Memory deficit
When a person is unable to encode, store and recall information which is otherwise easily done by the general population, memory deficit is said to occur.
Memory deficit can affect episodic, working, semantic, or procedural memory. Deficit might result from lesions in the hippocampus, prefrontal cortex, angular gyrus, limbic circuits, temporal lobes, cerebellum, basal ganglia, or supplementary motor area.
However, in many cases, memory is encoded properly in the hippocampus, but patients have trouble retrieving the stored memory. This retrieval deficit is usually due to problems with frontal lobe function, typically caused by white matter disease.
Neurodegenerative disease which is said to cause chronic symptoms, inflammatory disease usually found causing subacute symptoms, and neurologic conditions such as seizure or migraine cause acute symptoms. Besides, Neurodegenerative, neurologic, inflammatory, infectious, traumatic, endocrine, vascular, neoplastic, and metabolic conditions are all capable of causing loss of memory content.