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Objective: We aimed to assess vulnerability in the lower brain stem at the patients with the pseudoseizure subtype of conversion disorder by vestibular evoked myogenic potentials (VEMP) in this study. Methods: In the study, 22 women with the diagnosis of conversion disorder which show convulsions according to SCID-I/CV and 22 healthy women are taken to assessment. After administration of SCID-I/CV by an experienced investigator to the patients and healthy controls, the sociodemographic data form, Hamilton Depression Rating Scale and Hamilton Anxiety Rating Scale were administered. VEMP evaluation performed at the patients and healthy control groups in a neurology laboratory. Results: P1 latency is no statistically significant difference at the patients with pseudoseizure compared to healthy control groups in the VEMP assessment at the right and left. Similarly, N1 latency values are no statistically significant difference between the patient and control groups. Right and left P1-N1 amplitude values no statistically significant difference at the patients with pseudoseizure compared to control groups values. Discussion: VEMP values no statistically significant difference at the patient compared to control groups at this study which it aimed to assess lower brain stem at the patients with the pseudoseizure subtype of conversion disorder by VEMP. This result is well adjusted hypothesis of increased corticofugal inhibition of afferent stimuli. However If P1-N1 (inhibition component) and N23-P44 (exitation component) components of VEMP waves to being careful, this subject will clear up. This study can plan again at the widely patients groups with deconvolution method and include other subtype of conversion disorder. [Anadolu Psikiyatri Derg 2013; 14(4.000): 318-324]