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)
Primary motor cortex (precentral gyrus)
Hypoglossal Nucleus
Medulla
Medulla
Foramen
Hypoglossal canal
Hypoglossal canal
Muscles
Intrinsic & extrinsic tongue muscles
Intrinsic & extrinsic tongue muscles
Next Page
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------
