Science Journal – How brain stores-retrieve memory & how much space is there
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Our brain is magnificent storing device which holds all memory of many decades we live. Many questions arises from the perception we have about our brain, e.g. • How much space does our brain have? • Is there unlimited space in our brain? • Can our brain hold unlimited memory or information? • How may gb or tb space is there in our brain? But our brain isn’t like computer and our memory isn’t stored like data stored in harddrive. In fact, our brain is so efficient it just stores bits and pieces of info of events. When we recall an event, the brain reconstructs the whole event that is why our memory isn’t very vivid and few details changes every time we recall something. To know, how our brain stores and retrieves memory and how our memory is different from data stored in disc of hard-drive, watch the video in the presentation.
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Science Journal – How brain stores-retrieve memory & how much space is there
- 1. How much memory our brain can store or how many gb of space is there in our brain?
- 2. How data is stored in hard-drive
- 3. Memory saved in brain as circuit of neurons. When electricity flows through a circuit, we remember the memory associated with that circuit
- 4. 100 billion x 1000 links/neuron = 100 trillion = 100 Tb (assuming each link as 1byte) 100 Tb
- 5. Complex neuron circuits in brain As neurons intertwine, number of possible connection exponentially increases, hence few say, we have many petabyte memory (1 Pb= 1m Gb)
- 6. Data stored in hard-drive as magnetic bits
- 7. When we remember an event, brain assemble data from different region to create a memory similar to original event
- 8. In real Distorted memory As our memory is recreated on recall, it may differ from real event means our memory may be wrong
- 9. Sometimes brain uses same data to recreate similar memories, it doesn’t make duplicate circuits for same kind of event, hence it is hard to find difference between similar type of memories
- 10. IBM Blue Gene/Q super computer simulated 530 billion neurons & 100 trillion synapses in 2012, yet it was 1500 time slower in processing speed comparing to brain
- 11. Our brain recreates memory from bits and pieces on-the-fly, same kind of memories are assigned common circuit, no duplication, only important details needed to recreation is saved, not pixel by pixel, bit by bit (as PC saves data),hence memory isn’t vivid and accurate but this mechanism gives us virtually unlimited storing opportunity
- 12. Forgotten long term memory can be retrieved using hypnosis, so they are not destroyed, we just lose retrieval cue because of change in synapses
- 13. TheJournal Any fool can know. The pointis tounderstand AlbertEinstein https://www.youtube.com/user/MrScientific Mind
Editor's Notes
- How much memory our brain can store or how many gb of space is there in our brain?
- The concept of storing data in our brain isn’t like storing data in hard drive at all. In Hard disk, Data is stored digitally in the form of tiny magnetized regions on the platter where each region represents a bit.
- But in our brain data is stored as circuit of neurons. During memory recall, electricity flows through the neural pathway associated with the memory.
- Few scientists claim our brain may have up to 100 billion neurons and each can make upto 1000 links, so 100 billion x 1000 = 100 trillion. Many say, Neurons can combine with each-other to make very complex circuits which increases the estimation of memory many fold, as high as many petabytes, enough to record TV programs in HD for few hundred years. But they were quick to admit that all this calculations are way too unreliable.
- What we store in hard disk is there in form of 0, 1. But our memory recreate itself on every recall because our brain stores different data in different places like visual data in visual cortex, amygdale stores emotions etc. So, recalling a whole event caused reassemble of data. That is why our memory changes a little every time we recall.
- For us, remembering means reconstruction of memory from scattered fragments. You can say Jurassic Park 4 movie is 16 gb. But when u recalling whole movie ur brain recreating it on-the-fly, that’s why it may be little different from real one though u didn’t missed a scene. Say, u try to recall Jurassic park 3 after that, brain would use many common fragments to recreate it. So, in your hard drive Jurassic Park 3 and 4 may be 14gb + 16gb, but in your brain those are fragmented data and brain have enough capacity to reconstruct them to a full movie. That is why every time you recall the movie some of the details would be little different or absent.
- In 2012, IBM successfully simulate 530 billion neurons and 100 trillion synapses using Blue Gene/Q super computer, still it was 1500 times slower than human brain, ignoring the fact, our brain process much complex inputs and routines.
- Forgotten, lost memories have been successfully retrieved through hypnosis which is evident that we normally don’t forget long-term memories. As our brain is constantly changing with every information and memory, we sometimes lose retrieval cue to some memory.
- Our brain keep changing with experiences, we can change our behavior through training. Brain just makes new synapses to retain new habits. Now it raises a big question. Can we train to increaser our empathy or can people lose their empathy because of external influences?