10 Cranial Nerves

Structures

Olfactory

Optic

• more an outgrowth of brain

• ipsilateral lesion symptoms

Oculomotor

Trochlear

• read or go down stairs

• tilt head to opposite side to compensate. Other eye works normal

Trigeminal

• bilateral blink

Abducens

Facial

• UMN from both sides to forehead but only one side to lower face

• pt with UMN lesion affecting facial nerve maintain forehead movement

• LMN lesion completely losses both sides

• unable to tolerate sounds because so loud

• facial droop in half of face

Vestibularcochlear

• rarely done

• Doll's eyes: eyes move with head turn

• almost never done

• warm water side push eye ball away

Glossopharyngeal

Vagus

Speech Test

• aortic dissection: enlarged aorta

Accessory

Hypoglossal

• CN 12 pushes tongue to midline

Reflexes

Tongue