fossa cranii posterior

後頭蓋窩

WordNet

1. located at or near or behind a part or near the end of a structure
2. largest carnivore of Madagascar; intermediate in some respects between cats and civets (同)fossa cat, Cryptoprocta ferox
3. monotypic genus of Madagascar civets closely related to palm civets (同)genus Fossa
4. a capacity unit used for measuring fresh herring

PrepTutorEJDIC

1. 《名詞の前にのみ用いて》(生物学的に,位置が)後ろの,後部の / (時間・順序が)後の;(…より)後の《+『to』+『名』》(later) / しり(buttocks)

Wikipedia preview

出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2013/05/08 13:48:39」(JST)

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Posterior cranial fossa
Base of the skull. Upper surface. The Posterior cranial fossa is labeled in green.
Latin	fossa cranii posterior
Gray's	subject #47 192
MeSH	Cranial+Fossa,+Posterior

The posterior cranial fossa is part of the intracranial cavity, located between the foramen magnum and tentorium cerebelli. It contains the brainstem and cerebellum.

This is the most inferior of the fossae. It houses the cerebellum, medulla and pons. Anteriorly it extends to the apex of the petrous temporal. Posteriorly it is enclosed by the occipital bone. Laterally portions of the squamous temporal and mastoid part of the temporal bone form its walls.

Features

Foramen magnum

See main article at Foramen magnum

The most conspicuous, large opening in the floor of the fossa. It transmits the medulla, the ascending portions of the spinal accessory nerve (XI), and the vertebral arteries.

Internal acoustic meatus

Lies in the anterior wall of the posterior cranial fossa. It transmits the facial (VII) and vestibulocochlear (VIII) cranial nerves into a canal in the petrous temporal bone.

Jugular foramen

Lies between the inferior edge of the petrous temporal bone and the adjacent occipital bone and transmits the internal jugular vein (actually begins here), the glossopharyngeal (IX), the vagus (X) and the accessory (XI) nerves.

Anterior condylar (hypoglossal) canal

Lies at the anterolateral margins of the f. magnum and transmits the hypoglossal (XII) nerve.

Other

Also visible in the posterior cranial fossa are depressions caused by the venous sinuses returning blood from the brain to the venous circulation: Right and left transverse sinuses which meet at the confluence of sinuses (marked by the internal occipital protuberance).

The transverse sinuses pass horizontally from the most posterior point of the occiput.

Where the apex of the petrous temporal meets the squamous temporal, the transverse sinuses lead into sigmoid (S-shaped) sinuses (one on each side).

These pass along the articulation between the posterior edge of the petrous temporal and the anterior edge of the occipital bones to the jugular foramen where the sigmoid sinus becomes the internal jugular vein.

Note that a superior petrosal sinus enters the junction of the transverse and sigmoid sinuses. Also an inferior petrosal sinus enters the sigmoid sinus near the jugular foramen.

The posterior cranial fossa is formed in the endocranium, and holds the most basal parts of the brain.

Additional images

• Posterior cranial fossa at human foetus

• Base of skull

• Posterior cranial fossa

• Posterior cranial fossa

• A tumor of the posterior fossa leading to mass effect and shift of the fourth ventricle

See also

• Anterior cranial fossa
• Middle cranial fossa

External links

• SUNY Labs 22:os-0803

UpToDate Contents

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English Journal

• Expression of TrkB and BDNF in human cochlea-an immunohistochemical study.

• Liu W, Kinnefors A, Bostrom M, Rask-Andersen H.SourceDepartment of Otolaryngology, Uppsala University Hospital, 75185, Uppsala, Sweden, lwoo24@gmail.com.
• Cell and tissue research.Cell Tissue Res.2011 Jul 8. [Epub ahead of print]
• Surgical human cochlear specimens were obtained during the removal of large posterior cranial fossa meningioma by a transcochlear approach in which the cochlea was removed for maximal exposure of the tumor and protection of important structures, such as the brainstem, cranial nerves, and pivotal blo
• PMID 21739244

• Comparison of permanent hair loss in children with standard risk PNETS of the posterior fossa following radiotherapy alone or chemotherapy and radiotherapy after surgical resection.

• Rogers S, Donachie P, Sugden E, Sharpe G, English M, Robinson K, Saran F.SourceRoyal Marsden Hospital, Sutton, Surrey, UK.
• Pediatric blood & cancer.Pediatr Blood Cancer.2011 Jul 8. doi: 10.1002/pbc.22992. [Epub ahead of print]
• Hair loss was compared between surgery followed by craniospinal radiotherapy (CSRT) or chemotherapy then CSRT (C-CSRT) for medulloblastoma. The proportion of patients exhibiting hair loss in the cranial field was 70.0% (C-CSRT) versus 30.0% (CSRT) (95% CI: 14.7% to 58.9%; P?=?0.002). The C-CSRT
• PMID 21744477

Related Links

• Posterior cranial fossa - Wikipedia, the free encyclopedia

Base of the skull. Upper surface. The Posterior cranial fossa is labeled in green. Latin, fossa cranii posterior ... The posterior cranial fossa is part of the intracranial cavity, located between the foramen magnum and tentorium ...

Related Pictures

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★リンクテーブル★

リンク元	「後頭蓋窩」
関連記事	「posterior」

「後頭蓋窩」

　　[★]

英

posterior cranial fossa, posterior fossa

ラ

fossa cranii posterior

関

頭蓋窩

• 小脳、脳幹(橋、延髄)

「posterior」

　　[★]

• adj.

• 後側の、後方の、後の

関

after、afterward、afterwards、backward、behind、following、late、post、posteriorly、subsequent