according to their results the initial disturbances of the autonomic nervous system in childhood diabetes may appear relatively early -- before the preclinical stage of retinal microangiopathy -- showing the untimely dysfunction of the parasympathetic nervous system , on the other hand the signs relating to disturbance of the sympathetic nervous system ( heart rate ratio on standing/lying , orthostatic blood-pressure decrease ) become only in preclinical retinopathic children positive .
C0004388
autonomic nervous system
C0039044
sympathetic nervous system