Neurocranium

Neurocranium
Illu cranial bones2.jpg
Neurocranium (note: diagram uses the term "cranial bones" in the more narrow sense.)
Schädelbasis1.jpg
Base of skull
Gray's subject #30 128

In mammals, the neurocranium or braincase is the back part of the skull and houses the brain. In front of it is the interorbital region. The size of the braincase is variable among mammals. The roof may contain ridges such as the temporal crests. Below the braincase is a complex of foramina (openings) and bones, including the foramen magnum which houses the neural spine. The auditory bullae, located in the same region, aid in hearing.[1] In humans, it is the upper portion of the skull.

The neurocranium is formed by the endocranium, the lower portions of the cranial vault, and the skull roof. These are not fused in fishes, and a proper neurocranium is only found in land vertebrates.

In humans, it includes the following bones:

The term "cranium" can be ambiguous, in that it can refer to the neurocranium, or the neurocranium and the Facial skeleton.

Neurocranium

Embryonic origins

The neurocranium arises from paraxial mesoderm. There is also some contribution of ectomesenchyme. In Chondrichthyes and other cartilaginous vertebrates this portion of the cranium does not ossify; it is not replaced via endochondral ossification.

See also

References

  1. ^ Elbroch, M. 2006. Animal skulls: A guide to North American species. Stackpole Books, pp. 20–22. ISBN 9780811733090

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  • Neurocranium —   [lateinisch cranium, von griechisch kraníon »Schädel«] das, s/...nia und ...ni |en, Teil des Schädels, der das Gehirn umgibt. * * * Neu|ro|cra|ni|um: ↑Neurokranium. Neu|ro|kra|ni|um, Neurocranium, das; s, ...ia [zu griech. kraníon = Schädel]… …   Universal-Lexikon

  • Neurocranium — ⇒ Schädel …   Deutsch wörterbuch der biologie

  • Neurocranium — vgl. Neurokranium …   Das Wörterbuch medizinischer Fachausdrücke

  • Neurocranium — Kretominoischer Schädel Primatenschädel im Vergleich Als Schädel (lateinisch cranium von grie …   Deutsch Wikipedia

  • neurocranium — Those bones of the skull enclosing the brain, as distinguished from the bones of the face. SYN: brain box, braincase, cranial vault, cranium cerebrale, cerebral cranium. [neuro + G. kranion, skull] cartilaginous n. in the embryo, that …   Medical dictionary

  • Neurocranium — smegeninė kaukolės dalis statusas T sritis gyvūnų raida, augimas, ontogenezė, embriologija atitikmenys: lot. Neurocranium ryšiai: platesnis terminas – kaukolė siauresnis terminas – kaukolės skliautas siauresnis terminas – pirmykštis smegenų… …   Veterinarinės anatomijos, histologijos ir embriologijos terminai

  • Neurocranium — smegeninė kaukolės dalis statusas T sritis embriologija atitikmenys: lot. Neurocranium ryšiai: platesnis terminas – ašiniai griaučiai siauresnis terminas – kaukolės skliautas siauresnis terminas – pirmykštis smegenų dangalas siauresnis terminas – …   Medicininės histologijos ir embriologijos vardynas

  • neurocranium — (plural neurocrania)) the portion of the skull surrounding the brain, including the elements that surround the olfactory, optic, orbital or sphenotic, and otic or auditory capsules and the anterior end of the notochord (endocranium) and the… …   Dictionary of ichthyology

  • neurocranium — noun The part of the cranium that encloses the brain …   Wiktionary

  • Neurocranium — Neu|ro|cra|ni|um 〈n.; Gen.: s, Pl.: ni|en; Anat.〉 Teil des Schädels, der das Gehirn umschließt; oV …   Lexikalische Deutsches Wörterbuch

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