×
MedSchool: Ace Your OSCEsThe Medical Company
 
 
 
 
 
GET - On the App Store
View
Cranial Nerves
 
 

CN XII: Hypoglossal Nerve

 
 
 
Bookmark

Overview

  • Role

  • Somatic motor - intrinsic and extrinsic tongue muscles.

Hypoglossal Nerve Palsy

  • Abnormalities

  • Tongue atrophy
  • Fasciculations (nuclear lesion)
  • Diversion of tongue toward lesion
  • Inability to point tongue away from the side of lesion
  • Causes of Hypoglossal Nerve Palsy

  • Tumour
  • Trauma
  • Infarction
  • Haemorrhage
  • Demyelination
  • Motor neurone disease

Motor Pathway

Cortical Centre
Primary motor cortex (precentral gyrus)
 
 
Hypoglossal Nucleus
Medulla
 
Foramen
Hypoglossal canal
 
 
Muscles
Intrinsic & extrinsic tongue muscles
Next Page
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Want more info like this?
  • Your electronic clinical medicine handbook
  • Guides to help pass your exams
  • Tools every medical student needs
  • Quick diagrams to have the answers, fast
  • Quizzes to test your knowledge
Sign Up Now
   
 
 

Snapshot: Initialising...