The distal phalanx of the finger is the distal or third of the three bones in each finger when counting from the hand to the tip of the finger. The distal phalanx has a joint just with the middle phalanx. On the tip of the phalanx is a bulbous tuft of bone that helps give the finger its rounded appearance.

What are the distal joints?

Distal interphalangeal joints are the articulations between the phalanges of the hand or foot. This term therefore includes: Interphalangeal articulations of hand.

What is the joint in your finger called?

Each of the fingers has three joints: metacarpophalangeal joint (MCP) – the joint at the base of the finger. proximal interphalangeal joint (PIP) – the joint in the middle of the finger. distal interphalangeal joint (DIP) – the joint closest to the fingertip.

What is the name of the most distal finger bones?

Human hands contain fourteen digital bones, also called phalanges, or phalanx bones: two in the thumb (the thumb has no middle phalanx) and three in each of the four fingers. These are the distal phalanx, carrying the nail, the middle phalanx, and the proximal phalanx.

Where is distal phalanges?

The proximal bones are located just below the knuckle, while the middle bones are located above the knuckle. The distal phalanges are the fingertips.

Does RA affect distal finger joints?

The first knuckle at the top of the finger closest to the nails — the DIP, or distal interphalangeal joint — is generally spared in RA. (It is more often involved in other types of arthritis such as osteoarthritis or psoriatic arthritis.)

Where is the distal tuft?

The terminal tuft is the most distal part of a distal phalanx (toe or finger), comprising the flared bone distal to the shaft.

Which type of nodules occur on the distal interphalangeal DIP joints of the fingers in a patient with osteoarthritis OA )?

A Heberden node describes a bony swelling of the distal interphalangeal finger joint. It is a sign of osteoarthritis, a degenerative joint disease.

Where is the PIP joint of finger?

The PIP joint is the first joint of the finger and is located between the first two bones of the finger. The PIP joint can bend and extend the finger. It becomes stiff easily after injury and has very limited side to side motion.

What are the 14 phalanges bones?

The phalanges are the bones that make up the fingers of the hand and the toes of the foot. There are 56 phalanges in the human body, with fourteen on each hand and foot. Three phalanges are present on each finger and toe, with the exception of the thumb and large toe, which possess only two.

Article first time published on

What are phalanges bones?

Phalanges. The 14 bones that are found in the fingers of each hand and also in the toes of each foot. Each finger has 3 phalanges (the distal, middle, and proximal); the thumb only has 2.

What is the top part of your finger called?

The extensor hood covers the top of the finger, connecting to the middle and distal phalanges. Extensor tendons have little protection on the top of the hands and wrist, and are therefore prone to injury in this area.

What is finger pulp?

Anatomy of the Fingertip The pulp consists of fibrofatty tissue that is stabilized by fibrous septa extending from the dermis to the periosteum of the distal phalanx. The nail complex, or perionych- ium, includes the nail plate, the nail bed, and the surrounding skin on the dorsum of the fingertip (paro- nychium) (Fig.

What is an MP joint?

The large joints in the hand at the base of each finger are known as the metacarpophalangeal (MP, or MCP) joints. They act as complex hinge joints and are important for both power grip and pinch activities.

Can you break your distal phalanges?

Distal Phalanx Fractures The distal phalanx is the most commonly fractured bone of the hand. 5 The mechanism of fracture is usually a crush injury. On clinical examination, the fingertip is swollen and painful. Extensive soft tissue damage to the finger pulp with associated nail bed laceration may occur.

What is the function of the phalanges?

The phalanges of the fingers help us manipulate our environment while the phalanges of the foot help us balance, walk, and run.

Does a distal phalanx fracture require surgery?

However, distal phalanx base fractures are considered unstable because of the insertion sites of the flexor and extensor tendons, and these fractures require surgery (16).

What protect the distal part of your finger and toes?

Function. A healthy fingernail has the function of protecting the distal phalanx, the fingertip, and the surrounding soft tissues from injuries. It also serves to enhance precise delicate movements of the distal digits through counter-pressure exerted on the pulp of the finger.

Is there a bone in the tip of your finger?

There are three bones in your finger. The bone under your nail at the end of your finger is called the “distal phalanx.” The skin at the tip of your finger (with which you touch things) is called the “pulp.”

Can you have rheumatoid arthritis in one finger?

Rheumatoid arthritis commonly affects the small joints of your wrists, hands and fingers. It usually affects the same joints on both sides of your body. For instance, if arthritis affects finger joints one hand, it’s likely to affect the finger joints on your other hand too.

What are the first signs of arthritis in fingers?

• Pain. Pain is a common early symptom of arthritis in the hands and fingers. …
• Swelling. Joints may swell with overuse. …
• Warm to the touch. Swelling can also cause the joints to feel warm to the touch. …
• Stiffness. …
• Bending of the middle joint. …
• Numbness and tingling. …
• Bumps in the fingers. …
• Weakness.

What joints are least affected by rheumatoid arthritis?

The shoulders, elbows, knees, and ankles are also affected in many patients. The distal interphalangeal (DIP) joints are generally spared. With the exception of the cervical spine, the spine is unaffected.

What is DIP and PIP?

“proximal interphalangeal joints” (PIJ or PIP), those between the first (also called proximal) and second (intermediate) phalanges. “distal interphalangeal joints” (DIJ or DIP), those between the second (intermediate) and third (distal) phalanges.

Does the thumb have a distal phalanx?

There are fourteen phalanges in each hand; each of the medial four digits has three phalanges (proximal, middle and distal), while the thumb has only two (proximal and distal).

What type of joint is PIP?

The PIP joint is a hinge joint with 100 to 110 degrees of motion. At the proximal phalanx are two condyles and between the condyles is the intercondylar notch. Because of the slight asymmetry of the condyles, about 9 degrees of supination occurs with PIP flexion.

What type of joint is the distal interphalangeal joint?

TypeSynovial hinge joint; uniaxialArticular surfacesHead of proximal phalanx, base of middle phalanx, head of middle phalanx, and base of distal phalanxLigamentsMedial collateral ligament, lateral collateral ligamentInnervationProper palmar digital nerves

Can you stop heberden nodes?

Unfortunately, no. There is no cure for Heberden’s nodes or finger OA, but with proper treatment, the disease can be managed effectively and progression stopped or delayed.

Can you have rheumatoid arthritis without a positive ANA?

People who don’t test positive for the presence of RF and anti-CCP can still be diagnosed with rheumatoid arthritis based on their symptoms, a physical exam of their joints, and imaging tests (X-rays and ultrasounds) that can show patterns of cartilage and bone deterioration.

How do you identify phalanges?

The digits are named in a similar fashion to the metacarpals, moving lateral to medial, and starting at the thumb. With the exception of the thumb, each digit contains a proximal, intermediate, and distal phalange; the thumb lacks an intermediate phalange. The length of the phalanges decreases distally.

What are the 7 tarsal bones?

The tarsal bones are 7 in number. They are named the calcaneus, talus, cuboid, navicular, and the medial, middle, and lateral cuneiforms.

What are the 3 bones of the phalanges?

Phalanges: The bones of the fingers and of the toes. There are generally three phalanges (distal, middle, proximal) for each digit except the thumbs and large toes. The singular of phalanges is phalanx.