Fibrous joint

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Fibrous joint_table_infobox_0

Fibrous jointFibrous joint_header_cell_0_0_0
DetailsFibrous joint_header_cell_0_1_0
IdentifiersFibrous joint_header_cell_0_2_0
LatinFibrous joint_header_cell_0_3_0 Articulatio fibrosa, junctura fibrosaFibrous joint_cell_0_3_1
TA98Fibrous joint_header_cell_0_4_0 Fibrous joint_cell_0_4_1
TA2Fibrous joint_header_cell_0_5_0 Fibrous joint_cell_0_5_1
FMAFibrous joint_header_cell_0_6_0 Fibrous joint_cell_0_6_1

In anatomy, fibrous joints are joints connected by fibrous tissue, consisting mainly of collagen. Fibrous joint_sentence_0

These are fixed joints where bones are united by a layer of white fibrous tissue of varying thickness. Fibrous joint_sentence_1

In the skull the joints between the bones are called sutures. Fibrous joint_sentence_2

Such immovable joints are also referred to as synarthroses. Fibrous joint_sentence_3

Types Fibrous joint_section_0

Most fibrous joints are also called "fixed" or "immovable". Fibrous joint_sentence_4

These joints have no joint cavity and are connected via fibrous connective tissue. Fibrous joint_sentence_5

The skull bones are connected by fibrous joints called sutures. Fibrous joint_sentence_6

In fetal skulls the sutures are wide to allow slight movement during birth. Fibrous joint_sentence_7

They later become rigid (synarthrodial). Fibrous joint_sentence_8

Some of the long bones in the body such as the radius and ulna in the forearm are joined by a syndesmosis (along the interosseous membrane). Fibrous joint_sentence_9

Syndemoses are slightly moveable (amphiarthrodial). Fibrous joint_sentence_10

The distal tibiofibular joint is another example. Fibrous joint_sentence_11

A gomphosis is a joint between the root of a tooth and the socket in the maxilla or mandible (jawbones). Fibrous joint_sentence_12

Sutures Fibrous joint_section_1

This section is about joints in the bones of the skull. Fibrous joint_sentence_13

For stitches holding tissues together, see Surgical suture. Fibrous joint_sentence_14

For natural structures of a wide range of animals, see Suture (anatomy). Fibrous joint_sentence_15

For other uses, see Suture (disambiguation). Fibrous joint_sentence_16

A suture is a type of fibrous joint that is only found in the skull (cranial suture). Fibrous joint_sentence_17

The bones are bound together by Sharpey's fibres. Fibrous joint_sentence_18

A tiny amount of movement is permitted at sutures, which contributes to the compliance and elasticity of the skull. Fibrous joint_sentence_19

These joints are synarthroses. Fibrous joint_sentence_20

It is normal for many of the bones of the skull to remain unfused at birth. Fibrous joint_sentence_21

The fusion of the skull's bones before birth is known as craniosynostosis. Fibrous joint_sentence_22

The term "fontanelle" is used to describe the resulting "soft spots". Fibrous joint_sentence_23

The relative positions of the bones continue to change during the life of the adult (though less rapidly), which can provide useful information in forensics and archaeology. Fibrous joint_sentence_24

In old age, cranial sutures may ossify (turn to bone) completely. Fibrous joint_sentence_25

The joints between the teeth and jaws (gomphoses) and the joint between the mandible and the cranium, the temporomandibular joint, form the only non-sutured joints in the skull. Fibrous joint_sentence_26

Types of sutures Fibrous joint_section_2

Fibrous joint_unordered_list_0

  • Plane sutures – edges of the bones are flush with each other as in a normal butt joint. Eg: Internasal suture.Fibrous joint_item_0_0
  • Limbous sutures – edges are bevelled so the plane of the suture is sloping as in a mitre joint. Eg: Temporo-parietal suture.Fibrous joint_item_0_1
  • Schindylesis – formed by two bones fitting into each other similar to a bridle joint. Eg: Palatomaxillary suture.Fibrous joint_item_0_2
  • Denticulate sutures – the edges slot into each other as in a finger joint. Eg: Lambdoid suture.Fibrous joint_item_0_3
  • Serrate sutures – similar to a denticulate suture but the interlocking regions are serrated rather than square. Eg: Coronal suture.Fibrous joint_item_0_4

List of sutures Fibrous joint_section_3

Most sutures are named for the bones they articulate, but some have special names of their own. Fibrous joint_sentence_27

Visible from the side Fibrous joint_section_4

Fibrous joint_unordered_list_1

Visible from the front or above Fibrous joint_section_5

Fibrous joint_unordered_list_2

Visible from below or inside Fibrous joint_section_6

Fibrous joint_unordered_list_3

Credits to the contents of this page go to the authors of the corresponding Wikipedia page: joint.