Melasma Causes. Melasma is usually caused by the sun, hormones in birth control pills, hormone replacement therapy, medications and pregnancy. When Melasma is caused by pregnancy it is called chloasma. In some women, when the skin is exposed to sunlight, brown blotches of excess pigment form due to the interaction with hormones or chemicals. Melasma is believed to be hereditary and woman with darker skin tones tend to be more at risk for this disorder.
Some research suggests that the hippocampus may participate only in consolidation processes lasting a few years. The entorhinal cortex, on the other hand, gives evidence of temporally graded changes extending up to 20 years, suggesting that it is this region that participates in memory consolidation over decades. The entorhinal cortex is damaged in the early stages of Alzheimerâs disease.
Another type of memory in human brain is declarative memory. This is a very conscious form of memory. It involves the kind of learning and recall that you are very aware of and probably initiated.e use it every single second of the day. It helps us recall, learn, study, think etc. Memory of the brain is located in the hippocampus, which processes things that happen. Memories are stored in the cerebral cortex (new or old).