good question.
Nerves need sugar for energy, and to function properly.
acetylcholine
All the nerves that located in the face and head will be affected. These are called the cranial nerves and there are twelve of them. The ones most commonly known to be affected are the Trigeminal Nerve (CN V), Facial Nerve (CN VII), and the Vagus Nerve (CN X).
The lower two nerves (C8 and T1) are most commonly affected in 90% of persons, following the ulnar nerve distribution.
Arms, shoulders, and hands
1 called the facial nerve.
sinoatrial node
it loses control over the nerves.
The myelin sheath surrounding nerves.
nervous syestem..
The second most common nerve root involvement occurs in brachial plexus nerves C5, C6, and C7, and symptoms, if these nerves are affected, can be referred to upper back, upper chest, ear, neck, and outer arm that follows a radial nerve distribution.