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The Triangular Bone (os triquetum; cuneiform bone) (Fig. 223).—The triangular bone may be distinguished by its pyramidal shape, and by an oval isolated facet for articulation with the pisiform bone. It is situated at the upper and ulnar side of the carpus. The superior surface presents a medial, rough, non-articular portion, and a lateral convex articular portion which articulates with the triangular articular disk of the wrist. The inferior surface, directed lateralward, is concave, sinuously curved, and smooth for articulation with the hamate. The dorsal surface is rough for the attachment of ligaments. The volar surface presents, on its medial part, an oval facet, for articulation with the pisiform; its lateral part is rough for ligamentous attachment. The lateral surface, the base of the pyramid, is marked by a flat, quadrilateral facet, for articulation with the lunate. The medial surface, the summit of the pyramid, is pointed and roughened, for the attachment of the ulnar collateral ligament of the wrist. 8

Articulations.—The triangular articulates with three bones: the lunate laterally, the pisiform in front, the hamate distally; and with the triangular articular disk which separates it from the lower end of the ulna.

The Triangular Bone (os triquetrum; cuneiform bone)

triquetral

Template:Infobox Bone The triquetral bone (also called triquetrum bone, cuneiform bone, pyramidal bone, cubital bone, three-cornered bone, and triangular bone) is located in the wrist on the medial side of the proximal row of the carpus between the lunate and pisiform bones. It is on the ulnar side of the hand, but does not articulate with the ulna. It connects with the pisiform, hamate, and lunate bones. It is the 3rd most commonly fractured carpal bone.

The triangular bone may be distinguished by its pyramidal shape, and by an oval isolated facet for articulation with the pisiform bone. It is situated at the upper and ulnar side of the carpus. To facilitate its palpation in an exam, the hand must be radially deviated so that the triquetrium moves out from under the ulnar styloid process. The triquetrum may be difficult to find, since it also lies under the pisiform.

The etymology derives from the Latin triquetrus which means "three-cornered."

Surfaces

The superior surface presents a medial, rough, non-articular portion, and a lateral convex articular portion which articulates with the triangular articular disk of the wrist.

The inferior surface, directed lateralward, is concave, sinuously curved, and smooth for articulation with the hamate. The dorsal surface is rough for the attachment of ligaments.

The volar surface presents, on its medial part, an oval facet, for articulation with the pisiform; its lateral part is rough for ligamentous attachment.

The lateral surface, the base of the pyramid, is marked by a flat, quadrilateral facet, for articulation with the lunate.

The medial surface, the summit of the pyramid, is pointed and roughened, for the attachment of the ulnar collateral ligament of the wrist.

Additional images

Bones of the left hand. Volar surface.
Bones of the left hand. Dorsal surface.

Template:Bones of upper extremity

Template:Musculoskeletal-stub

fr:Os triquetrum nl:Os triquetrum sk:Trojhranná kosť

By comparison, the term "palm" applies to only the palm (the grasping side) of the hand. The Romans actually used the word "palma" for the outstretched palm of the hand.

Topics in Anatomy

SYSTEMIC ANATOMY Introduction and Systemic Overview

Anatomical Nomenclature
Basic Structure and Function of Cells
Integrating Cells into Tissues

Systemic Overview

Nervous System
Blood, Lymphoid Tissues and Haemopoiesis
Functional Anatomy of the Musculoskeletal System
Smooth Muscle and the Cardiovascular and Lymphatic systems
Skin and its Appendages
Endocrine System
Principles of Hormone Production and Secretion
Embryology
- Embryogenesis
- Prenatal and Neonatal Growth

Integumentary System

integumentary system

Cardiovascular System (Circulatory System)

@@ Line 1: / Line 1: @@
-'''parent article''' - [[biology]]
+{{AccountNotLive}}
+{{systemic}}
-==Definition==
+The Triangular Bone (os triquetum; cuneiform bone) (Fig. 223).—The triangular bone may be distinguished by its pyramidal shape, and by an oval isolated facet for articulation with the pisiform bone. It is situated at the upper and ulnar side of the carpus. The superior surface presents a medial, rough, non-articular portion, and a lateral convex articular portion which articulates with the triangular articular disk of the wrist. The inferior surface, directed lateralward, is concave, sinuously curved, and smooth for articulation with the hamate. The dorsal surface is rough for the attachment of ligaments. The volar surface presents, on its medial part, an oval facet, for articulation with the pisiform; its lateral part is rough for ligamentous attachment. The lateral surface, the base of the pyramid, is marked by a flat, quadrilateral facet, for articulation with the lunate. The medial surface, the summit of the pyramid, is pointed and roughened, for the attachment of the ulnar collateral ligament of the wrist.	   8
+Articulations.—The triangular articulates with three bones: the lunate laterally, the pisiform in front, the hamate distally; and with the triangular articular disk which separates it from the lower end of the ulna.
-'''Morphology''' is the branch of [[biology]] that deals with the structure of plants and animals, and with relationships between their structures. The term is also used to refer to the physical appearance, i.e. size, shape, color, texture, and location of something, e.g. the morphology of a cancerous mole versus a benign one.
+The Triangular Bone (os triquetrum; cuneiform bone)
-==Etymology==
+{{Image|triquetral.JPG|left|300px|triquetral}}
-The word morphology came into English in the mid 19th century from Greek words ''μορφή (morph)'' meaning "shape or form" and ''λόγος (logos)'' meaning "speak". In English the suffix "-(o)logy" means "the study of". For ancient Greeks, study often involved a great deal of debate; and this is still true for scientists today.
+{{Infobox Bone |
+  Name          = Triquetral bone |
+  Latin         = os triquetrum, os pyramidale, os triangulare |
+  GraySubject   = 54 |
+  GrayPage      = 224 |
+  Image         = Carpus.png |
+  Caption       = '''BONES OF HAND'''<BR>''Proximal:'' A=[[Scaphoid bone|Scaphoid]], B=[[Lunate bone|Lunate]], C=[[Triquetral bone|Triquetral]], D=[[Pisiform bone|Pisiform]]<BR>''Distal:'' E=[[Trapezium bone|Trapezium]], F=[[Trapezoid bone|Trapezoid]], G=[[Capitate bone|Capitate]], H=[[Hamate bone|Hamate]]<BR> |
+  Image2        = Gray223.png |
+  Caption2      = The left triquetal bone. |
+  Origins       = |
+  Insertions    = |
+  Articulations = articulates with ''three'' bones:<BR>[[lunate]] laterally<BR>[[pisiform]] in front<BR>[[hamate]] distally<BR>triangular [[articular disk]] which separates it from the lower end of the [[ulna]]. |
+  MeshName      = Triquetrum+Bone |
+  MeshNumber    = A02.835.232.087.319.150.831 |
+  DorlandsPre   = o_07 |
+  DorlandsSuf   = 12598819  |
+}}
+The '''triquetral bone''' (also called '''triquetrum bone''', '''cuneiform bone''', '''pyramidal bone''', '''cubital bone''', '''three-cornered bone''', and '''triangular bone''') is located in the [[wrist]] on the medial side of the proximal row of the [[carpus]] between the [[lunate]] and [[pisiform]] bones. It is on the [[ulnar]] side of the hand, but does not articulate with the [[ulna]]. It connects with the [[pisiform]], [[hamate]], and [[lunate]] bones. It is the 3rd most commonly fractured carpal bone.
-==Branches of Morphology==
+The triangular bone may be distinguished by its pyramidal shape, and by an oval isolated facet for articulation with the pisiform bone. It is situated at the upper and ulnar side of the carpus. To facilitate its palpation in an exam, the hand must be radially deviated so that the triquetrium moves out from under the ulnar styloid process. The triquetrum may be difficult to find, since it also lies under the pisiform.
-The major branches of morphology are plant morphology, which is rarely called phytotomy, and animal morphology, called [[zootomy]] or [[anatomy]].
-The terms morphology and [[anatomy]] are almost synonymous and are often used interchangeably. However, morphology is more likely to be used in relation to plants and comparative anatomy, while the term anatomy is more likely to be used in relation to animals, epecially mammals, and humans in particular. In medicine, morphology more often refers to the study of shape, general appearance, or form of a person's body (see also [[somatotype]]), as distinct from anatomy, which requires dissection to reveal structure.
+The etymology derives from the Latin ''triquetrus'' which means "three-cornered."
-Related words:
+==Surfaces==
-*[[physiognomy]]
+The ''superior surface'' presents a medial, rough, non-articular portion, and a lateral convex articular portion which articulates with the triangular articular disk of the wrist.
-:#the form and structure of natural communities
-:#a person's facial features or expression, especially in relation to the indication of character or ethnic origin.
-[[Category:CZ Live]]
+The ''inferior surface'', directed lateralward, is concave, sinuously curved, and smooth for articulation with the hamate. The dorsal surface is rough for the attachment of ligaments.
-[[Category:Biology Workgroup]]
-[[Category:Health Sciences Workgroup]]
+The ''volar surface'' presents, on its medial part, an oval facet, for articulation with the pisiform; its lateral part is rough for ligamentous attachment.
-[[Category:Anatomy Workgroup]]
+The ''lateral surface'', the base of the pyramid, is marked by a flat, quadrilateral facet, for articulation with the lunate.
+The ''medial surface'', the summit of the pyramid, is pointed and roughened, for the attachment of the ulnar collateral ligament of the wrist.
+== See also ==
+*[[Bone#Terminology|Bone terminology]]
+*[[Terms for anatomical location]]
+==Additional images==
+<gallery>
+ Image:Gray219.png|Bones of the left hand. Volar surface.
+ Image:Gray220.png|Bones of the left hand. Dorsal surface.
+</gallery>
+{{Bones of upper extremity}}
+[[Category:Skeletal system]]
+[[Category:wrist]]
+{{musculoskeletal-stub}}
+[[fr:Os triquetrum]]
+[[nl:Os triquetrum]]
+[[sk:Trojhranná kosť]]
+By comparison, the term "palm" applies to only the palm (the grasping side) of the hand. The Romans actually used the word "palma" for the outstretched palm of the hand.
+==Topics in Anatomy==
+'''SYSTEMIC ANATOMY'''
+Introduction and Systemic Overview
+*Anatomical Nomenclature
+*Basic Structure and Function of Cells
+*Integrating Cells into Tissues
+Systemic Overview
+*Nervous System
+*Blood, Lymphoid Tissues and Haemopoiesis
+*Functional Anatomy of the Musculoskeletal System
+*Smooth Muscle and the Cardiovascular and Lymphatic systems
+*Skin and its Appendages
+*Endocrine System
+*Principles of Hormone Production and Secretion
+*Embryology
+**Embryogenesis
+**Prenatal and Neonatal Growth
+[[Integumentary System]]
+*[[integumentary system]]
+[[Skeletal System]]
+*[[full skeleton]]
+*[[axial skeleton]]
+*[[skull]]
+*[[vertebral column]]
+*[[ribcage]]
+*[[appendicular skeleton]]
+*[[shoulder & arm]]
+*[[hand & wrist]]
+*[[pelvis]]
+*[[leg & ankle]]
+*[[foot]]
+[[Muscular System]]
+*[[full body]]
+*[[muscle histology]]
+*[[head & neck]]
+*[[thorax]]
+*[[shoulder & upper arm]]
+*[[biceps brachii]]
+*[[forearm & hand]]
+*[[abdomen]]
+*[[pelvis]]
+*[[thigh & knee]]
+*[[leg & foot]]
+[[Nervous System]]
+*[[nervous system]]
+*[[brain]]
+*[[spinal cord]]
+*[[autonomic nervous system]]
+*[[eye]]
+*[[ear]]
+*[[nose]]
+[[Endocrine System]]
+*[[endocrine system]]
+*[[hypothalamus & pituitary]]
+*[[thyroid & parathyroids]]
+*[[adrenal glands]]
+*[[pancreas]]
+*[[ovaries]]
+*[[testes]]
+[[Cardiovascular System]] ([[Circulatory System]])
+*[[cardiovascular system]]
+*[[lymphatic system]]
+[[Lymphatic System]]
+[[Immune System]]
+[[Respiratory System]]
+*[[respiratory system]]
+*[[mouth]]
+*[[nose & throat]]
+*[[lung]]
+[[Digestive System]]
+*[[digestive system]]
+*[[alimentary canal]]
+*[[accessory organs]]
+*[[mouth & throat]]
+*[[esophagus & stomach]]
+*[[liver]]
+*[[gallbladder]]
+*[[pancreas & duodenum]]
+*[[small intestine]]
+*[[large intestine]]
+[[Reproductive System]]
+*[[male reproductive systerm]]
+*[[female reproductive system]]
+*[[Excretory System]] ([[Urinary System]])
+*[[urinary system]]
+*[[kidneys]]

User:David Hume/sandbox: Difference between revisions

Latest revision as of 02:43, 22 November 2023

Contents

Surfaces

See also

Additional images

Topics in Anatomy

Navigation menu

User:David Hume/sandbox: Difference between revisions

Latest revision as of 02:43, 22 November 2023

Surfaces

See also

Additional images

Topics in Anatomy

Navigation menu

Search