<Li> Transient epileptic amnesia is a rare and unrecognized form of temporal lobe epilepsy, which is typically an episodic isolated memory loss . It has been recognized as a treatment - responsive syndrome congenial to anti-epileptic drugs . </Li> <P> Patients with amnesia can learn new information, particularly non-declarative knowledge . However, some patients with dense anterograde amnesia do not remember the episodes during which they learned or observed the information previously . </P> <P> Some patients with anterograde amnesia can still acquire some semantic information, even though it might be more difficult and might remain rather unrelated to more general knowledge . H.M. could accurately draw a floor plan of the home in which he lived after surgery, even though he had not lived there in years . The reason patients could not form new episodic memories is likely because the CA1 region of the hippocampus was lesion, and thus the hippocampus could not make connections to the cortex . After an ischemic episode following surgery, an MRI of patient R.B. showed his hippocampus to be intact except for a specific lesion restricted to the CA1 pyramidal cells . </P> <P> Some retrograde and anterograde amnesics are capable of non-declarative memory, including implicit learning and procedural learning . For example, some patients show improvement on the pseudorandom sequences experiment as healthy people do . Therefore, procedural learning can proceed independently of the brain system required for declarative memory . According to fMRI studies, the acquisition of procedural memories activates the basal ganglia, the premotor cortex and the supplementary motor area, regions which are not normally associated with the formation of declarative memories . This type of dissociation between declarative and procedural memory can also be found in patients with diencephalic amnesia such as Korsakoff's syndrome . Another example demonstrated by some patients, such as K.C. and H.M, who have medial temporal damage and anterograde amnesia, still have perceptual priming . Those patients did well in the word fragment completion test . </P>

Who was there for you when you had amnesia you know i can't remember that