Posts Tagged 'venous sinuses'

Craniovascular traits

The vascular imprints on the endocranial surface, the diploic channels within the vault bones, and the emissary foramina of the cranial cavity, are used to make inferences on blood flow in archaeological and paleontological samples. Unfortunately, basic information on many of these craniovascular traits (variation, distribution, homology, development, influential factors and even functions) is still poor for our own species. It sounds unpractical to investigate a feature in a few broken bones of an extinct species, if the same information is lacking for many billions living individuals. A former study was focused on the parietal bone. Now we have published a comprehensive endocranial survey on these traits in two modern European populations, to supply more information on their variability and on the influences of skull size and proportions, asymmetry, or sex. Blood flow exchange within the endocranial cavity may be relevant for thermal regulation and brain cooling. The final aim is to establish what functional or structural factors are involved in the morphology of these vessels and of their bony traces, as to interpret differences in extinct species or past populations. Many of these features bridge interests in anthropology and medicine.

Neanderthal’s visual cortex

A recent study published by Antonio García Tabernero addresses issues about the morphology of the occipital lobes in Neanderthals. It is an anatomical description of a new occipital fragment from El Sidrón, and a morphological analysis of the Neanderthal occipital variation. Neanderthals display more occipital asymmetries than other hominids, including in the vascular pattern of the venous sinuses. They have been also hypothesized to have larger occipital cortex when compared with modern humans. It remains to be evaluated whether differences in the occipital lobe morphology can suggest distinct functional capacity, and here is a stimulating article right on this topic. However, it should be considered the possibility that occipital proportions in Neanderthals are not a derived feature, but a plesiomorph human (Homo) condition, being modern humans the ones who depart from this scheme.


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  • Frontal bone, parietal bone
    The skull provides a protection for the brain, and thus its composition and structure are of interest in biomechanics, for biomedical engineers and … for the Army too. Cranial vault bones consist of three layers of bone tissue – the inner and outer tables that are made of cortical bone tissue, and the cancellous bone […]

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  • The Last Homo erectus
    Last week, in Nature, University of Iowa anthropologist Russell Ciochon and colleagues published new dates on fossils and sediment layers …Continue reading →

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  • Researchers develop non-invasive deep brain stimulation method
    Researchers at MIT have developed a new method of electrically stimulating deep brain tissues without opening the skullSince 1997, more than 100,000 Parkinson’s Disease patients have been treated with deep brain stimulation (DBS), a surgical technique that involves the implantation of ultra-thin wire electrodes. The implanted device, sometimes referred to as […]

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