Abstract:
:The substantia innominata (SI) contains the nucleus basalis of Meynert, which provides the major cholinergic innervation to the entire cortical mantel and the amygdala; degeneration of nucleus basalis neurons correlates with cognitive decline in Alzheimer's disease (AD). However, whether SI atrophy occurs in individuals with amnestic mild cognitive impairment (aMCI) has not been examined thoroughly in vivo. In the present study, we developed a new protocol to measure volumetric changes in the SI from magnetic resonance imaging (MRI) scans. Participants consisted of 27 elderly controls with no cognitive impairment (NCI); 33 individuals with aMCI; and 19 patients with mild AD. SI volumes were traced on three consecutive gapless 1mm thick coronal slices. Results showed that SI volume was significantly reduced in the mild AD group compared to both NCI and aMCI participants; however, the NCI and aMCI groups did not differ from each other. Furthermore, a decrease in SI volume was related to impaired performance on declarative memory tasks even when attention was controlled.
journal_name
Neurobiol Agingjournal_title
Neurobiology of agingauthors
George S,Mufson EJ,Leurgans S,Shah RC,Ferrari C,deToledo-Morrell Ldoi
10.1016/j.neurobiolaging.2009.11.006subject
Has Abstractpub_date
2011-10-01 00:00:00pages
1756-64issue
10eissn
0197-4580issn
1558-1497pii
S0197-4580(09)00366-2journal_volume
32pub_type
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