Behavioural disorder: insidious onset and slow progression; early loss of personal and social awareness; early signs of disinhibition; mental rigidity and inflexibility; and hyperorality
, stereotyped and perseverative behaviour.
Associated features are usually fears and anxiety, absence of facial expression, inability to attribute emotions to others, hyperorality
or inability to adequately modulate sensory input (see Bachevalier, 1994 and 1997 for a review).
Clinical guidelines for FTD developed in 1994 include descriptions of behavior deterioration in areas of social awareness and hygiene, disinhibition, rigidity, hyperorality, stereotypy, impulsivity, and distractibility.
Patients with FTD may also demonstrate hyperorality, often in the form of placing inedible objects in their mouths and eating voraciously.
These changes may include sexually inappropriate behavior, poor hygiene, hyperorality
, disinhibition, and perseverative behavior (Neary, Snowden, & Mann, 2000).
Disinhibition, apathy, social withdrawal, hyperorality
, and ritualistic compulsive behaviors are the telltale symptoms, said Dr.