More precuneus

One more paper on precuneus morphology. The precuneus displays a remarkable (and definitely striking) variation in its size and shape in adult humans. One can think that such geometric diversity is due to cranial deformation and constraints, and not to real (primary) brain differences. And, if real cortical differences are involved, one can think that its longitudinal and vertical extensions are the result of the same process: overall larger (or smaller) precuneus. In this new study, we have analyzed its longitudinal, vertical and lateral proportions, as to see whether there is a unique morphological pattern, or else if those directions of growth are independent. Results support the latter conclusion: its relative development in length is not patently associated with its relative development in height or width. This may suggest that distinct areas (and functions) are involved. And, of course, that such variations are due to real (primary) brain features, and not to (secondary) deformation due to cranial factors. It remains to be evaluated to what extent the grey or the white matter do generate these spatial variations, and which specific areas are involved. The precuneus is much more developed and expanded in humans when compared with other primates, including apes, and its corresponding regions appear also larger in modern humans when compared with extinct human species, including Neandertals. The homology of its areas, when comparing humans, apes and monkeys, remain to be fully understood, although new stimulating information is now available, in this sense. Previous articles on the same topic dealt with precuneus general shape, sulcal patterns, population variability, brain-braincase relationships, primate variations and cortical surface area. Here a review on the evolution of the parietal lobes. The precuneus is mainly involved in visuospatial integration, and it represents a central node for the integration between brain, body and environment, as well as a crucial center for body cognition.

[Full-text View-only PDF]

0 Responses to “More precuneus”



  1. Leave a Comment

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s




Enter your email address to follow this blog and receive notifications of new posts by email.

RSS Brain News

RSS Cognitive archaeology

  • October’s Featured Book
    This month’s featured book that the faculty of the Center for Cognitive Archaeology want to highlight is First Sculpture: Handaxe to Figure Stone by Tony Berlant and UCCS Distinguished Professor Thomas Wynn. First Sculpture: Handaxe to Figure Stone, by Tony Berlant and Thomas Wynn, is the catalogue of the first museum exhibition to present ancient … Continue […]

RSS The Skull Box

  • Meningeal Lymphatic Vessels
    Blood and lymphatic networks play important role in maintaining the body homeostasis. The lymphatic vessels in the cerebral dura mater were first mentioned in the work of the Italian physician Paolo Mascagni in 1787 (Bucchieri et al. 2015), and then rediscovered in 2015 by two independent teams – Aspelund et al. (2015) and Louveau et […]

RSS Anthropology

  • The Genetics of the Transatlantic Slave Trade
    Between the 16th and 19th centuries, approximately 12.5 million people were violently deported from their homes in Africa to the Americas by slavers. As current events have shown, the destruction of communities, cultures and families have had everlasting ramifications which are felt a century and half later. Some of the less tangible pains is the... Continue […]

RSS Human Evolution

  • An error has occurred; the feed is probably down. Try again later.

RSS Neurophilosophy

  • 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 […]

Disclaimer

This blog publishes texts and comments of the author, which can not be referred to institutions or contexts outside of the blog itself. The published material may be partly derived or reported from the Web, and therefore evaluated in the public domain. If some content violates copyright or if it is considered inappropriate, please contact me, to promptly remove it. On the other hand, please cite this source whenever using images or texts from this website.

%d bloggers like this: