Language

• Dementia includes a loss of language skills, according to the U.S. National Library of Medicine. Patients may have difficulty coming up with the name of a familiar place or object.
  
  

Memory

• Dementia sufferers have serious memory deficiencies and may forget details of recent events and the significant happenings in his own life. These patients may misplace commonly used items and get lost in surroundings that used to be familiar to them.
  
  

Perception

• People with dementia may have problems with reading and writing, they may have delusions and not be able to perceive danger.
  
  

Emotional Behavior

• Individuals with dementia may lose their social skills and experience personality changes. These patients may stop engaging in social contact with friends and family members.
  
  

Cognitive Skills

• Dementia patients may have difficulties with abstract thinking, calculations and judgment.