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5 Cards in this Set

  • Front
  • Back

CN XII




- Name


- Type


- Origin

- Hypoglossal




- Motor




- Origin: Medulla

CN XII




- Innervation

- Intrinsic muscles of the tongue




- Extrinsic muscles of the tongue


~ Genioglossus (contralateral innervation only)


~ Hyoglossus (bilateral)


~ Styloglossus (bilateral)

CN XII




- Function

- articulation




- Oral stage of swallow




- Pharyngeal stage of swallow


~ geniohyoid elevates larynx

CN XII




- Damage

At rest


- Atrophy


- Fasciculations


- Tremor / random movements




Protrusion


- Deviation toward weak side




Movement


- Slow / discoordinated

CN XII




- Damage (UMN vs LMN)

- Unilateral


~ UMN = contralateral weakness


~ LMN = ipsilateral weakness




- Bilateral


~ UMN = bilateral weakness, redux/slow movements


~ LMN = bilateral weakness