New anatomical study of the human precuneus with geometric models

New anatomical study of the human precuneus with geometric models
Precuneus morphology. Credit: E. Bruner et al 2020

Emiliano Bruner, a paleoneurologist at the Centro Nacional de Investigación sobre la Evolución Humana (CENIEH), has just published a paper on the morphology of the precuneus in adult humans, which concludes that the variations in its length, height and thickness in the cerebral cortex are independent, suggesting that different cortical areas are involved in its growth, as well as in the differences between individuals that can be observed.

These differences are apparently related to the development of the cortical surface of the brain itself, and not to a deformation of the cranial cavity due to spatial constraints on the cranium. In the , this evidence is discussed within the framework of possible anatomical correspondences between human brain areas and the same areas described in other primates, whose functions and similarities still remain to be clarified.

To conduct this analysis, magnetic resonance scans of 50 individuals of both sexes and spatial models of cerebral geometry were used.

More developed in humans

The precuneus is the most medial region of the superior parietal lobules. It is particularly variable in its shape and size among adult individuals, and is much more highly developed in humans than in other primates. "The corresponding areas are also better developed in our species when we compare ourselves with other extinct hominids," states Bruner.

At the , the precuneus is principally involved in integrating the somatic information of the body with , coordinating the body at the physical, chronological and social levels, and generating a involved in the imagination and the capacity for simulation.

This paper, published in collaboration with Ana Sofia Pereira-Pedro in the journal Brain Structure and Function, is the latest in a long series of studies of the precuneus published by Bruner over the last ten years.


Explore further

The temporal lobes of Homo erectus were proportionally smaller than in H. sapiens

More information: Emiliano Bruner et al. A metric survey on the sagittal and coronal morphology of the precuneus in adult humans, Brain Structure and Function (2020). DOI: 10.1007/s00429-020-02152-0
Journal information: Brain Structure and Function

Provided by CENIEH
Citation: New anatomical study of the human precuneus with geometric models (2020, October 20) retrieved 26 November 2020 from https://medicalxpress.com/news/2020-10-anatomical-human-precuneus-geometric.html
This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only.
1 shares

Feedback to editors

User comments