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.
Parkinsonâs is caused by the degeneration of brain cells (neurons) in an area of the brain called the substantia nigra. These neurons are responsible for the production of a particular neurotransmitter (chemical messenger in the brain) called dopamine and it is the lack of this neurotransmitter that is responsible for the main Parkinsonâs symptoms.