Jump to ContentJump to Main Navigation
Laboratory Reference for Clinical Neurophysiology$
Users without a subscription are not able to see the full content.

Jay A. Liveson and Dong M. Ma

Print publication date: 1999

Print ISBN-13: 9780195129243

Published to Oxford Scholarship Online: March 2012

DOI: 10.1093/acprof:oso/9780195129243.001.0001

Show Summary Details
Page of

PRINTED FROM OXFORD SCHOLARSHIP ONLINE (www.oxfordscholarship.com). (c) Copyright Oxford University Press, 2018. All Rights Reserved. Under the terms of the licence agreement, an individual user may print out a PDF of a single chapter of a monograph in OSO for personal use (for details see www.oxfordscholarship.com/page/privacy-policy).date: 18 October 2018

Thoracic Dermatomes

Thoracic Dermatomes

(p.163) Chapter 5 Thoracic Dermatomes
Laboratory Reference for Clinical Neurophysiology

Jay A. Liveson

Dong M. Ma

Oxford University Press

The twelve pairs of intercostal nerves consist of the anterior rami supplying the sensation of the trunk. The nerves can be divided into those running a thoracic course (T2 through T6), and those with a thoracoabdominal course. The former provide the motor supply to the intercostal muscles. The latter innervate the abdominal muscles, ending on the rectus abdominis. These nerves can be entrapped along their course. They also may be involved in respiratory abnormalities. For stimulation, surface electrodes, comma-shaped, at proximal sites (just lateral to the paraspinal muscles) and distal sites (six centimeters behind the costal margin) in the same costal interspace. Patients lie on the opposite side with arm rested overhead. It is unnecessary to hold one's breath. Supramaximal stimulation requires a higher voltage at the proximal site. Onset latencies and negative peak amplitudes are measured. Contralateral comparisons could be made of latencies and velocities, but not amplitudes.

Keywords:   intercostal nerves, rami, latencies, velocities, thoracic course, thoracoabdominal course, supramaximal stimulation, rectus abdominis

Oxford Scholarship Online requires a subscription or purchase to access the full text of books within the service. Public users can however freely search the site and view the abstracts and keywords for each book and chapter.

Please, subscribe or login to access full text content.

If you think you should have access to this title, please contact your librarian.

To troubleshoot, please check our FAQs , and if you can't find the answer there, please contact us .