joint)
  • Stay at a healthy weight
  • Take steps to lower inflammation

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Conclusion:

The wrist is an important part of the human body, as well as many other species. It allows us to have more intricate movement of the hands and plays an important role in our development as the most dominant species on the planet.

For more articles like this make sure to check out the other articles we have on the human body such as “The Bones Of The Hand” and “The Knee Joint And Patella.”

Citations:

  • Abrahams, Peter. The Human Body: An Essential Guide To How The Body Works. Amber Books Ltd, 2021.