title: [Posttraumatic anosmia: olfactory event related potentials and MRI evaluation].
abstract: OBJECTIVE
  Using olfactory event related potentials (OERP) and magnetic resonance to evaluate olfactory function in patients with posttraumatic anosmia.
  
  
  METHODS
  Twenty four patients with posttraumatic anosmia were reviewed retrospectively. A thorough medical history, physical examination, nasal endoscopy, T&T olfactory testing, olfactory event-related potentials, brain computed tomography scan and magnetic resonance image of olfactory pathway were performed in all patients.
  
  
  RESULTS
  Subjective olfactory testing indicated 20 of 24 patients were birhinal anosmia, 2 with right nostril anosmia and left impairment, 2 with left anosmia and right normal. No OERP were obtained in 24 (20 were birhinal, 4 was monorhinal), except 4 cases with single nostril. Magnetic resonance imaging revealed the injures to the olfactory bulbs (100%), rectus gyrus (91.7%), orbital gyrus (67%), olfactory tracts (8%) and temporal lobes (8%).
  
  
  CONCLUSIONS
  OERP can objectively evaluate posttraumatic olfactory function, and magnetic resonance of olfactory pathway can precisely identify the location and extent of injures.
authors.affiliation: Department of Otorhinolaryngology, China-Japen Friendship Hospital, Beijing 100029, China.
authors.forename: Jian-Feng
authors.initials: JF
authors.lastname: Liu
authors.forename: Hui
authors.initials: H
authors.lastname: You
authors.forename: Dao-Feng
authors.initials: DF
authors.lastname: Ni
authors.forename: Qiu-Hang
authors.initials: QH
authors.lastname: Zhang
authors.forename: Da-Zhang
authors.initials: DZ
authors.lastname: Yang
authors.forename: Na-Ya
authors.initials: NY
authors.lastname: Wang
mesh_terms: D000328:Adult; D006259:Craniocerebral Trauma / Q000150:complications; D005071:Evoked Potentials; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D000857:Olfaction Disorders / Q000209:etiology / Q000473:pathology* / Q000503:physiopathology*; D012189:Retrospective Studies