lesson 3 memory decline and the healthy aging brain 2015
TRANSCRIPT
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Lesson 3 Memory
Decline and the Healthy Ageing
Brain
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From last Lesson........
Research suggests that the hippocampus is critical to the formation and consolidation of memories, playing part in deciding if information received a by the senses is worth remembering, then organising memories before directing them to other sections of the brain.
What role does the hippocampus play in memory?
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Neurodegenerative disease – decline in structure and function of neurons E.g. Alzheimer's disease
Amnesia – Loss of memory, partial or complete, temporary or permanent. Can be caused by either of:
Brain trauma – damage inflicted through injury interferes with functioningE.g. Brain injury, stroke, drug abuse etc
Amnesia
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Anterograge AmnesiaCan’t make new Long Term memories ofevents that occur after the injury – hippocampus damage commonCannot transfer information from STM to LTM
Retrograde AmnesiaCant remember old informationEvents before the injury lostUsually temporary and caused by a blow to the headMemory of events immediately preceding the injury are permanently lost (interruption or consolidation)
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Anterograge Amnesia
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Retrograde Amnesia
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Older people Do take longer to learn new information
STM – Depends on the task, easy one part tasks are ok. Tasks that require divided attention are challenging for older people.
LTM - Episodic down, Procedural same, Semantic Same
Memory decline over the lifespan
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Not necessarily inevitablenormal. Amount of decline depends on:
• How retention is measured - same
• Motivation to remember • Self confidence• Nervous system condition
Memory decline over the lifespan