Quick Answer: What Are The Joints Of The Thumb?

Why does my thumb joint hurt so bad?

There are many potential causes for thumb pain, but the three most common conditions that tend to develop are 1) arthritis, 2) trigger thumb, and 3) de Quervain tenosynovitis.

The location of the pain and symptoms can help determine the exact cause of your pain and what your best treatment option may be..

Is Thumb arthritis a disability?

While most individuals can function with OA with minimal discomfort, if your hand OA becomes severe enough that it effects your ability to function at your job, and there is no other work you can do, you may be able to receive Social Security disability benefits, including Social Security Disability Insurance (SSDI) …

How many ways can you move your thumb joint?

Function of the muscles: Power, touch and precision Our hands can grasp and move objects in two different ways: with a power grip or precision grip.

Where is the MCP joint in the thumb?

The metacarpophalangeal joints (MCP) are situated between the metacarpal bones and the proximal phalanges of the fingers. These joints are of the condyloid kind, formed by the reception of the rounded heads of the metacarpal bones into shallow cavities on the proximal ends of the proximal phalanges.

What are the joints of the thumb called?

The thumb basal joint, also known as the carpometacarpal (CMC) joint, is a specialized saddle-shaped joint that is formed by a small wrist bone (trapezium) and the first of the three bones in the thumb (metacarpal).

What are the 5 Fingers called?

The first digit is the thumb, followed by index finger, middle finger, ring finger, and little finger or pinkie. According to different definitions, the thumb can be called a finger, or not.

Where is the interphalangeal joint of the thumb?

Interphalangeal Joint (IP) The IP joint in thumb is located at the tip of the finger just before the fingernail starts. The terminal extensor tendon in the thumb comes from the extensor pollicis longus muscle. The radial and ulnar collateral ligaments are important to provide stability of the fingertip during pinching.

Why does the thumb only have 2 joints?

Thumbs only have two bones, so they’re obviously shorter, and they play a very important role that no other finger can claim; thanks to their unique saddle-like joint shape, and a little muscle known as the abductor pollicis brevis, you can bend and stretch your thumbs opposite your fingers to grip things.

Why is it called thumb?

THUMB. … The term “thumb” was first used before the 12th century and is believed to have come from the Proto-Indo-European term tum, meaning “to swell,” which makes the thumb “the swollen one.” There is some debate as to whether the thumb can rightfully be called a finger, but classification aside, the name fits.

What causes lump on thumb joint?

Symptoms of a ganglion cyst Ganglion cysts look and feel like a smooth lump under the skin. They’re made up of a thick, jelly-like fluid called synovial fluid, which surrounds joints and tendons to lubricate and cushion them during movement.

What does Thumb arthritis look like?

Appearance. The thumb may appear swollen, especially at its base, and you may develop a bony bump. Overall, the base of the thumb can take on an enlarged appearance. One alarming sign of thumb arthritis is improper alignment of the joint as it shifts from its normal positioning.

Does the thumb have a PIP joint?

Each of the digits, except the thumb, has three phalanges with three hinged joints: distal interphalangeal (DIP), proximal interphalangeal (PIP), and metacarpophalangeal (MCP) (figure 1), with a fingernail at the dorsal end (figure 2 and picture 1 and figure 3). … The thumb is discussed below (see ‘Thumb anatomy’ below).

Is the thumb a finger medically?

A thumb is a digit, but not technically a finger.

How important is the thumb?

Your thumbs are separated from your other fingers. This allows you to hold things. In biology, which is the study of living things, the human thumb has a special name. It is called an opposable thumb because it can be moved around to touch your other fingers.

Is your thumb the longest finger?

Look at your hand. Which finger is the longest? You might say your middle finger, but if you include all 5 fingers, your thumb is actually the longest! It looks like it has only 2 bones, but the third is inside your hand — look at how far down it reaches.

Does the thumb have 3 joints?

The thumb does not have a middle phalanx. Each finger contains 3 joints, more commonly known as knuckles. The thumb has two knuckle joints. … The joint closest to the fingertip is called the distal interphalangeal joint (DIP).

How do you know if you have arthritis in your thumb?

Pain is the first and most common symptom of thumb arthritis. Pain can occur at the base of your thumb when you grip, grasp or pinch an object, or use your thumb to apply force. Other signs and symptoms might include: Swelling, stiffness and tenderness at the base of your thumb.

How many joints does a thumb have?

Each thumb has two joints. The surfaces of the bones where they meet to form joints are covered with a layer of cartilage, which allows them to glide smoothly against one another as they move.