CN V test (trigeminal)corneal reflex
face sensation
clench teeth; push down on chin to separate jawCN VI efferent (Abducens)Voluntary motor: lateral rectus muscle of eyeballCN VI test (abducens)lateral gazeCN VII afferent (facial)Taste: anterior tongueCN VII efferent (facial)Voluntary motor: facial muscles
Autonomic: lacrimal, submandibular, and sublingual glandsCN VII test (facial)close eyes tight
smile and show teeth
whistle and puff cheeks
identify familiar tastes (sweet, sour)CN VIII afferent (vestibulocochlear)Hearing: ear
Balance: earCN VIII test (vestibulocochlear)Hear watch ticking
Hearing tests
Balance and coordination testsCN IX afferent (glossopharyngeal)Touch, pain: posterior tongue, pharynx
Taste: posterior tongueCN IX efferent (glossopharyngeal)Voluntary motor: select muscles of pharynx
Autonomic parotid glandCN IX test (glossopharyngeal)Gag reflex, ability to swallowCN X afferent (vagus)Touch, pain: pharynx, larynx, bronchi
Taste: tongue, epiglottisCN X efferent (vagus)Voluntary motor: muscles of palate, pharynx, and larynx
Autonomic: thoracic and abdominal visceraCN X test (vagus)Gag reflex
ability to swallow
say "ahhh"CN XI efferent (accessory)Voluntary motor: SCM and trapezius musclesCN XI test (accessory)resisted shoulder shrugCN XII efferent (hypoglossal)Voluntary motor: muscles of tongueCN XII test (hypoglossal)Tongue protrusion (if injured, tongue deviates toward injured side)