<unk> s (CDs), also known as neurocognitive disorders (NCDs), are a category of mental health disorders that primarily affect<unk>  abilities including learning, memory, perception, and problem solving. Neurocognitive disorders include delirium, mild neurocognitive disorders, and major neurocognitive disorder (previously known as dementia). They are defined by deficits in<unk>  ability that are acquired (as opposed to developmental), typically represent decline, and may have an underlying brain pathology. The DSM-5 defines six key domains of<unk>  function: executive function, learning and memory, perceptual-motor function, language, complex attention, and social cognition. Although Alzheimer's disease accounts for the majority of cases of neurocognitive disorders, there are various medical conditions that affect mental functions such as memory, thinking, and the ability to reason, including frontotemporal degeneration, Huntington’s disease, dementia with Lewy bodies, traumatic brain injury (TBI), Parkinson’s disease, prion disease, and dementia/neurocognitive issues due to HIV infection. Neurocognitive disorders are diagnosed as mild and major based on the severity of their symptoms. While anxiety disorders, mood disorders, and psychotic disorders can also have an effect on<unk>  and memory functions, they are not classified under neurocognitive disorders because loss of<unk>  function is not the primary (causal) symptom. Additionally, developmental disorders such as autism typically have a genetic basis and become apparent at birth or early in life as opposed to the acquired nature of neurocognitive disorders. Causes vary between the different types of disorders but most include damage to the memory portions of the brain. Treatments depend on how the disorder is caused. Medication and therapies are the most common treatments; however, for some types of disorders such as certain types of amnesia, treatments can suppress the symptoms but there is currently no cure.
Cognitive disorder
Sickness behavior
Cognitive deficit
Memory disorder
Mild cognitive impairment
Sleep disorder
Sexual dysfunction
Visual impairment