The brain's ability to process, retain, and use information
Cognitiveabilities
Reasoning, judgment, perception, attention, comprehension, and memory
Dementia
Previously categorized adult cognitive disorders, now called neurocognitive disorders (NCDs) in DSM-5
Delirium
A syndrome that involves a disturbance of consciousness accompanied by a change in cognition
Delirium usually develops over a shortperiod, sometimes a matter of hours, and fluctuates, or changes, throughout the course of the day
Clients with delirium
Have difficulty paying attention, are easily distracted and disoriented, and may have sensory disturbances such as illusions, misinterpretations, or hallucinations
Groups most frequently diagnosed with delirium
Elderly patients
10% to 15% of general surgical patients
30% of open heart surgery patients
More than 50% of patients treated for fractured hips
80% of terminally ill patients
Most common causes of delirium
Physiological or metabolic
Infection
Drugrelated
Primary treatment for delirium
Identify and treat any causal or contributingmedicalconditions
Dementia
A disease process marked by progressive cognitive impairment with no change in the level of consciousness
Cognitive disturbances seen in dementia
Aphasia (deterioration of language function)
Apraxia (impaired ability to execute motor functions despite intact motor abilities)
Agnosia (inability to recognize or name objects despite intact sensory abilities)
Disturbance inexecutivefunctioning (ability to think abstractly and to plan, initiate, sequence, monitor, and stop complex behavior)
Stages of dementia
Mild: Forgetfulness
Moderate: Confusion and progressive memory loss
Severe: Personality and emotional changes, delusional, wandering, require assistance with ADLs
Alzheimer'sdisease
A progressive brain disorder with gradual onset, causing increasing decline in functioning including loss of speech, loss of motor function, and profound personality and behavioral changes
Lewybodydementia
Involves progressive cognitive impairment and extensive neuropsychiatric symptoms as well as motor symptoms, with common delusions and visual hallucinations
Vasculardementia
Symptoms similar to Alzheimer's but with abrupt onset, rapid changes in functioning, plateaus, and more abrupt changes
Frontotemporallobardegeneration
A degenerative brain disease that particularly affects the frontal and temporal lobes, resulting in a clinical picture similar to Alzheimer's
Priondiseases
Caused by a prion (protein) that can trigger normal proteins in the brain to fold abnormally, such as Creutzfeldt-Jakob disease
HIVinfection
Can lead to dementia and other neurologic problems, either directly from invasion of nervous tissue or from other AIDS-related illnesses
Parkinson's disease
A slowly progressive neurologic condition characterized by tremor, rigidity, bradykinesia, and postural instability
Huntington'sdisease
An inherited, dominant gene disease involving cerebral atrophy, demyelination, and enlargement of brain ventricles, with choreiform movements
Traumaticbraininjury
Can cause dementia as a direct pathophysiological consequence, with degree and type of impairment depending on location and extent of injury
Korsakoffsyndrome/dementia
Dementia resulting from long-term alcohol use, with amnesia and confabulation as common symptoms
Nursing assessment of clients with dementia
Frequentbreaks, simplequestions, allowingtimetoanswer, mentalstatusexam to assess cognitive abilities
Clients display aphasia, apraxia, and loss of ability to solve problems or take action in new situations
Dementia profoundly affects client's roles, relationships, and ability to live independently
Clients with dementia often experience disturbedsleep-wakecycles, incontinence, and difficultywithself-care