الفهرس 
Introduction and aim of the workOnly 14 pages are availabe for public view
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Abstract
Memory can be defined as the capacity for treating experiences and reproducing them when needed. Memory is based on three essential r pesses which is learning, retention, and remembering. The review of this study is mainly concerned with memory and its , rders which seems to be some importance especially after the recent ances achieved in this field over the past years. Some of the sifications of memory were displayed. These might help identify different presentations of memory disturbances which actually differ from disease entity to another . According to physiology of memory, it can be classified according to Dry function into physiological classification which based on: sensory ,Dry, primary memory (short term) and secondary memory (long term) Short term memory being based on reverbrating circuits and posttetanic ic potentiation theory. While long term memory is based on synaptic iges and on changes in molecular proteins ( DNA, and RNA). SycnoJogical classification consrsrs or declarative and non ararive memory. Associative memory is based on classical conditioning non associative memory is based on habituation and sensitization.under the same classification is the working and reference memories, the Former being concerned with ordering and expressing ones thoughts about specific subjects, while the latter is related to spontaneous daily tasks and habits. practice memory is usually tested as immediate memory, memory and remote past presidents, public events, or identification.