Radiological Anatomy: Anterior Horizontal Ramus Of The Sylvian Fissure

OVERVIEW

This page is dedicated to covering how the anterior horizontal rams of the Sylvian fissure will appear across different radiological studies. It is an important anatomical structure in the brain.

The anterior horizontal rami (AHR) is an important anatomical structure in the brain (image source).
APPEARANCE OF THE HORIZONTAL ANTERIOR RAMUS OF THE SYLVIAN FISSURE ON SAGITTAL CROSS SECTIONS

The horizontal anterior ramus of the Sylvian fissure can be fond on sagittal sections by first identifying the Sylvian fissure. This ramus will originate from the anterior aspect of the Sylvian fissure and extends horizontally (as demonstrated in the image below).

The images above are from a T1 weighted MRI of the head without contrast. One image is shown in the axial plane (top left) and two identical images are shown in the sagittal plane (middle, right). Both sagittal images are identical, except the right sided image has been annotated to show the location of the Sylvian fissure (red line) and the horizontal anterior ramus of the Sylvian fissure (blue line).

HERE ARE SOME EXAMPLES OF THIS RAMUS SEEN ON A NON-CONTRAST HEAD CT-SCAN (SAGITTAL ORIENTATION). CLICK THE THUMBNAILS TO VIEW THEM.

HERE ARE SOME EXAMPLES OF THIS RAMUS SEEN ON A T1 WEIGHTED HEAD MRI WITHOUT CONTRAST (SAGITTAL ORIENTATION). CLICK THE THUMBNAILS TO VIEW THEM.

ACKNOWLEDGEMENTS

A very special thanks goes to Dr. Pierre Sasson who made this page possible with his expertise and insight.

 

Page Updated: 12.24.2017