It’s a Boy!. Where does the dissociation between structures involved in LTM come from (in humans)?...
36
It’s a Boy!
-
date post
19-Dec-2015 -
Category
Documents
-
view
214 -
download
0
Transcript of It’s a Boy!. Where does the dissociation between structures involved in LTM come from (in humans)?...
It’s a Boy!
Where does the dissociation between structures involved in LTM come from (in humans)?
Long-term Memory
Long-term Memory
Patient H.M.
• “Loss of Recent Memory After Bilateral Hippocampal Lesions”, Scoville and Milner (1957)
• onset of epilepsy at age ten, perhaps due to bike
accident (wear a helmet!)
• 1953 - underwent temporal lobectomy to reduce seizure activity
• severe anterograde amnesia• temporally graded retrograde amnesia
Patient H.M.
Patient H.M.
1. Memory and perceptual skills are dissociable.2. Lesions of the MTL produce amnesia for recent but not
remote events.3. There are multiple long-term memory systems in the brain.
Patient H.M.
Long-term Memory
• What’s the one thing that all of these people have in common?
Lesions!
Long-term Memory
• What about normal memory?
• That is, memory in the “normal” brain
Long-term Memory
The theory is that the MTL is temporally involved in declarative memory in normal humans…
Long-term Memory
Long-term Memory
Long-term Memory
• functional imaging data from “normal” subjects confirms lesion studies
• be skeptical!
Long-term Memory
• What would it be like to possess the ability to remember everything?
Long-term Memory
• Case study of S. (Solomon Shereshevskii)
• Russian journalist
• never took any notes, recalled everything verbatim
• thought this was “normal”
Long-term Memory
• Alexander Luria - Soviet neuropsychologist
Long-term Memory
• Shereshevskii suffered from synaesthesia• stimulation of one sense leads to automatic stimulation
of another • hearing a sound produces a visual experience
“I can see the music…”
Long-term Memory
• random number table
Long-term Memory
1 this is a proud, well-built man 2 is a high-spirited woman 3 is a gloomy person6 is a man with a swollen foot7 is a man with a moustache 8 is a very stout woman - a sack within a sack.
“As for the number 87, what I see is a fat woman and a man twirling his moustache”
Long-term Memory
• memory consists of associative networks• perhaps mnemonists can create better networks
To Kill A Mockingbird
Long-term Memory
• memory consists of associative networks• perhaps mnemonists can create better networks
To Kill A Mockingbird
highschoolMr. Lacey
English
Long-term Memory
• memory consists of associative networks• perhaps mnemonists can create better networks
birdcanary
chicken
mockingbird
To Kill A Mockingbird
racism
highschool
Martin Luther King
skiing
Mr. Lacey
English
• What do you think the brain of someone that has this “super memory” would look like?
Long-term Memory
• What if I told you it looked like this?
Long-term Memory
Kim Peek
Long-term Memory• macroencephaly• no corpus callosum• no anterior/posterior commisure
• degenerated cerebellum
• Autism?• Motor disturbances• Overall I.Q. of 87
• despite this, he displays some amazing abilities…
Long-term Memory
Long-term Memory
Long-term Memory
http://www.youtube.com/watch?v=k2T45r5G3kA
Long-term Memory
• 98% retention rate for reading material• reads on average 8 books a day (has approximately 9000
memorized!)• one page every 8-10 seconds• also has incredible memory for music, often remembering
compositions only experienced once
Long-term MemoryWhat could support this ability?
“Does brain damage stimulate compensatorydevelopment in some other area of the brain, or does it
simply allow otherwise latent abilities to emerge?”
Long-term Memory
