Upload
mura
View
42
Download
0
Tags:
Embed Size (px)
DESCRIPTION
Memory Impairments. Amnesia. Loss of memory ability - usually due to lesion (damage) or surgical removal of various parts of the brain. Amnesia. Loss of memory ability - usually due to lesion or surgical removal of various parts of the brain Two broad categories: - PowerPoint PPT Presentation
Citation preview
Memory Impairments
Amnesia
• Loss of memory ability - usually due to lesion (damage) or surgical removal of various parts of the brain.
Amnesia
• Loss of memory ability - usually due to lesion or surgical removal of various parts of the brain
• Two broad categories:– Retrograde: loss of memories for events
prior to damage
Amnesia
• Loss of memory ability - usually due to lesion or surgical removal of various parts of the brain
• Two broad categories:– Retrograde: loss of memories for events
prior to damage– Anterograde: loss of ability to store new
memories of events after damage
RetrogradeAmnesia
AnterogradeAmnesia
Amnesia
Amnesia
• Typically impacts LTM, not short-term or sensory memory!
Causes of Amnesia• Concussion• Migraines• Hypoglycemia• Epilepsy• Electroconvulsive shock therapy• Specific brain lesions (i.e. surgical removal) • Ischemic events• Drugs (esp. anesthetics)• Infection• Psychological• Nutritional deficiency• Sleep/Circadian effects• Aging
Causes of Amnesia• Concussion• Migraines• Hypoglycemia• Epilepsy• Electroconvulsive shock therapy• Specific brain lesions (i.e. surgical removal) • Ischemic events• Drugs (esp. anesthetics)• Infection• Psychological• Nutritional deficiency• Sleep/Circadian effects• Aging
Causes of Amnesia• Concussion• Migraines• Hypoglycemia• Epilepsy• Electroconvulsive shock therapy• Specific brain lesions (i.e. surgical removal) • Ischemic events• Drugs (esp. anesthetics)• Infection• Psychological• Nutritional deficiency• Sleep/Circadian effects• Aging
But not HM!
Causes of Amnesia• Concussion• Migraines• Hypoglycemia• Epilepsy• Electroconvulsive shock therapy• Specific brain lesions (i.e. surgical removal) • Ischemic events• Drugs (esp. anesthetics)• Infection• Psychological• Nutritional deficiency• Sleep/Circadian effects• Aging
Nutritional Deficiency
• Anorexia– Cognitive impairments– Mood disorder– Abnormal cort response
Korsakoff’s Syndrome
• Lesions to Medial Thalamus– Results from chronic alcoholism and
consequent thiamine deficiency
Korsakoff’s SyndromeThe Lost Mariner
What happened to Jimmie? What was his life like?
Korsakoff’s Syndrome (The Lost Mariner)
• Lesions to Medial Thalamus– Results from chronic alcoholism and
consequent thiamine deficiency– Severe anterograde amnesia
Korsakoff’s Syndrome (The Lost Mariner)
• Lesions to Medial Thalamus– Results from chronic alcoholism and
consequent thiamine deficiency– Severe anterograde amnesia– Severe retrograde amnesia extending
years before damage
Korsakoff’s Syndrome (The Lost Mariner)
• Lesions to Medial Thalamus– Results from chronic alcoholism and
consequent thiamine deficiency– Severe anterograde amnesia– Severe retrograde amnesia extending
years before damage– Confabulation - make up stories to explain
absence of memory
Korsakoff’s Syndrome (The Lost Mariner)
• Lesions to Medial Thalamus– Results from chronic alcoholism and
consequent thiamine deficiency– Severe anterograde amnesia– Severe retrograde amnesia extending
years before damage– Confabulation - make up stories to explain
absence of memory– Often unaware of their deficit
Korsakoff’s Summary
• Chronic alcohol consumption can damage memory. In what regard?– Graded retrograde amnesia– Profound anterograde amnesia
Brain Damage• Patient R.B.
Ischemic damage– Specific memory
impairments (e.g., Rey-Osterrieth figure drawing task
Brain Damage• Patient R.B. Ischemic damage.
Brain Damage• Patient N.A. Mechanical injury
– Profound impairments on verbal memory tests• Word list recall
Brain Damage Summary
• Impairments can be limited to specific memory.
• Take care of your cardiovascular system.
• Don’t get stabbed in the brain.
Everyone experiences memory loss with agingCognitive Aging
Problematic Cognitive Aging
• Mild Cognitive Impairment
• Dementia– Alzheimer’s Disease
Mild Cognitive Impairment
• There are different subtypes– Single Cognitive domain– Multiple cognitive domains– Amnestic– Nonamnestic
Prospective Memory
– Prospective memory effects• Remembering that you have to do something
– Cued– Time
– Retrospective memory effects• I knew I supposed to do something…
Dementia
• Functional changes• Most common: AD
Alzheimer’s Disease
• Cognitive traits– Language impairments– Visuospatial disturbance– Memory loss ****
– Minimize stress– Proper nutrition (eat your veggies)– Healthy lifestyle (exercise and sleep)– Keep using your brain– Protect your brain from injury– Everything in moderation
Don’t despair, you can protect your memory/brain!