Dementia ( Internal Medicine ) by Dr Nishant Arya

📌 𝐅𝐨𝐥𝐥𝐨𝐰 𝐨𝐧 𝐈𝐧𝐬𝐭𝐚𝐠𝐫𝐚𝐦:-   / drgbhanuprakash   📌𝗝𝗼𝗶𝗻 𝗢𝘂𝗿 𝗧𝗲𝗹𝗲𝗴𝗿𝗮𝗺 𝗖𝗵𝗮𝗻𝗻𝗲𝗹 𝗛𝗲𝗿𝗲:- https://t.me/bhanuprakashdr 📌𝗦𝘂𝗯𝘀𝗰𝗿𝗶𝗯𝗲 𝗧𝗼 𝗠𝘆 𝗠𝗮𝗶𝗹𝗶𝗻𝗴 𝗟𝗶𝘀𝘁:- https://linktr.ee/DrGBhanuprakash Dementia ( Internal medicine ) - ---------------------------------------------------- Definition: Dementia is a clinical syndrome characterized by a progressive decline in cognitive function, which interferes with daily living activities and social functioning. It is not a specific disease but a group of symptoms affecting memory, thinking, problem-solving, and language. Epidemiology : Prevalence: Dementia is a major cause of disability among the elderly population, with prevalence increasing significantly with age. It affects about 5-8% of individuals aged 65 and above, with the prevalence doubling every 5 years after age 65. Gender Distribution: Women are more likely to develop dementia than men, possibly due to longer life expectancy. Etiology : Alzheimer’s Disease: The most common cause, accounting for 60-80% of cases. It is characterized by the accumulation of amyloid plaques and neurofibrillary tangles in the brain. Vascular Dementia: The second most common cause, resulting from cerebrovascular disease and ischemic brain injuries. Lewy Body Dementia: Characterized by the presence of Lewy bodies, abnormal aggregates of protein within neurons. Frontotemporal Dementia: Involves atrophy of the frontal and temporal lobes, leading to significant changes in personality and behavior. Mixed Dementia: Involves a combination of Alzheimer’s disease and vascular dementia. Other Causes: Parkinson’s Disease: Dementia can occur in the later stages of Parkinson’s. Huntington’s Disease: A genetic disorder that leads to progressive dementia. Traumatic Brain Injury: Repeated injuries can lead to dementia pugilistica. Infections: Such as HIV, syphilis, and Creutzfeldt-Jakob disease. Pathophysiology - Alzheimer’s Disease: Amyloid Plaques: Extracellular deposits of beta-amyloid protein. Neurofibrillary Tangles: Intracellular aggregates of hyperphosphorylated tau protein. Neuronal Loss: Widespread neuron death leads to brain atrophy. Vascular Dementia: Ischemia: Reduced blood flow due to strokes or chronic atherosclerosis. Lacunar Infarcts: Small, deep brain infarcts leading to cognitive decline. Lewy Body Dementia: Lewy Bodies: Abnormal protein deposits in neurons affecting dopamine production. Frontotemporal Dementia: Tau and TDP-43 Proteins: Abnormal accumulation in the brain's frontal and temporal regions. Clinical Features - Cognitive Symptoms: Memory Loss: Difficulty remembering recent events or information. Language Problems: Difficulty finding the right words or understanding language. Executive Dysfunction: Impairment in planning, organizing, and abstract thinking. Visuospatial Dysfunction: Difficulty recognizing faces, understanding spatial relationships. Behavioral Symptoms: Personality Changes: Apathy, irritability, and social withdrawal. Mood Disorders: Depression, anxiety, and emotional lability. Psychosis: Hallucinations, delusions, particularly in Lewy Body Dementia. Motor Symptoms: Parkinsonism: Rigidity, bradykinesia, and tremors (common in Lewy Body Dementia). Gait Abnormalities: Seen in Vascular Dementia and advanced Alzheimer’s. Diagnosis - Clinical Evaluation: History: Detailed history of cognitive decline and its impact on daily living. Neurological Examination: To assess cognitive function, motor skills, and sensory function. Cognitive Testing: Mini-Mental State Examination (MMSE): Commonly used screening tool. Montreal Cognitive Assessment (MoCA): More sensitive, especially for mild cognitive impairment. Imaging: MRI/CT Scan: To rule out structural causes like tumors, strokes, and hydrocephalus. PET Scan: Can detect amyloid plaques and reduced glucose metabolism in Alzheimer’s. Management - Pharmacological Treatment: Cholinesterase Inhibitors: Donepezil, rivastigmine, and galantamine are used to treat mild to moderate Alzheimer’s disease. NMDA Receptor Antagonist: Memantine is used for moderate to severe Alzheimer’s. Antidepressants: SSRIs for treating depression associated with dementia. Antipsychotics: Limited use due to increased risk of stroke and mortality, primarily for severe agitation and psychosis. #Dementia #AlzheimersDisease #CognitiveDecline #Neurology #VascularDementia #LewyBodyDementia #FrontotemporalDementia #MemoryLoss #BrainHealth #MentalHealth #Geriatrics #CognitiveFunction #DementiaCare #Neurodegenerative #InternalMedicine #MedicalEducation #MedicalStudents #NEETPG #USMLE #FMGE #MedSchool #MedStudentLife #ClinicalMedicine #HealthcareEducation #PatientCare #MedNotes #MedicalRevision