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Tongue Deviation



    • How to Elicit

    • Ask the patient to protrude their tongue, and then move it to either side.
    • Interpretation

    • Deviation to the left - suggests a lesion of the left hypoglossal (XII) nerve or higher
    • Deviation to the right - suggests a lesion of the right hypoglossal (XII) nerve or higher
    • Causes of Tongue Deviation

    • Contralateral upper motor neuron lesion - trauma, tumour, ischaemia, demyelination
    • Ipsilateral hypoglossal (XII) nerve palsy - trauma, infarction, haemorrhage, demyelination
    • Motor neurone disease
    • Trauma
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