Of or pertaining to James the First, of England, or of his reign or times; especially, pertaining to a style of architecture and decoration popular in the time of James I.; as, Jacobean writers. Etymology: From L. Jacobus James.
ALS is a progressive, degenerative disease of the nervous system. It is one of a group of diseases, called motor neuron diseases (MND), in which specialized nerve cells that control movement of the voluntary muscles gradually cease functioning and die. Fasciculation is a sign of muscle irritability, as the normal action of the lower motor neuron on the muscle is impaired. 2  The sole involvement of lower motor neurons can be seen in a form of ALS called progressive muscular atrophy.
Multiple system atrophy (MSA) with postural hypotension, also called Shy-Drager syndrome, is a progressive disorder of the central and sympathetic nervous systems.ultiple system atrophy (MSA) with postural hypotension, also called Shy-Drager syndrome, is a progressive disorder of the central and sympathetic nervous systems.