RESUMO
BACKGROUND: Mal de debarquement (MdD) literally means "sickness of disembarkation", and refers to the illusion of movement perceived as an after-effect of traveling on a boat, train, or airplane. The pathophysiology of MdD is currently unknown. CASE REPORT: A 20-year-old man presented with dizziness and swaying sensation for 3 days after a boat trip. Compared with the follow-up EEG without symptoms, the EEG recorded while having MdD symptoms disclosed a significantly decreased alpha-band current source density at the precentral gyrus of the left frontal lobe and increased beta-2 activity at the parahippocampal gyrus of right mesial temporal region. CONCLUSIONS: Our results provide evidence of deranged cortical activity in MdD. To the best of our knowledge this is the first study to document cortical correlates of MdD using an EEG source-localization method.
Assuntos
Humanos , Adulto Jovem , Aeronaves , Encéfalo , Tontura , Eletroencefalografia , Seguimentos , Lobo Frontal , Ilusões , Imãs , Enjoo devido ao Movimento , Giro Para-Hipocampal , Sensação , Navios , Lobo Temporal , VertigemRESUMO
Mal de debarquement syndrome refers to the prolonged sensation of rocking and swaying that is experienced on the return to land following a sea voyage or an air travel. We report a man who developed mal de debarquement syndrome after a 4-day-boat-trip. Apogeotropic nystagmus during head turning in supine position was the only finding. Mal de debarquement syndrome should be considered in the differential diagnosis of direction-changing positional nystagmus, especially when patients do not complain of vertigo with nystagmus.