Electroencephalography in young onset dementia

BMC Neurology

Table 5 The number of patients with young onset Alzheimer’s disease or young onset frontotemporal dementia with specific presenting problems who had EEG abnormalities

EEG abnormality	Memory disturbance^a	Behavioural changes^b	Mood disturbance^c	Language deficits^d	Motor disturbance^e
Young onset Alzheimer’s disease
Total (n = 103)	103	14	26	14	4
Epileptiform activity only (n = 2)	2	0	1	0	0
Slow wave changes only (n = 51)	51	10	13	9	2
Both (n = 38)	38	4	9	5	2
Neither (n = 12)	12	0	3	0	0
Young onset frontotemporal dementia
Total (n = 28)	19	18	7	6	1
Epileptiform activity only (n = 3)	3	3	0	0	0
Slow wave changes only (n = 7)	2	4	3	2	1
Both (n = 5)	5	1	2	1	0
Neither (n = 13)	9	10	2	3	0

^a Memory disturbance is defined as a change in any type of memory, such as short-term memory and long-term memory
^b Behavioural changes are defined as any change in behaviour such as an increase in aggression, inappropriate behaviours, or obsessionality
^c Mood disturbance is defined as a significant change in baseline mood that is not otherwise explained
^d Language deficits are defined as a decrease in language fluency, either with language production or language comprehension. Note that word finding difficulties are considered a memory disturbance
^e Motor disturbance is defined as a disturbance in motor functioning such as dystonia, apraxia, and paraparesis

ISSN: 1471-2377