Impaired coordination Dysautonomia : tachycardia (rapid heart), syncope (fainting), polydipsia (extreme thirst), chronic fatigue The blockage of Cerebro-Spinal Fluid (CSF) flow may also cause a syrinx to form, eventually leading to syringomyelia . Central cord symptoms such as hand weakness, dissociated sensory loss, and, in severe cases, paralysis may occur. I