同: 前頭骨

WordNet

relating to or located in the front; "the front lines"; "the front porch"
(meteorology) the atmospheric phenomenon created at the boundary between two different air masses
a sphere of activity involving effort; "the Japanese were active last week on the diplomatic front"; "they advertise on many different fronts"
the side that is seen or that goes first
the side that is forward or prominent (同)front end, forepart
the outward appearance of a person; "he put up a bold front"
the part of something that is nearest to the normal viewer; "he walked to the front of the stage"
confront bodily; "breast the storm" (同)breast
be oriented in a certain direction, often with respect to another reference point; be opposite to; "The house looks north"; "My backyard look onto the pond"; "The building faces the park" (同)look, face
remove the bones from; "bone the turkey before roasting it" (同)debone
the porous calcified substance from which bones are made (同)osseous_tissue
consisting of or made up of bone; "a bony substance"; "the bony framework of the body"
a shade of white the color of bleached bones (同)ivory, pearl, off-white
rigid connective tissue that makes up the skeleton of vertebrates (同)os
of or relating to the front of an advancing mass of air; "frontal rainfall"
a drapery that covers the front of an altar
meeting front to front; "a frontal attack"; "a head-on collision" (同)head-on
belonging to the front part; "a frontal appendage"
of or adjacent to the forehead or frontal bone; "the frontal lobes"
having bones as specified; "his lanky long-boned body"
having had the bones removed; "a boneless rib roast"; "a boned (or deboned) fish" (同)deboned
a percussion instrument consisting of a pair of hollow pieces of wood or bone (usually held between the thumb and fingers) that are made to click together (as by Spanish dancers) in rhythm with the dance (同)castanets, clappers, finger cymbals

PrepTutorEJDIC

《the~》(物の)『前面』,表;(玄関を含む建物の)正面;(…の)最前部《+『of』+『名』》 / 《the~》(本などの)最初の部分 / 〈U〉《しばしばa~》(物事に対する)態度 / 〈C〉(共通目的のための)共同戦線,運動,提携 / 〈C〉(街路・川・湖に面した)土地;《英》(海岸の)遊歩道 / 〈C〉戦線 / 《話》〈C〉世間の目をそらすための人(物);(…の)隠れみの《+『for』+『名』》 / 〈C〉(気象上の)前線 / 〈C〉前部に位置する(ある)もの(ワイシャツの胸当て,前頭部など) / 『正面の』,前の;表の / (発音で)前舌音の / 〈場所が〉…‘に'面する / (…を)…‘の'正面(前面)につける《+『名』+『with』+『名』》 / 《古》〈敵・困難・危険など〉‘に'立ち向かう,直面する / (…に)面する《+『on』(『to,toward,upon』)+『名』》
〈C〉骨 / 〈U〉骨を作っている物質,骨質 / 《複数形で》骨格;死骸(がい) / 〈魚など〉‘の'骨を取る
正面の,前面の
(魚など)骨を取り除いた / (衣服が)(コルセットなどで)骨で張りをつけた[ような]

Wikipedia preview

出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2015/08/12 22:16:37」(JST)

wiki en

The frontal bone or os frontis is a bone in the human skull. The name comes from the Latin word frons (meaning "forehead"). The bone resembles a cockleshell in form, and consists of three portions.^[1] These are the squamous part, the orbital part, and the nasal part.

Structure

Borders

The border of the squama frontalis is thick, strongly serrated, bevelled at the expense of the inner table above, where it rests upon the parietal bones, and at the expense of the outer table on either side, where it receives the lateral pressure of those bones; this border is continued below into a triangular, rough surface, which articulates with the great wing of the sphenoid. The posterior borders of the orbital plates are thin and serrated, and articulate with the small wings of the sphenoid. ^[1]

Coronal suture separates frontal bone and parietal bones.
Sphenofrontal suture separates frontal bone and sphenoid bone.
Zygomaticofrontal suture separates frontal bone and zygomatic bones.
Nasofrontal suture separates frontal bone and nasal bone.
Frontomaxillary suture separates frontal bone and maxilla.

Parts

The three parts of the frontal bone are the squamous part, the orbital part and the nasal part. The squamous part marks the flat and also the biggest part, and the main region of the forehead. The orbital part is the horizontal and second biggest region of the frontal bone. It enters into the formation of the roofs of the orbital and nasal cavities. The nasal, the smallest, part articulates with the nasal bone and the frontal process of the maxilla to form the root of the nose.^[2]

Development

The frontal bone is presumed to be derived from neural crest cells.^[3]

The frontal bone is ossified in membrane from two primary centers, one for each half, which appear toward the end of the second month of fetal life, one above each supraorbital margin. From each of these centers, ossification extends upward to form the corresponding half of the squama, and backward to form the orbital plate. The spine is ossified from a pair of secondary centers, on either side of the middle line; similar centers appear in the nasal part and zygomatic processes.

At birth the bone consists of two pieces, separated by the frontal suture, which is usually obliterated, except at its lower part, by the eighth year, but occasionally persists throughout life. It is generally maintained that the development of the frontal sinuses begins at the end of the first or beginning of the second year, but may begin at birth. The sinuses are of considerable size by the seventh or eighth year, but do not attain their full proportions until after puberty.

Frontal bone at newborn.
Frontal bone at birth.
Frontal bone orbital part at newborn.

Other animals

In most vertebrates, the frontal bone is paired, rather than presenting the single, fused structure found in humans (see frontal suture). It typically lies on the upper part of the head, between the eyes, but in many non-mammalian animals it does not form part of the orbital cavity. Instead, in reptiles, bony fish and amphibians it is often separated from the orbits by one or two additional bones not found in mammals. These bones, the prefrontals and postfrontals, together form the upper margin of the eye sockets, and lie to either side of the frontal bones.^[4]

Dinosaurs

The frontal bone is one of the principal paired mid-line bones in dinosaur skulls. This bone is part of the skull roof, which is a set of bones that cover the brain, eyes and nostrils. The frontal makes contact with several other bones in the skull. The anterior part of the bone articulates with the nasal bone and the prefrontal bone. The posterior part of the bone articulates with the postorbital bone and the parietal bone. This bone defines all of part of the upper margin of the orbit.

Additional Images

Position of the frontal bone (highlighted in green). Animation.
Frontal bone (highlighted in green).
Skull showing keyhole gunshot trauma on frontal bone, at Civil War (1861-1865).
Inner surface of the frontal bone (highlighted in green). Parietal bones are removed.
Inner surface of the frontal bone (highlighted in green). Parietal bones are removed.
Outer and inner surface of frontal bone. Animation.
Frontal bone. Inferior surface.

References

This article incorporates text in the public domain from the 20th edition of Gray's Anatomy (1918)

^ ^a ^b Gray's Anatomy (1918).
^ https://www.kenhub.com/en/library/anatomy/the-frontal-bone
^ Kirby, ML; Waldo, KL. Circulation (1990) 82:332-340.
^ Romer, Alfred Sherwood; Parsons, Thomas S. (1977). The Vertebrate Body. Philadelphia, PA: Holt-Saunders International. pp. 226–241. ISBN 0-03-910284-X.

External links

Anatomy photo:23:os-0101 at the SUNY Downstate Medical Center
Anatomy diagram: 34256.000-1 at Roche Lexicon - illustrated navigator, Elsevier

UpToDate Contents

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1. 骨パジェット病の臨床症状および診断 clinical manifestations and diagnosis of paget disease of bone
2. 骨転移を有する成人患者の疫学、臨床所見、診断、およびマネージメントの概要 overview of the epidemiology clinical presentation diagnosis and management of adult patients with bone metastasis
3. 小児癌患者の骨に関する問題 bone problems in childhood cancer patients
4. 慢性腎臓疾患に関連する無形成骨症 adynamic bone disease associated with chronic kidney disease
5. Osteoclast inhibitors for patients with bone metastases from breast, prostate, and other solid tumors

English Journal

The C9ORF72 expansion does not affect the phenotype in Nasu-Hakola disease with the DAP12 mutation.

Solje E1, Hartikainen P2, Valori M3, Vanninen R4, Tiihonen J5, Hakola P6, Tienari PJ3, Remes AM7.
Neurobiology of aging.Neurobiol Aging.2014 Jul;35(7):1780.e13-7. doi: 10.1016/j.neurobiolaging.2014.01.149. Epub 2014 Feb 5.
Nasu-Hakola disease (NHD) is a rare autosomal recessive disease that is characterized by cyst-like bone lesions and pathologic fractures combined with an early-onset frontal type of dementia. Mutations in DNAX-activation protein 12 (DAP12) and triggering receptor expressed on myeloid cells 2 (TREM2)
PMID 24612676

Juvenile Psammomatoid Ossifying Fibroma of Maxillary Sinus: Case Report with Review of Literature.

Ranganath K1, Kamath SM2, Munoyath SK1, Nandini HV3.
Journal of maxillofacial and oral surgery.J Maxillofac Oral Surg.2014 Jun;13(2):109-114. Epub 2013 Feb 7.
Juvenile psammomatoid ossifying fibroma is a rare benign fibro-osseous tumor of the gnathic and extragnathic craniofacial bones, particularly the periorbital, frontal and ethmoid bones. It is slowly progressive with aggressive local growth, invasion and destruction of the surrounding tissue, bone er
PMID 24822000

Extragnathic Sino-Orbital Myxoma: An Extremely Rare Tumor at an Even Rarer Site.

Ali MJ1, Saha D, Vemuganti GK, Naik MN.
Ophthalmic plastic and reconstructive surgery.Ophthal Plast Reconstr Surg.2014 May 14. [Epub ahead of print]
Myxomas are rare benign tumors of primitive mesenchymal origin that usually arise from the soft tissues and occasionally from the bones. Bony myxomas predominantly arise from the jaw bone and hence are also known as gnathic myxomas. Any other bony myxomas are termed as extragnathic. In view of rarit
PMID 24833439

Japanese Journal

メダカ咽頭歯・咽頭骨にみられる硬組織間接着界面の形態学的特徴

松村馨,土門卓文,飯田順一郎
北海道歯学雑誌 35(2), 133-140, 2015-03
… 哺乳類における骨接合線やセメント象牙境などの硬組織間接着界面は脱灰標本で過酸化ヨウ素シッフ反応（periodic acid-SCIFF）（PAS）陽性反応を示し，bone sialoprotein，osteopontin，glycosaminoglycansが局在し，これら非膠原性タンパクは硬組織間の接着に関与すると報告されている．骨組織は系統発生学的に硬骨魚類よりみられることから，その骨接合線の構造を理解することは哺乳類におけるその意義を理解する上で重要である …
NAID 120005572449

A Case of Blood Boil in the Frontal Sinus

Nakazato Akira,Tsubota Masahito,Abe Hideharu,Shojaku Hideo,Akioka Naoki,Tomita Takahiro,Nagai Shouichi,Kuroda Satoshi,Hayashi Shinichi,Imura Jouji
耳鼻咽喉科臨床　補冊 141(0), 40-41, 2015
… The blood boil is a benign hemorrhagic pseudotumor that usually arises in the sinonasal tract, particularly the maxillary sinus and blood boils in the frontal sinus are very rare. … We experienced a rare case of a blood boil in the frontal sinus. … CT and MRI showed a large mass extending from the left frontal sinus to the orbital roof with bone erosion. …
NAID 130005077953

経鼻内視鏡下切除術を施行した幼児髄膜脳瘤症例

寳地信介,武永芙美子,髙橋里沙,橋田光一,高橋麻由,鈴木秀明
日本鼻科学会会誌 54(1), 18-24, 2015
脳瘤は先天的／後天的な頭蓋骨の欠損孔から頭蓋内容が頭蓋外に脱出して嚢瘤を形成した疾患で，脳瘤の内容が髄膜と髄液のみであれば髄膜瘤（meningocele），内部に逸脱した脳組織が含まれる場合を髄膜脳瘤（meningoencephalocele）と呼ぶ。今回，前頭蓋底から鼻腔へと脱出した髄膜脳瘤症例に対して，経鼻内視鏡下切除術を施行し，良好な経過を得ることが出来たので報告する。症例は1歳幼児。中耳炎 …
NAID 130005072813

Related Pictures

★リンクテーブル★

リンク元	「前頭骨」
関連記事	「frontal」「front」「bone」

「前頭骨」

Frontal bone
	19th Century skull showing sword-blade trauma on frontal bone.
	Position of the frontal bone (highlighted in green).
Details
Latin	Os frontale
Articulations	Twelve bones: the sphenoid, the ethmoid, the two parietals, the two nasals, the two maxillæ, the two lacrimals, and the two zygomatics
Identifiers
Gray's	p.135
MeSH	A02.835.232.781.375
TA	A02.1.03.001
FMA	52734
	Anatomical terms of bone