Head (Latin cranium) the portion of the head is called.

General information

The head is a general characteristic of all vertebrate animals. There are similar developments with e.g. Insects and cancers, with which the upper throat ganglion is protected by the external skeleton. The Parallelentwicklung is still more similar with Cephalopoden (Tintenfischen). These soft animals have a cartilage cap, which protects the brain, and functionally comparable to the brain head is.

Development

the head of differences concerned between humans and anthropoids are based mainly on the fact of complete putting of the human body up and the upright course. The head balances now on the spinal column, so that the neck musculature is no longer so strong with humans and accordingly the head bones are more thin-walled. On the other hand the face head of humans is smaller, is regressed the Kieferpartie and the brain heads further, in order to offer to the larger brain place.

With newborn humans the parts of the brain head are not yet completely and grown together. Between the individual head plates are bone gaps, the Fontanellen. In the course of the first Lebensjahre the Fontanellen and the brain head close completely. At the head seams (Suturen) still the individual disk bones of the brain head are to be identified also with the head of an adult, whereby the seam between both front bone portions itself usually up to 2. Lebensjahr closes. If one or more head seams close prematurely, then one speaks of a Craniosynostose (see also "Kraniosynostose").

With the newborn child the relationship from brain head to face head still 8:1, with the five-year child 4:1, with the adult 2:1 amounts to.

The bones of the head

The head of humans consists of 22-30 with one another bones connected by bone seams. The different data are based on the fact that on the one hand the Stirnbein probably forms from two bone plants, but after the growth conclusion usually as uniform bones shows up, on the other hand the tongue leg and the auditory ossicles among the head bones to be ranked only as required. Anatomically one differentiates between thus that

1. Brain head (lat. Neurocranium), which a sturdy covering around the brain forms, of
2. Face head (lat. Viscerocranium), which forms the basis for the face. As adjective for parts of the face head also kraniofacial (Facies=Gesicht) one uses.

The bones of the brain head

The brain head becomes morphologic into the head roof (Calvaria, and the head basis partitioned. It in an educated manner through

1. unmatched Hinterhauptsbein (lat. OS occipitale)
2. the parietal bone in pairs (lat. OS parietale)
3. the temporal bone in pairs (lat. OS temp-oral)
4. the Keilbein in pairs (lat. OS sphenoidale)
5. the unmatched Siebbein (lat. '' OS ethmoidale)
6. a part of the Stirnbeins (lat. OS frontal)

The whole Stirnbein is assigned by some authors to the brain head.

The brain head is by APPL.-steers with the neck spinal column connected.

The bones of the face head

To the face head belong among other things those bones, which form the eye and nasal cavities and the oral cavity. In detail are:

1. those parts of the Stirnbeins, which along-form the eye socket
2. the yoke leg in pairs (lat. OS zygomaticum)
3. the Oberkiefer (lat. Maxilla), in reality a bone in pairs
4. the Zwischenkieferbein in pairs (lat. OS incisivum), which already merges with humans before the birth with the Oberkiefer
5. the unmatched lower jaw (lat. Mandibula)
6. the nasal bone in pairs (lat. OS nasale)
7. the in pairs (lat. OS lacrimale)
8. the palate leg in pairs (lat. OS palatinum)
9. the unmatched plowshare leg (lat. the Vomer)
10. the unmatched tongue leg (lat. OS hyoideum)
11. the auditory ossicles

See also

• German horizontal, Kraniometrie
• Head deformation
• Jolly Roger (on the Piratenflagge)

Related links

• Head basis surgery

Articles in category "Head"

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