13. Calculations

Right–left confusion. Can the patient identify right and left body parts?

Finger agnosia. Can the patient name and identify each digit?

Agraphia. Can the patient write their name and a sentence?

These functions are often tested as part of language (see previous page, Language). Right–left confusion and finger agnosia can both be quickly screened for with the classic command, "Touch your right ear with your left thumb."