do these patients get confused when they wake up?
Yes
Parasomnia
Confusional arousal is a condition when an individual awakens from sleep and remains in a confused state. 
how did lewy body dementia get its name Kenji Kosaka what is this dementia? A type of dementia accompanied by changes in sleep, behavior, cognition, movement, and autonomic bodily functions how is it classified? It is one of the two Lewy body dementias, along with Parkinson's disease dementia how is it diagonosed? Diagnosis of the living is referred to as "probable" or "possible" because of the wide range of symptoms with differing levels of severity in each individual how does this disease affect the society? UNANSWERABLE what medicines are prescribed for treating this? Pharmacological management of DLB is complex because of adverse effects to medications does it affect sleep? Yes, have REM sleep behavior disorder (RBD) is it related to movements during sleep as well? Yes what are such diseases called? Parasomnia how is it diagnosed? It is most commonly diagnosed by means of questionnaires how is it treated? In adults psychoeducation about a proper sleep hygiene can reduce the risk to develop parasomnia
wiki:2422404
Parasomnia [SEP] Confusional arousals
Confusional arousal is a condition when an individual awakens from sleep and remains in a confused state. It is characterized by the individual's partial awakening and sitting up to look around. They usually remain in bed and then return to sleep. These episodes last anywhere from seconds to minutes and may not be reactive to stimuli. Confusional arousal is more common in children than in adults. It has a lifetime prevalence of 18.5% in children and a lifetime prevalence of 2.9-4.2% in adults. Infants and toddlers usually experience confusional arousals beginning with large amounts of movement and moaning, which can later progress to occasional thrashings or inconsolable crying.