Latvian[edit] From an earlier abu, still dialectally attested (abi was originally the feminine/neuter dual form), from Proto-Baltic *abu, from Proto-Indo-European *a(m)-bÊ°ou, where the initial part is an old deictic pronoun or particle, reinforcing the meaning âtwo, bothâ of the second part.
Parkinson's disease is caused by the progressive impairment or deterioration of neurons (nerve cells) in an area of the brain known as the substantia nigra.When functioning normally, these neurons produce a vital brain chemical known as dopamine.arkinson's disease is caused by the progressive impairment or deterioration of neurons (nerve cells) in an area of the brain known as the substantia nigra.
Parkinson's Disease. Parkinson's disease may be a slowly progressive disorder that affects movement, muscle control, and balance. a part of the disease method develops as cells are destroyed in certain components of the brain stem, particularly the crescent cell mass referred to as the nucleus niger. Parkinson's disease develops as cells are destroyed in certain components of the brain stem, particularly the crescent cell mass referred to as the nucleus niger. 2  The lack of a chemical traveller, referred to as monoamine neurotransmitter, in the brain is claimed to be the main cause for the Parkinson's disease.