Table 1.

Progression of Clock-Watching Activity and Semantic Aphasia in a Patient With Semantic Dementia.

Year(s)		Clock-Watching	Semantic Aphasia	Other Measurements or Information
2008-2009	Outpatient	Daily outing to the same park at the same time in the afternoon. Constantly checking the clock on patient’s mobile phone.	Advanced prosopagnosia Two-way anomia for common words	Arrested for shoplifting
2010	Inpatient	Unable to distinguish the hour hand from the minute hand on a clock. Unable to distinguish daytime from nighttime.	Spoke few words, always related to time (8, 1, 4 o’clock)	Independent with basic activities of daily living
2011-study period		Patient left his room about 40 minutes every hour to look for food. Patient kept the ceiling light on at night to watch the wall clock.	Spoke words related to 8 o’clock only	CDR score = 0.5 NPI-NH (disinhibition = 1; apathy = 0; sleep disorder = 4; eating disorder = 4) Median distance moved/day (interquartile) = 1681 m (2464 m)
2012-study period		Disappearance of clock-watching activity	Rarely spoke autonomously.	CDR score = 3 NPI-NH (disinhibition = 8; apathy = 8; sleep disorder = 4; eating disorder = 4) Median distance moved/day (interquartile) = 1106 m (419 m)

Abbreviations: CDR, Clinical Dementia Rating Scale; NPI-NH, Neuropsychiatric Inventory–Nursing Home Version.