communicate the actual perception of brain. Relationship of emotion to the daily behaviors: Emotions are the part of life and they may be negative and positive both of these affects the normal behavior of an individual. It is seen that negative emotions like anger, jealousy affect our attitude badly. Whereas positive emotions build our character and in some in cases it is also negative as in emotions we allow the loved ones to hurt us physically and emotionally emotions becomes distorted when we get deeply intense in a particular emotion. In Alzheimer’s disease patient experience emotions but is unable to regulate them. This leads to abrupt or irrational behavior. It is often seen that person having Alzheimer’s disease sometime get upset for no significant reason. They usually forget the events that caused strong emotional feelings. But they remember the feelings linked with any incident. We have seen that patients with Alzheimer’s disease often reported sustained feeling of happiness and sadness that trigger their emotional abrupt behavior. Findings of recent studies are similar to that of previous studies that patients of Alzheimer’s disease have somewhat preserved emotion (Blessign et al, 2006; Evans-Roberts and Turnbull, 2011). Another study goes beyond and described that patient of Alzheimer’s disease are more influenced by the events that they cannot remind. You can say that the strong emotional feelings remain even after the memories are vanished in Alzheimer’s patients. These patients exhibit an interesting phenomena of “feelings without memory” and this is similar to the patient having hippocampal amnesia
(Feinstein et al, 2010). These patients also show a similar phenomenon of having prolonged state of sadness after watching a sad film. These contrasting findings from different studies suggest that in Alzheimer’s patient there is a free-flowing state of negative emotion, that are not related with the emotion-inducing memory. In free-floating state of emotion, patient is triggered by negative emotion and start discovering the source of that emotional disturbance leading to abnormal behavior (Feinstein, 2012). In Alzheimer’s patients, amnesia makes them vulnerable to these emotional disturbance and prevent them from making any conclusive decision. In Alzheimer’s disease patient having source amnesia can recall the information but are unable to tell from where, how and under what conditions they obtained that information (Dalla Barba et al, 1999). In the early stages of Alzheimer’s disease it is seen that neural systems underlying emotional processing and sustained feelings can be preserved for a long period of time. Previous studies have found that amygdala is highly associated with the formation of emotional memory (Adolphs et al, 1997; Cahill et al, 1995). In Alzheimer’s patients it is seen that facial responses are also preserved and that is related with the emotional reactivity (Mograbi et al, 2012).