Amnesia CT
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Zehra Malik, M.B.B.S[2]
Overview
Head CT scan may be helpful in the diagnosis of the cause of amnesia. Structural and functional abnormalities are identified to detect any bleeding, stroke, tumor, atrophy or any changes suggestive of amnesia.
CT scan
- CT scan showed reduced blood flow to occipital lobe, caudate nucleus, and frontal lobe gray matter in patients suffering from post-traumatic amnesia. The blood flow was also observed to return back to normal once the memory is regained.[1]
- In dissociative amnesia there is no structural brain damage. CT scan looks normal. Although PET scan shows hypometabolism in areas responsible for autobiographical memory.[2]
- No CT scan abnormalities characteristic of transient global amnesia have been reported. However, the underlying cause of transient global amnesia including brain ischemia can be observed on CT.[3]
- CT scan findings suggestive of Alzheimer's disease includes cerebral atrophy, enlargement of cerebral sulci, third ventricle and lateral ventricles, decreased gyral volume. [4] [5]
References
- ↑ Metting Z, Rödiger LA, de Jong BM, Stewart RE, Kremer BP, van der Naalt J (2010). "Acute cerebral perfusion CT abnormalities associated with posttraumatic amnesia in mild head injury". J Neurotrauma. 27 (12): 2183–9. doi:10.1089/neu.2010.1395. PMID 20939700.
- ↑ Brand M, Eggers C, Reinhold N, Fujiwara E, Kessler J, Heiss WD; et al. (2009). "Functional brain imaging in 14 patients with dissociative amnesia reveals right inferolateral prefrontal hypometabolism". Psychiatry Res. 174 (1): 32–9. doi:10.1016/j.pscychresns.2009.03.008. PMID 19783409.
- ↑ Profice P, Rizzello V, Pennestrì F, Pilato F, Della Marca G, Sestito A; et al. (2008). "Transient global amnesia during transoesophageal echocardiogram". Neurol Sci. 29 (6): 477–9. doi:10.1007/s10072-008-1034-y. PMID 19031042.
- ↑ Cuttler JM, Moore ER, Hosfeld VD, Nadolski DL (2016). "Treatment of Alzheimer Disease With CT Scans: A Case Report". Dose Response. 14 (2): 1559325816640073. doi:10.1177/1559325816640073. PMC 4826954. PMID 27103883.
- ↑ Chiaravalloti A, Fiorentini A, Ursini F, Martorana A, Koch G, Belli L; et al. (2016). "Is cerebral glucose metabolism related to blood-brain barrier dysfunction and intrathecal IgG synthesis in Alzheimer disease?: A 18F-FDG PET/CT study". Medicine (Baltimore). 95 (37): e4206. doi:10.1097/MD.0000000000004206. PMC 5402543. PMID 27631200.