Your wrist is made up of eight small bones (carpal bones) plus two long bones in your forearm — the radius and the ulna. Each finger consists of one hand bone (metacarpal) and three finger bones (phalanges), while each thumb consists of one metacarpal bone and two phalanges.

What are the bones of the wrist in order?

The proximal row of carpal bones (moving from radial to ulnar) are the scaphoid, lunate, triquetrum, and pisiform, while the distal row of carpal bones (also from radial to ulnar) comprises the trapezium, trapezoid, capitate, and hamate.

What are the three bones in the wrist?

It is actually a collection of multiple bones and joints. The bones comprising the wrist include the distal ends of the radius and ulna, 8 carpal bones, and the proximal portions of the 5 metacarpal bones (see the images below).

What is the most important bone in your wrist?

The scaphoid bone is one of the carpal bones on the thumb side of the wrist, just above the radius. The bone is important for both motion and stability in the wrist joint.

What is the bone on side of wrist called?

The carpus is formed from eight small bones collectively referred to as the carpal bones. The carpal bones are bound in two groups of four bones: the pisiform, triquetrum, lunate and scaphoid on the upper end of the wrist. the hamate, capitate, trapezoid and trapezium on the lower side of the hand.

What are the 8 bones of the wrist?

There are eight wrist bones, including the scaphoid bone, which is often fractured.

• Scaphoid. The scaphoid is a bone in the wrist.
• Lunate. The lunate is a bone in the middle of the wrist in the first row of wrist bones.
• Triquetrum.
• Trapezoid.
• Trapezium.
• Capitate.
• Hamate.
• Pisiform.

How can I remember my wrist bones?

A useful mnemonic to help remember the carpal bones is shown below:

1. Some – Scaphoid.
2. Lovers – Lunate.
3. Try – Triquetrum.
4. Positions – Pisiform.
5. That – Trapezium.
6. They – Trapezoid.
7. Can’t – Capitate.
8. Handle – Hamate.

What 3 bones make up your arm?

Your arm is made up of three bones: the upper arm bone (humerus) and two forearm bones (the ulna and the radius). The term “broken arm” may refer to a fracture in any of these bones.

How many bones make up the wrist?

The 8 bones that create the wrist. The 2 rows of carpal bones are connected to 2 bones of the arm–the ulna bone and the radius bone.

Why does my Pisiform bone hurt?

Causes of wrist pain Chronic pain in the pisiform area (or wrist pain) may be caused by tendonitis of the flexor carpi ulnaris, bony fractures or osteoarthritis of the pisotriquetral joint. Osteoarthritis of the pisotriquetral joint is most often caused by acute and chronic trauma and instability.

What happens if the scaphoid bone dies?

Avascular necrosis occurs when part of the scaphoid bone dies because of the loss of blood flow. This can eventually result in fragmentation and the collapse of the bone. Its presence also makes repair of the scaphoid much more difficult.

How serious is a scaphoid fracture?

A scaphoid fracture can lead to wrist osteoarthritis, especially if the fracture is untreated and does not heal correctly. This is called “nonunion.” Severe cases of this kind of osteoarthritis can lead to an incorrect alignment of wrist bones in what is called scaphoid nonunion advanced collapse (SNAC).

Why are scaphoid fractures missed?

Conclusions: Most of these scaphoid fractures were missed due to failure to consider the possibility of a scaphoid fracture and search for clinical signs of this injury. Some were missed due to failure to detect (or absence of) tenderness over the scaphoid bone.

Why does my ulna bone stick out?

It is a congenital subluxation or dislocation of the ulna’s distal end, due to malformation of the bones. Sometimes, minor abnormalities of other bone structures, often caused by disease or injury, such as a fracture of the distal end of the radius with upward displacement of the distal fragment.

What does it mean when your ulna hurts?

Overuse. Damaged tendons and ligaments due to repeated hand and arm motions or injuries. Triangular fibrocartilage complex (TFCC) injury. Tears or fraying in the tissues that connect the ulna to other parts of the wrist, often from a fall onto the wrist, or multiple repetitive twisting injuries.

What is the bony prominence on the wrist?

A carpal boss is also known as a bossing. It is a bony overgrowth or lump on the back of the wrist at the base of the index (pointer finger) or long (middle finger) metacarpal bones where they join the carpal bones.