3. Effects on Nervous system increase excitability of central nervous system sympathetic nervous system a Hyperthyroidism extreme nervousness, many psychoneurotic tendencies including anxiety complexes, extreme worrv paranoia(妄想)and muscle tremor Hyperthyroidism. Hyperthyroidism 3. Effects on Nervous System ◼ increase excitability of ◼ central nervous system ◼ sympathetic nervous system ◼ Hyperthyroidism: ◼ extreme nervousness, ◼ many psychoneurotic tendencies including anxiety complexes, extreme worry, paranoia （妄想）and muscle tremor