二次骨化点
WordNet
- of or belonging to neither the right nor the left politically or intellectually
- a building dedicated to a particular activity; "they were raising money to build a new center for research" (同)centre
- (American football) the position of the player on the line of scrimmage who puts the ball in play; "it is a centers responsibility to get the football to the quarterback"
- a position on a basketball team of the player who participates in the jump that starts the game
- the position on a hockey team of the player who participates in the face off at the beginning of the game
- a place where some particular activity is concentrated; "they received messages from several centers" (同)centre
- the sweet central portion of a piece of candy that is enclosed in chocolate or some other covering (同)centre
- the object upon which interest and attention focuses; "his stories made him the center of the party" (同)centre, center of attention, centre of attention
- an area that is approximately central within some larger region; "it is in the center of town"; "they ran forward into the heart of the struggle"; "they were in the eye of the storm" (同)centre, middle, heart, eye
- a point equidistant from the ends of a line or the extremities of a figure (同)centre, midpoint
- a cluster of nerve cells governing a specific bodily process; "in most people the speech center is in the left hemisphere" (同)centre, nerve_center, nerve centre
- (football) the person who plays center on the line of scrimmage and snaps the ball to the quarterback; "the center fumbled the handoff" (同)snapper
- (basketball) the person who plays center on a basketball team
- (ice hockey) the person who plays center on a hockey team
- politically moderate persons; centrists
- the middle of a military or naval formation; "they had to reinforce the center"
- move into the center; "That vase in the picture is not centered" (同)centre
- equally distant from the extremes (同)halfway, middle, midway
- not of major importance; "played a secondary role in world events"
- the defensive football players who line up behind the linemen
- being of second rank or importance or value; not direct or immediate; "the stone will be hauled to a secondary crusher"; "a secondary source"; "a secondary issue"; "secondary streams"
- belonging to a lower class or rank
- depending on or incidental to what is original or primary; "a secondary infection"
- the calcification of soft tissue into a bonelike material
- the developmental process of bone formation
- the process of becoming rigidly fixed in a conventional pattern of thought or behavior
- hardened conventionality (同)conformity
- a fractional monetary unit of several countries
- (American football) putting the ball in play by passing it (between the legs) to a back; "the quarterback fumbled the snap" (同)snap
PrepTutorEJDIC
- 『第2の』,2番目の;(…の)次の《+『to』+『名』》 / 派生的な,二次的な,あまり重要でない / 中等学校[教育]の / 二次電流の
- 〈U〉骨化 / 〈C〉骨化して部分
- 〈C〉『セント』(1ドルの1/100;米国・カナダの貨幣単位;《略》￠) / 〈C〉1セント銅貨 / 〈U〉(単位としての)100
Wikipedia preview
出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2016/08/13 08:12:59」(JST)
[Wiki en表示]
|
|
This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. (May 2011) (Learn how and when to remove this template message) |
| Ossification center |
|
Section of fetal bone of cat. ir. Irruption of the subperiosteal tissue. p. Fibrous layer of the periosteum. o. Layer of osteoblasts. im. Subperiosteal bony deposit.
|
| Details |
| Identifiers |
| Latin |
centrum ossificationis |
Dorlands
/Elsevier |
12227335 |
| TA |
A02.0.00.043 |
| FMA |
75436 |
| Anatomical terminology
[edit on Wikidata]
|
The first step in ossification of the cartilage is that the cartilage cells, at the point where ossification is commencing and which is termed an ossification center, enlarge and arrange themselves in rows.[1]
The matrix in which they are imbedded increases in quantity, so that the cells become further separated from each other.
A deposit of calcareous material now takes place in this matrix, between the rows of cells, so that they become separated from each other by longitudinal columns of calcified matrix, presenting a granular and opaque appearance.
Here and there the matrix between two cells of the same row also becomes calcified, and transverse bars of calcified substance stretch across from one calcareous column to another.
Thus there are longitudinal groups of the cartilage cells enclosed in oblong cavities, the walls of which are formed of calcified matrix which cuts off all nutrition from the cells; the cells, in consequence, atrophy, leaving spaces called the primary areolæ.
Types of ossification centers
There are two types of ossification centers - primary and secondary.
A primary ossification center is the first area of a bone to start ossifying. It usually appears during prenatal development in the central part of each developing bone. In long bones the primary centers occur in the diaphysis/shaft and in irregular bones the primary centers occur usually in the body of the bone. Most bones have only one primary center (e.g. all long bones) but some irregular bones such as the os coxa (hip) and vertebrae have multiple primary centers.
A secondary ossification center is the area of ossification that appears after the primary ossification center has already appeared - most of which appear during the postnatal and adolescent years. Most bones have more than one secondary ossification center. In long bones, the secondary centres appear in the epiphyses.
References
This article incorporates text in the public domain from the 20th edition of Gray's Anatomy (1918)
- ^ Gray and Spitzka (1910), page 44.
Bibliography
- Gray, Henry; Spitzka, Edward Anthony (1910). Anatomy, descriptive and applied. the University of California: Lea & Febiger.
|
Development of bone
|
|
| Ossification |
- Triradiate cartilage
- Limb development
- Apical ectodermal ridge
- Zone of polarizing activity
- Sclerotome
- Myotome
- Septum transversum
|
UpToDate Contents
全文を閲覧するには購読必要です。 To read the full text you will need to subscribe.
English Journal
- Evolution of callus tissue behavior during stable distraction osteogenesis.
- Meyers N1, Schülke J2, Ignatius A2, Claes L2.
- Journal of the mechanical behavior of biomedical materials.J Mech Behav Biomed Mater.2018 Sep;85:12-19. doi: 10.1016/j.jmbbm.2018.05.017. Epub 2018 May 24.
- PMID 29803766
- Secondary Ossification Center Appearance and Closure in the Pelvis and Proximal Femur.
- Parvaresh KC1, Upasani VV1,2, Bomar JD2, Pennock AT1,2.
- Journal of pediatric orthopedics.J Pediatr Orthop.2018 Sep;38(8):418-423. doi: 10.1097/BPO.0000000000000836.
- PMID 27442214
- Accuracy of Virtual Surgical Planning in Treatment of Temporomandibular Joint Ankylosis Using Distraction Osteogenesis: Comparison of Planned and Actual Results.
- Chen K1, Xiao D2, Abotaleb B3, Chen H1, Li Y4, Zhu S5.
- Journal of oral and maxillofacial surgery : official journal of the American Association of Oral and Maxillofacial Surgeons.J Oral Maxillofac Surg.2018 Aug 7. pii: S0278-2391(18)30764-X. doi: 10.1016/j.joms.2018.07.003. [Epub ahead of print]
- PMID 30092217
Japanese Journal
- 20 歳以下の肩甲骨二次骨化核に対する CT 画像評価
- 藤井 幸治,武田 芳嗣,宮武 克年
- 肩関節 36(2), 295-297, 2012
- … A few studies have investigated the age ranges of the appearance and fusion of the secondary ossification centers (2<SUP>nd</SUP> …
- NAID 130002103674
- Biomechanical rationale of ossification of the secondary ossification center on apophyseal bony ring fracture: A biomechanical study
- Faizan Ahmad,Sairyo Koichi,Goel Vijay K.,Biyani Ashok,Ebraheim Nabil
- CLINICAL BIOMECHANICS 22(10), 1063-1067, 2007
- NAID 120004630832
- Secondary medulla oblongata involvement following middle cervical spinal cord injury associated with latent traumatic instability in a patient with ossification of the posterior longitudinal ligament
- Sudo Hideki,Taneichi H.,Kaneda K.
- Spinal Cord 44(2), 126-129, 2006-02
- … Study design: A case report.Objectives: To report a rare case of extension of edema and hemorrhage from initial C4–5 spinal injury to the medulla oblongata.Setting: Center for Spinal Disorders and Injuries, Bibai Rosai Hospital, Japan.Methods: A 68-year-old man with ossification of the posterior longitudinal ligament (OPLL) had sustained tetraplegia after tumbling over a stone. …
- NAID 120000957874
Related Links
- secondary ossification center [TA] center of bone formation appearing later than the punctum ossificationis primarium, usually in epiphysis. Synonym(s): centrum ossificationis secundarium [TA], punctum ossificationis secundarium, secondary center of ossification ...
- Secondary ossification centers THE SECONDARY CENTERS APPEAR, during the first years of postnatal life, in the epiphyses of the bone (at the ends of the bone) Epiphyseal cartilage cells hypertrophy, and vascular connective ...
★リンクテーブル★
[★]
- 英
- secondary ossification center
- 関
- 骨化点
[★]
- (地位・価値・重要性などが)第2の、2番目の、(～の)次の(to)。二次的な、従位の
- Postmortem examination of patients with such obstructions without a history of clinical manifestations of myocardial ischemia often shows macroscopic scars secondary to MI in regions supplied by diseased coronary arteries, with or without collateral circulation.
- in the past the commonest cause of death has been venous thrombosis followed by infection secondary to severe neutropenia and hemorrhage secondary to severe thrombocytopenia.(HIM.661)(重度の好中球減少に次ぐ感染と血小板減少に次ぐ出血に続発する静脈血栓症が昔の最も一般的な死因であった)
[★]
- 関
- central、centre、centro、centrum、hub、medial、middle
[★]
骨形成