# Comparative Analysis of Sectional Anatomy, Computed Tomography and Magnetic Resonance of the Cadaveric Six-Banded Armadillo (Euphractus sexcintus) Head

## TL;DR

This study uses imaging techniques to describe the head anatomy of the six-banded armadillo, providing a reference for diagnosing disorders in this species.

## Contribution

The study provides a novel comparative anatomical analysis of the six-banded armadillo's head using modern imaging techniques.

## Key findings

- A well-developed tympanic cavity was observed in the six-banded armadillo's head.
- Masticatory muscles such as the temporalis and masseter were clearly delineated.
- The encephalon showed mammalian-like features, including well-developed olfactory bulbs.

## Abstract

The six-banded armadillo (Euphractus sexcintus), like many other wildlife species, is classified as least concern by the International Union for Conservation of Nature (IUCN), primarily due to its broad distribution and large population size. However, in recent years, its population has declined in certain areas due to human activities. The limited literature available on the anatomy of this species prompted us to investigate the head of the six-banded armadillo by using modern imaging techniques, such as computed tomography and magnetic resonance imaging, combined with anatomical cross-section, to acquire valuable information about the structures comprising its head.

In this research, we examined the head of the six-banded armadillo (Euphractus sexcintus) using advanced imaging techniques, including computed tomography and magnetic resonance imaging, and correlated these findings with the anatomical cross sections. For this, we analyzed three adult specimens. By integrating imaging data with anatomical cross-sections, we present a detailed description of the structures that constitute the head of this species, highlighting its most distinctive features. Therefore, a well-developed tympanic cavity was observed. The masticatory muscles, including the temporalis, masseter, medial, and lateral pterygoid muscles, were adequately delineated. Moreover, the encephalon exhibited characteristics like those of other mammals, with notable development of the olfactory bulbs. This anatomical information may serve as a valuable diagnostic reference for the clinical evaluation of different disorders in the six-banded armadillo, such as cranial malformations, fractures, neurological conditions, and neoplasms.