Neurocognitive Disorders

Neurocognitive disorders (NCDs), formerly known as dementia, encompass a range of conditions characterized by cognitive decline significant enough to interfere with daily functioning. Alzheimer's disease, vascular dementia, Lewy body dementia, and frontotemporal dementia are common types of NCDs, each with unique pathological features and clinical presentations. These disorders are primarily caused by neurodegenerative processes, cerebrovascular disease, or other brain pathologies. The symptoms of NCDs include memory impairment, executive dysfunction, language difficulties, visuospatial deficits, and changes in mood or behavior. The underlying neurobiology involves the progressive loss of neurons, synaptic dysfunction, abnormal protein aggregation (e.g., amyloid-beta plaques, tau tangles), and neuroinflammation. Genetic factors, environmental influences, and lifestyle factors also contribute to the development and progression of NCDs. Early diagnosis and intervention are crucial for managing NCDs, although treatment options remain limited. Therapeutic approaches focus on symptom management, cognitive stimulation, pharmacotherapy targeting neurotransmitter systems, and addressing modifiable risk factors such as hypertension, diabetes, and physical inactivity. Additionally, supportive care and caregiver education are essential components of managing NCDs to improve patients' quality of life.