OBJECTIVE: To estimate the incidence of olfactory dysfunction across traumatic brain injury (TBI) severity and decision-making deficits with regard to intracranial lesions' location and laterality. METHOD: A 1-year prospective study including 115 participants (16-55 years) with mild, moderate, and severe TBI. The Brief Smell Identification Test was used 3 months postinjury with a follow-up testing of olfactory dysfunction at 1 year. The Iowa Gambling Task (IGT) and 3 tasks of the Delis-Kaplan Executive Function System were administered 3-months postinjury. MRI was performed 1-year postinjury and TBI severity groups were then divided with respect to frontal, fronto-temporal, diffuse, and no lesions. RESULTS: The incidence of olfactory dysfunction was estimated to be 22.3% at 3 months and 13.5% at 1 year. No significant differences were found on olfactory dysfunction across TBI severity at either check. Anosmia was identified in 10% with severe TBI and 3% with mild TBI. Olfactory dysfunction was associated with verbal fluency tasks. Repeated-measures analysis of variance revealed no significant effect over blocks on IGT, and no main group or interaction effects regarding TBI severity, lesions' location, or laterality. IGT performance at 3-months postinjury was deficient in 83% of persons with intracranial lesions and 71% of those without lesions. CONCLUSIONS: Olfactory dysfunction is independent of TBI severity, showing improvements in one third of cases from 3- to 12-months postinjury. However, anosmia was related to TBI severity. There is evidence for marked decision-making deficits after TBI, all subgroups performed similarly and failed to develop an advantageous strategy over time.
OBJECTIVE: To estimate the incidence of olfactory dysfunction across traumatic brain injury (TBI) severity and decision-making deficits with regard to intracranial lesions' location and laterality. METHOD: A 1-year prospective study including 115 participants (16-55 years) with mild, moderate, and severe TBI. The Brief Smell Identification Test was used 3 months postinjury with a follow-up testing of olfactory dysfunction at 1 year. The Iowa Gambling Task (IGT) and 3 tasks of the Delis-Kaplan Executive Function System were administered 3-months postinjury. MRI was performed 1-year postinjury and TBI severity groups were then divided with respect to frontal, fronto-temporal, diffuse, and no lesions. RESULTS: The incidence of olfactory dysfunction was estimated to be 22.3% at 3 months and 13.5% at 1 year. No significant differences were found on olfactory dysfunction across TBI severity at either check. Anosmia was identified in 10% with severe TBI and 3% with mild TBI. Olfactory dysfunction was associated with verbal fluency tasks. Repeated-measures analysis of variance revealed no significant effect over blocks on IGT, and no main group or interaction effects regarding TBI severity, lesions' location, or laterality. IGT performance at 3-months postinjury was deficient in 83% of persons with intracranial lesions and 71% of those without lesions. CONCLUSIONS:Olfactory dysfunction is independent of TBI severity, showing improvements in one third of cases from 3- to 12-months postinjury. However, anosmia was related to TBI severity. There is evidence for marked decision-making deficits after TBI, all subgroups performed similarly and failed to develop an advantageous strategy over time.
Authors: Michael L Alosco; Johnny Jarnagin; Yorghos Tripodis; Michael Platt; Brett Martin; Christine E Chaisson; Christine M Baugh; Nathan G Fritts; Robert C Cantu; Robert A Stern Journal: J Neurotrauma Date: 2016-08-11 Impact factor: 5.269
Authors: Su Xu; Jiachen Zhuo; Jennifer Racz; Da Shi; Steven Roys; Gary Fiskum; Rao Gullapalli Journal: J Neurotrauma Date: 2011-09-29 Impact factor: 5.269
Authors: Trinity K Shaver; Jenny E Ozga; Binxing Zhu; Karen G Anderson; Kris M Martens; Cole Vonder Haar Journal: Brain Res Date: 2018-10-05 Impact factor: 3.610