Role of diffusion tensor imaging in the diagnosis and management of post-traumatic anosmia
2017; Taylor & Francis; Volume: 31; Issue: 13-14 Linguagem: Inglês
10.1080/02699052.2017.1346293
ISSN1362-301X
AutoresLilla Bonanno, Silvia Marino, Simona De Salvo, Rosella Ciurleo, Antônio Gomes da Costa, Daniele Bruschetta, Demetrio Milardi, Francesco Galletti, Placido Bramanti, Fabrizia Caminiti,
Tópico(s)Vestibular and auditory disorders
ResumoIntroduction: Anosmia is a possible complication of Traumatic Brain Injury (TBI). Psychometric and electrophysiological methods of olfaction measure and Magnetic Resonance Imaging (MRI) are the tools to evaluate the post-traumatic olfactory loss. Diffusion Tensor Imaging (DTI) provides useful data for a better understanding of etiopathogenesis TBI-related anosmia, in particular the loss of neural connections and their eventual recovery over time.Materials and methods: This study describes a case of TBI-related anosmia. The olfactory function was evaluated by Sniffin' Sticks Test (SST), Olfactory Event-Related Potentials (OERPs), MRI and DTI at baseline (T0) and after one year (T1).Results: At baseline, SST highlighted a functional anosmia. The OERPs showed the presence of a small N1–P2 complex. MRI confirmed the presence of a scarring involved in the right orbitofrontal cortex (OFC). DTI detected a reduction in the average length and the number of neuronal fibre pathways of right OFC. At T1, a recovery of olfactory function was confirmed by SST and OERPs.Conclusion: While MRI images are unchanged from T0, DTI showed an increase in average length and number of fibre tracts in the right OFC. DTI could be a valid tool to display a post-traumatic loss of neural connections and to better understand TBI-recovery mechanisms.
Referência(s)