This site is intended for healthcare professionals

Sign in
Go to /sign-in page

You can view 5 more pages before signing in

Motor component

Authoring team

The fifth cranial nerve supplies motor functions to the muscles of mastication. Assessment is the same as for motor function elsewhere:

  • inspect for wasting of the temporal and masseter muscles
  • check for function of masseter and pterygoid muscles:
    • ask the patient to clench his teeth - palpate for contraction of the masseter above the mandible
    • ask the patient to open his mouth - pterygoid muscles - and hold his mouth open as the examiner attempts to force it shut. Caution must be exercised.

If there is a unilateral fifth nerve lesion then there may be deviation of the jaw to the weaker, affected side.

Create an account to add page annotations

Create a free account

Annotations allow you to add information to this page that would be handy to have on hand during a consultation. E.g. a website or number. This information will always show when you visit this page.

The content herein is provided for informational purposes and does not replace the need to apply professional clinical judgement when diagnosing or treating any medical condition. A licensed medical practitioner should be consulted for diagnosis and treatment of any and all medical conditions.

Connect

Copyright 2024 Oxbridge Solutions Limited, a subsidiary of OmniaMed Communications Limited. All rights reserved. Any distribution or duplication of the information contained herein is strictly prohibited. Oxbridge Solutions receives funding from advertising but maintains editorial independence.