1) SENSORY REGISTER :
Sensory register is the first stage of memory.The stage lasts for 10 seconds.As soon as we hear or see things, the information remains in our brain for just 10 seconds which is relatively very short time after which the information fades out from our memory. However very few details of what we have seen or heard remains & this information is than passed to the next stage which is Short Term Memory .
2) SHORT TERM MEMORY
The information from the sensory register is now processed in the short term memory,the information is rearranged & send to our Long Term Memory which is a relatively permanent memory.When ever we recall any information the information stored Long term memory back to Short term memory.
3) LONG TERM MEMORY :
Long Term Memory is relatively permanent memory. It is basically a store house & when ever we need any stored information it comes & goes to the Short Term Memory.However the information from Long Term Memory gets vanished if it is not used or updated for very long time & as a result when to recall any information after many years or months we are just able to recall the information in bits or pieces.