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What is the distal metacarpal?
Distal heads of the metacarpals articulate with the proximal phalanges and form the knuckles. The 1st metacarpal is the thickest and shortest of these bones. The 3rd metacarpal is distinguished by a styloid process on the lateral side of its base.
Where is the distal fifth metacarpal?
The fifth metacarpal bone (metacarpal bone of the little finger or pinky finger) is the most medial and second-shortest of the metacarpal bones.
Which is the distal bone of hand?
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.
Where is the metacarpal located?
metacarpal, any of several tubular bones between the wrist (carpal) bones and each of the forelimb digits in land vertebrates, corresponding to the metatarsal bones of the foot.
How painful is a metacarpal fracture?
When you've fractured a metacarpal bone, you will probably have pain when you try to form a fist, and you may also find that your fingers are stiff. Other symptoms that can suggest that you've suffered a metacarpal fracture include: Immediate pain in the hand.
What metacarpal is the pinky finger?
5th metacarpalThe 5th metacarpal is the metacarpal of the 5th (pinky) finger. The neck of the metacarpal bone is where the main shaft of the bone starts to widen outwards towards the knuckle.
Where is the distal?
Distal refers to sites located away from a specific area, most often the center of the body. In medicine, it refers to parts of the body further away from the center. For example, the hand is distal to the shoulder. The thumb is distal to the wrist.
Are fingers distal?
The phalanges are comprised of the proximal, middle, and distal groups. The proximal bones are located just below the knuckle, while the middle bones are located above the knuckle. The distal phalanges are the fingertips.
Where are the distal phalanges?
Distal Phalanges 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.
Is the metacarpal part of the finger?
In human anatomy, the metacarpal bones or metacarpus form the intermediate part of the skeletal hand located between the phalanges of the fingers and the carpal bones of the wrist, which forms the connection to the forearm. The metacarpal bones are analogous to the metatarsal bones in the foot.
What is a metacarpal mean?
metacarpal. noun. Definition of metacarpal (Entry 2 of 2) : a bone of the part of the hand or forefoot between the carpus and the phalanges that typically contains five more or less elongated bones when all the digits are present.
Which finger is the first metacarpal?
The first metacarpal bone is associated with the thumb, the 5th metacarpal bone is associated with the little finger. The joints between the carpals and the metacarpals are known as carpometacarpal joints. The joints between the metacarpals and the proximal phalanges are known a metacarpophalangeal (MCP) joints.
Overview
Structure
The metacarpals form a transverse arch to which the rigid row of distal carpal bones are fixed. The peripheral metacarpals (those of the thumb and little finger) form the sides of the cup of the palmar gutter and as they are brought together they deepen this concavity. The index metacarpal is the most firmly fixed, while the thumb metacarpal articulates with the trapezium and acts inde…
Clinical significance
The fourth and fifth metacarpal bones are commonly "blunted" or shortened, in pseudohypoparathyroidism and pseudopseudohypoparathyroidism.
A blunted fourth metacarpal, with normal fifth metacarpal, can signify Turner syndrome.
Blunted metacarpals (particularly the fourth metacarpal) are a symptom of nevoid basal-cell carcinoma syndrome.
Other animals
In four-legged animals, the metacarpals form part of the forefeet, and are frequently reduced in number, appropriate to the number of toes. In digitigrade and unguligrade animals, the metacarpals are greatly extended and strengthened, forming an additional segment to the limb, a feature that typically enhances the animal's speed. In both birds and bats, the metacarpals form part …
History
The Greek physician Galen used to refer to the metacarpus as μετακάρπιον. The Latin form metacarpium more truly resembles its Ancient Greek predecessor μετακάρπιον than metacarpus. Meta– is Greek for beyond and carpal from Ancient Greek καρπός (karpós, “wrist”). In anatomic Latin, adjectives like metacarpius, metacarpicus, metacarpiaeus, metacarpeus, metacarpianus and metacarpalis can be found. The form metacarpius is more true to the later Greek form μετα…
See also
• Carpometacarpal bossing
Further reading
• Tubiana, Raoul; Thomine, Jean-Michel; Mackin, Evelyn (1998). Examination of the Hand and Wrist. Taylor & Francis. ISBN 1-85317-544-7.