the schema in table 1 illustrates the inter-relationship between the major fluid and electrolyte disturbances with their primary site of involvement , that is , the cns or peripheral nervous system ( pns ) , their primary effect ( nervous system depression or irritability ) , and the major symptom complex associated with these sites and mechanisms ( obtundation , seizures , muscle weakness , and tetany ) .
C0206417
peripheral nervous system
C0027763
nervous system