Labyrinthine Disturbance Following Head Injury -Clinical Statistical Survey-

Otoneurological survey on the 62 patients with labyrinthine disturbance due to head injury was done on the statistical standpoint of view and the following results were obtained. 1)Righting reflex test revealed that 67% of the patients examined was disturbed. Groups of head trauma Type II and Type III, in which trauma on the temporal region, showed high incidence of labyrinthine disturbance. 2)Deviation phenomenon appeared in 45% on the patients. Groups of head trauma Type II and Type III, in which especially due to tenporal and occipital contusion, showed in higher incidence than the other groups. 3)Spontaneous nystagmus was observed in 43% of the patients. Head positon hystagmus was observed in 30%. Head posioning nystagmus was seen in 19% of the patients. Group of head trauma Type II showed higher incidence. 4)Abnormal caloric response was seen in 53% of the patients. Hypoexcitability (canal paresis) was major finding. Groups of head trauma Type II and Type III showed higher incidence. 5)Rotation test revealed abnormal response in 41% of the patients, showing hypoexcitability. Case of the temporal contusion showed in high incidence. 6)Optokinetic nystagmus reaction was disturbed in 27% of patients. Groups of head trauma Type II, and TypeIII of the temporal contusion, showed in higher incidence. 7)Eye-tracking test revealed that 35% of the patients was abnormal in persuit eye movements. Group of head trauma Type II showed in high incidence. Conclusively, thirty percent of the patients with vertigo following head injury was considered due to contral origin disturbance.