Bones of the hand (Featured Image)

Bones Of The Hands

We are going to talk about the bones of the hand. And there are some questions like what are the bones of the hand? What are the primary bony landmarks? And what are some reasons to learn about them?

Let’s begin with the principle bone of the hand. Those bones consist of carpals, metacarpals, and phalanges.

Carpals, metacarpals, phalanges

 

Carpal bones are the wrist. In the surface anatomy, the christ is showing you the location of carpal bones. If you go right in the middle and distal then, there is an area called the carpal tunnel.

Carpal tunnel

 

Carpal bones form a concave surface and this has a roof called transverse carpal ligament (flexor retinaculum). It is made of dense regular collagen collective tissue and this is extremely tough as most as bones.

Transverse carpal ligament

 

The transverse carpal ligament forms a carpal tunnel it contains 4 tendons of the flexor digitorum superficialis (FDS), 4 tendons of the flexor digitorum profundus (FDP), and 1 flexor pollicis longus (FPL) tendon.

These 9 tendons all are wrap in synovial sheaths shown in blue color below image,

Synovial Sheaths

And there is a median nerve which is basically, it’s a connection between the forearm and the surface of the hand.

There are 8 carpal bones are organized in two rows. There is a proximal row 4 of carpal bones and distal row 4 of carpal bones.

Carpal bones 8 (rows)Ulna, Radius

 

There is a radius and ulna. Let’s, look at the 8 carpal bone are,

8 Bone names

  1. Scaphoid bone: The scaphoid articulates with the radius and it lies on the thumb side of your wrist. The scaphoid fracture is the most common fracture of the carpal bone.
  2. Lunate bone: Lunate means ‘moon’ in Latin because it has a shape like a moon.
  3. Triquetrum bone: This bone is articulate in the medial side of the wrist joint. It is a pyramidal-shaped bone.
  4. Pisiform bone: Pisiform bone has a shape of a pea that comes from the Latin word.
  5. Trapezium bone: The trapezium bone is the last in the row of wrist bones and is located beneath the thumb joint.
  6. Trapezoid bone: Trapezoid bone is Latin for table shaped.
  7. Capitate bone: Capitate bone is Latin for head-shaped.
  8. Hamate bone: Hamate bone is Latin for hook-shaped.

The Metacarpals bones get their name because the prefix ‘Meta’ is Greek for ‘after the wrist’. These are the bones after the wrist. There is the bone from 1 to 5.

Metacarpals 1 to 5

 

They are found in the palm area. So, there are metacarpals 1, 3, and 5. The medial shaft of the metacarpals in the body in the distal portion is called the “head” and the proximal portion is called the “base”.

Metacarpals (head, base)

 

 

The Phalanges are,

Phalanges

  1. Thumb finger
  2. Index finger
  3. Swear finger
  4. Ring finger
  5. Pinky finger

 

If we look at from finger 2 to finger 5, they are composed of three phalanges: proximal phalanges, middle phalanges, and distal phalanges. The thumb only has proximal and distal phalanges.

finger 2 to finger 5

Metacarpophalangeal joints (MCP)

The joint between metacarpals and proximal phalanges is called the Metacarpophalangeal (MCP) joint.

(DIP, PIP)IP Joint

  • The joint between the phalanges is called Proximal Interphalangeal (PIP) joint.
  • The joint between the proximal Interphalangeal and distal is called the distal interphalangeal (DIP) joint.
  • There are only two phalanges in the thumb, so there is only the Interphalangeal (IP) joint.

DIP, PIP, MCP

 

 

For more information talk to a healthcare provider.

If you have any questions about Bones of the hand please feel free and leave a comment.

Do share this blog with your friends and family!

 

 

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What is Humerus Fracture?

The long bone of your upper arm is known as the Humerus. It extends from the shoulder to the elbow and it joins with the ulna and radius bones. Any break in this bone is referred to as a Humerus Fracture. A person may have either shoulder pain or elbow pain depending on where the fracture is and it takes several weeks for recovery.

Types of Humerus Fracture
Depending on the location of the crack, there are three types of Humerus Fracture-
Proximal- When there is a break in the upper part of the bone, it is called a proximal fracture. This causes shoulder pain as it is close to the shoulder.
Mid-shaft- This happens when there is a break in the middle of your humerus.
Distal- A distal humerus fracture occurs near the elbow. It is usually part of a more complex elbow injury and sometimes involves loose bone fragments.

What causes it?
Any Severe injury to the upper arm can result in a humerus fracture, but some are more likely to cause certain types. For example, falling with an outstretched arm can often cause mid-shaft and proximal humerus fractures. A high-impact crash, such as a car accident or football tackle, is more likely to cause a distal humerus fracture. If there is a medical condition where bones are becoming weaker, then humerus fracture may occur as a pathological fracture. This can lead to injuries and fractures from everyday activities that wouldn’t usually cause any injuries.

Things that can cause pathological humerus fracture-
Bone Cancer
Bone Infection
Osteoporosis
Bone Cysts or Tumors

This is the basic information about Humerus Fracture. We recommend you to visit a doctor after facing such issues. We hope this information adds value to your knowledge. Watch out this space for more such information. Greetings for SYS Medtech International PVT. LTD.

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