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Information about Metacarpal

Bone: Metacarpus
Metacarpals are #3
Bones of the left hand. Dorsal surface.
Latinmetacarpalia
subject #55 227
MeSH Metacarpus
The metacarpus is the intermediate part of the hand skeleton that is located between the fingers distally and the carpus which forms the connection to the forearm.

Specific metacarpals

It consists of five cylindrical bones which are numbered from the radial to the ulnar side (ossa metacarpalia I-V).

Common characteristics of the metacarpal bones

Each consists of a body and two extremities.

Body

The body (corpus; shaft) is prismoid in form, and curved, so as to be convex in the longitudinal direction behind, concave in front.

It presents three surfaces: medial, lateral, and dorsal.
  • The medial and lateral surfaces are concave, for the attachment of the interosseus muscles, and separated from one another by a prominent anterior ridge.
  • The dorsal surface presents in its distal two-thirds a smooth, triangular, flattened area which is covered in by the tendons of the Extensor muscles. This surface is bounded by two lines, which commence in small tubercles situated on either side of the digital extremity, and, passing upward, converge and meet some distance above the center of the bone and form a ridge which runs along the rest of the dorsal surface to the carpal extremity. This ridge separates two sloping surfaces for the attachment of the Interossei dorsales.
To the tubercles on the digital extremities are attached the collateral ligaments of the metacarpophalangeal joints.

Base

The base or carpal extremity (basis) is of a cuboidal form, and broader behind than in front: it articulates with the carpus, and with the adjoining metacarpal bones; its dorsal and volar surfaces are rough, for the attachment of ligaments.

Head

The head or digital extremity (capitulum) presents an oblong surface markedly convex from before backward, less so transversely, and flattened from side to side; it articulates with the proximal phalanx.

It is broader, and extends farther upward, on the volar than on the dorsal aspect, and is longer in the antero-posterior than in the transverse diameter.

On either side of the head is a tubercle for the attachment of the collateral ligament of the metacarpophalangeal joint.

The dorsal surface, broad and flat, supports the tendons of the extensor muscles; the volar surface is grooved in the middle line for the passage of the Flexor tendons, and marked on either side by an articular eminence continuous with the terminal articular surface.

Articulations

Besides their phalangeal articulations, the metacarpal bones articulate as follows:
  • the first with the greater multangular;
  • the second with the greater multangular, lesser multangular, capitate and third metacarpal;
  • the third with the capitate and second and fourth metacarpals;
  • the fourth with the capitate, hamate, and third and fifth metacarpals;
  • and the fifth with the hamate and fourth metacarpal.

See also

Additional images


Human hand bones

Multiple fractures of the metacarpals (aka broken hand).

Hand bones

Bones of the left hand. Volar surface.

Ligaments of wrist. Anterior view.

Metacarpophalangeal articulation and articulations of digit. Volar aspect.

Metacarpophalangeal articulation and articulations of digit. Ulnar aspect.




This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.
 •  • [ e]
Bones of upper limbs
Pectoral girdle, clavicleconoid tubercle - trapezoid line - costal tuberosity - subclavian groove
Scapulaspine of scapula - suprascapular notch - acromion - glenoid cavity - glenoidal labrum - coracoid process - fossae (subscapular, supraspinatous, infraspinatous) - borders (superior, lateral/axillary, medial/vertebral) - angles (superior, inferior, lateral) - tubercles (infraglenoid, supraglenoid)
Humerusupper extremity - necks (anatomical, surgical) - tubercles (greater, lesser) - intertubercular groove - body - radial sulcus - deltoid tuberosity
lower extremity - capitulum - trochlea - epicondyles (lateral, medial) - supracondylar ridges (lateral, medial) - fossae (radial, coronoid, olecranon)
Forearmulna: upper extremity (olecranon, coronoid process, tuberosity, radial notch, semilunar notch) - body of ulna - lower extremity (styloid process)
radius: upper extremity (tuberosity) - body - lower extremity (ulnar notch, styloid process)
Handcarpus: scaphoid - lunate - triquetral - pisiform - trapezium - trapezoid - capitate - hamate (hamulus) - metacarpus: 1st metacarpal - 2nd - 3rd - 4th - 5th - phalanges of the hand
Latin}}} 
Official status
Official language of: Vatican City
Used for official purposes, but not spoken in everyday speech
Regulated by: Opus Fundatum Latinitas
Roman Catholic Church
Language codes
ISO 639-1: la
ISO 639-2: lat
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Medical Subject Headings (MeSH) is a huge controlled vocabulary (or metadata system) for the purpose of indexing journal articles and books in the life sciences. Created and updated by the United States National Library of Medicine (NLM), it is used by the MEDLINE/PubMed
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The hands (med./lat.: manus, pl. manūs) are the two intricate, prehensile, multi-fingered body parts normally located at the end of each arm (medically: "terminating each anterior limb/appendage") of a human or other primate.
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skeleton or skeletal system is the biological system providing physical support in living organisms. (By extension, non-biological outline structures such as gantries or buildings may also acquire skeletons.
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In sciences dealing with the anatomy of animals, precise anatomical terms of location are necessary for a variety of reasons. Non-scientists often wonder why zoological and human anatomists use complex terminology to describe locations on a body, when common terms like "up",
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carpus is the cluster of bones in the hand between the radius and ulna and the metacarpus. The bones of the carpus do not belong to individual fingers, whereas those of the metacarpus do. The joint between the radius and ulna and the carpus is called the wrist.
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For the firearm component, see .
The forearm is the structure on the upper limb, between the elbow and the wrist.[1]. This term is used in anatomy to distinguish it from the arm (or upper arm).
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Bones are rigid organs that form part of the endoskeleton of vertebrates. They function to move, support, and protect the various organs of the body, produce red and white blood cells and store minerals.
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The radius is the bone of the forearm that extends from the outside of the limb to the phlangx (lateral) of the elbow to the thumb side of the wrist. The radius is situated on the lateral side of the ulna, which exceeds it in length and size.
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Ulnar can refer to:
  • Ulnar nerve
  • Ulnar artery
  • Ulna

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The first metacarpal bone (metacarpal bone of the thumb) which connects to the thumb is shorter and stouter than the others, diverges to a greater degree from the carpus, and its volar surface is directed toward the palm.
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The second metacarpal bone (metacarpal bone of the index finger) is the longest, and its base the largest, after the first metacarpal.

Its base is prolonged upward and medialward, forming a prominent ridge.
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The third metacarpal bone (metacarpal bone of the middle finger) is a little smaller than the second.

The dorsal aspect of its base presents on its radial side a pyramidal eminence, the styloid process, which extends upward behind the capitate; immediately distal to
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The fourth metacarpal bone (metacarpal bone of the ring finger) is shorter and smaller than the third.

The base is small and quadrilateral; its superior surface presents two facets, a large one medially for articulation with the hamate, and a small one laterally for
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The fifth metacarpal bone (metacarpal bone of the little finger) presents on its base one facet on its superior surface, which is concavo-convex and articulates with the hamate, and one on its radial side, which articulates with the fourth metacarpal.
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Interosseus muscle can refer to:
  • Dorsal interossei muscles
  • Palmar interossei muscles
  • Plantar interossei muscles

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Interossei dorsales can refer to:
  • Dorsal interossei muscles (hand)
  • Dorsal interossei muscles (foot)

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The metacarpophalangeal joints (MCP) 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 first phalanges, with the exception of that of the thumb, which presents more of the characters
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Released October 31, 2007
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Producer(s) I've Sound

Mami Kawada singles chronology

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(2007) JOINT
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In sciences dealing with the anatomy of animals, precise anatomical terms of location are necessary for a variety of reasons. Non-scientists often wonder why zoological and human anatomists use complex terminology to describe locations on a body, when common terms like "up",
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Public domain comprises the body of knowledge and innovation (especially creative works such as writing, art, music, and inventions) in relation to which no person or other legal entity can establish or maintain proprietary interests within a particular legal jurisdiction.
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Henry Gray's Anatomy of the Human Body (or Gray's Anatomy as it has commonly been shortened) is an English-language human anatomy textbook widely regarded as a classic work on the subject.
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Bones are rigid organs that form part of the endoskeleton of vertebrates. They function to move, support, and protect the various organs of the body, produce red and white blood cells and store minerals.
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In human anatomy, the upper limb (also upper extremity) refers to what in common English is known as the arm, that is, the region of the shoulder to the fingertips. It includes the entire limb, and thus, is not synonymous with the term upper arm.
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The pectoral girdle is the set of bones which connect the upper limb to the axial skeleton on each side. It consists of the clavicle and scapula in humans and, in those species with three bones in the pectoral girdle, the coracoid. Some mammalian species (e.g.
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Collarbone and collar bone redirect here. The eye abnormality is correctly spelled coloboma.
This article uses some professional terms to describe relative positions and directions.

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conoid tubercle (or coracoid tuberosity); this, in the natural position of the bone, surmounts the coracoid process of the scapula, and gives attachment to the conoid ligament.
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From the coracoid tuberosity an oblique ridge, the trapezoid line (or trapezoid ridge, or oblique), runs forward and lateralward, and afford attachment to the trapezoid ligament.
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On the medial part of the clavicle is a broad rough surface, the costal tuberosity (impression for costoclavicular ligament), rather more than 2 cm. in length, for the attachment of the costoclavicular ligament.
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groove, which gives attachment to the Subclavius; the coracoclavicular fascia, which splits to enclose the muscle, is attached to the margins of the groove. Not infrequently this groove is subdivided longitudinally by a line which gives attachment to the intermuscular septum of the
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