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Titolo:
The caudal infrasylvian surface in dyslexia - Novel magnetic resonance imaging-based findings
Autore:
Green, RL; Hutsler, JJ; Loftus, WC; Tramo, MJ; Thomas, CE; Silberfarb, AW; Nordgren, RE; Nordgren, RA; Gazzaniga, MS;
Indirizzi:
Dartmouth Med Sch, Dept Psychiat, Lebanon, NH 03756 USA Dartmouth Med SchLebanon NH USA 03756 pt Psychiat, Lebanon, NH 03756 USA Dartmouth Med Sch, Dept Pediat & Neurol, Lebanon, NH 03756 USA Dartmouth Med Sch Lebanon NH USA 03756 at & Neurol, Lebanon, NH 03756 USA Dartmouth Coll, Ctr Cognit Neurosci, Hanover, NH 03755 USA Dartmouth CollHanover NH USA 03755 ognit Neurosci, Hanover, NH 03755 USA Univ Calif Davis, Ctr Neurosci, Davis, CA 95616 USA Univ Calif Davis Davis CA USA 95616 is, Ctr Neurosci, Davis, CA 95616 USA Harvard Univ, Sch Med, Dept Neurobiol, Cambridge, MA 02138 USA Harvard Univ Cambridge MA USA 02138 pt Neurobiol, Cambridge, MA 02138 USA Massachusetts Gen Hosp, Cognit Behav Neurol Unit, Boston, MA 02114 USA Massachusetts Gen Hosp Boston MA USA 02114 rol Unit, Boston, MA 02114 USA
Titolo Testata:
NEUROLOGY
fascicolo: 5, volume: 53, anno: 1999,
pagine: 974 - 981
SICI:
0028-3878(19990922)53:5<974:TCISID>2.0.ZU;2-K
Fonte:
ISI
Lingua:
ENG
Soggetto:
PLANUM TEMPORALE ASYMMETRY; DEVELOPMENTAL DYSLEXIA; BRAIN MORPHOLOGY; LANGUAGE IMPAIRMENT; CEREBRAL STRUCTURE; SCHIZOPHRENIA; CHILDREN; CORTEX; AREA; MRI;
Keywords:
cerebral hemisphere; brain morphology; dyslexia; MRI;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Life Sciences
Citazioni:
40
Recensione:
Indirizzi per estratti:
Indirizzo: Green, RL Dartmouth Med Sch, Dept Psychiat, 1 Med Ctr Dr, Lebanon, NH 03756 USA Dartmouth Med Sch 1 Med Ctr Dr Lebanon NH USA 03756 NH 03756 USA
Citazione:
R.L. Green et al., "The caudal infrasylvian surface in dyslexia - Novel magnetic resonance imaging-based findings", NEUROLOGY, 53(5), 1999, pp. 974-981

Abstract

Objective: To detect anatomic abnormalities of auditory association cortexin dyslexia by measuring the area of the perisylvian region known as the caudal infrasylvian surface(s) (cIS) in dyslexic and control subjects. Background: Several quantitative morphometric investigations of cortical areas in dyslexia have focused on the cIS, which encompasses the supratemporal plane and the inferior bank of the posterior ascending ramus of the sylvian fissure. Inconsistencies in the results of these studies may be attributable in part to the use of measurement methods that do not account fully for surface undulations of the cIS. Methods: The authors used an MRI-based surfacereconstruction technique that models the curvature of the cerebral cortex in three dimensions to obtain whole-hemisphere and regional surface area estimates. Measurements were obtained in both hemispheres of eight right-handed male dyslexic subjects and eight right-handed male control subjects. Results: The cIS area of dyslexic subjects was significantly larger than that of control subjects, and this result was not attributable to a difference in whole-hemisphere surface area. Neither the dyslexic nor control subjects showed a left or right asymmetry in this region, although there was a trendtoward less variance of the asymmetry scores in dyslexic subjects. Conclusions: The gross anatomic organization of this region is different in dyslexic subjects, and elucidation of the precise nature of these differences maybe aided by surface modeling techniques.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 02/04/20 alle ore 16:46:46