Abstract:
OBJECTIVE:This study was conducted to determine the relationship of frontal lobe cortical thickness and basal ganglia volumes to measures of cognition in adults with sickle cell anemia (SCA). METHODS:Participants included 120 adults with SCA with no history of neurologic dysfunction and 33 healthy controls (HCs). Participants were enrolled at 12 medical center sites, and raters were blinded to diagnostic group. We hypothesized that individuals with SCA would exhibit reductions in frontal lobe cortex thickness and reduced basal ganglia and thalamus volumes compared with HCs and that these structural brain abnormalities would be associated with measures of cognitive functioning (Wechsler Adult Intelligence Scale, 3rd edition). RESULTS:After adjusting for age, sex, education level, and intracranial volume, participants with SCA exhibited thinner frontal lobe cortex (t = -2.99, p = 0.003) and reduced basal ganglia and thalamus volumes compared with HCs (t = -3.95, p < 0.001). Reduced volume of the basal ganglia and thalamus was significantly associated with lower Performance IQ (model estimate = 3.75, p = 0.004) as well as lower Perceptual Organization (model estimate = 1.44, p = 0.007) and Working Memory scores (model estimate = 1.37, p = 0.015). Frontal lobe cortex thickness was not significantly associated with any cognitive measures. CONCLUSIONS:Our findings suggest that basal ganglia and thalamus abnormalities may represent a particularly salient contributor to cognitive dysfunction in adults with SCA.
journal_name
Neurologyjournal_title
Neurologyauthors
Mackin RS,Insel P,Truran D,Vichinsky EP,Neumayr LD,Armstrong FD,Gold JI,Kesler K,Brewer J,Weiner MW,Neuropsychological Dysfunction and Neuroimaging Adult Sickle Cell Anemia Study Group.doi
10.1212/WNL.0000000000000188subject
Has Abstractpub_date
2014-03-11 00:00:00pages
835-41issue
10eissn
0028-3878issn
1526-632Xpii
WNL.0000000000000188journal_volume
82pub_type
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