Functional magnetic resonance imaging of auditory cortex in children

Ulualp, Seckin O.; Biswal, Bharat B.; Yetkin, Funda; Kidder, Thomas M.

doi:10.1097/00005537-199812000-00004

Cited by 36 publications

(26 citation statements)

References 20 publications

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“…In an initial study using a passive listening paradigm, Ulualp et al [26] found that children 6 to 10 years of age showed consistent activation in both the primary and secondary auditory cortices, with no hemispheric dominance when listening to text presentation. They found significant bilateral activation in the superior temporal gyrus, Heschl's gyrus, planum temporale, anterior cingulate, and inferior frontal regions.…”

Section: Language Network In Normal Childrenmentioning

confidence: 99%

Organization of language networks in children: Functional magnetic resonance imaging studies

Sachs

Gaillard

2003

Curr Neurol Neurosci Rep

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Functional magnetic resonance imaging (fMRI) is a relatively new neuroimaging procedure that has been used to study a wide variety of cognitive phenomena in adults, including attention, language, and memory. More recently, this technique has been successfully applied to pediatric populations as well. In particular, many investigators have employed fMRI as a tool to study language development in normal children. This paper reviews the current imaging research on the identification of cortex subserving components of language processing in young children. The literature suggests that fMRI can successfully identify regions of language cortex in children in much the same capacity as it can with adults, and that generally, adults and children show fundamental similarities in the patterns of activation. However, special considerations with pediatric imaging, paradigm design, and image analysis are also discussed.

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Section: Language Network In Normal Childrenmentioning

confidence: 99%

Organization of language networks in children: Functional magnetic resonance imaging studies

Sachs

Gaillard

2003

Curr Neurol Neurosci Rep

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“…Unilateral lesions may cause auditory agnosia (3,5). Heschl gyrus is an important anatomical landmark for functional MRI applications, which is a relatively new method showing cortical activation (4,6). Heschl gyrus and planum temporale morphology have been studied in various psychiatric disorders, especially schizophrenia.…”

Section: Discussionmentioning

confidence: 99%

“…However, unilateral lesions in auditory cortex may lead to auditory agnosia. Determination of auditory cortex is also important for the functional magnetic resonance (MR) imaging studies (4). Besides auditory disorders, Heschl's gyrus morphology may be affected in different diseases.…”

Section: Introductionmentioning

confidence: 99%

Heschl’s Transverse Gyri: Anatomy and Morphological Variations

Karaali̇¹,

Aytaç²,

Utku³

et al. 2016

Akd Med J

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Objective: Heschl's gyrus is the primary auditory cortex in humans. It is located in the posterior part of the area on the superior surface of the temporal lobe, or the planum temporale. The number and shape of this gyrus may differ. In this study, we aimed to investigate the number and shape variations of the Heschl gyrus in normal subjects by using MRI. Material and Methods:Eighty hemispheres in 40 subjects were evaluated. Of these subjects, 18 were patients with headache, evaluated in our MR imaging unit, and 22 were healthy volunteers. After the routine sequences, three dimensional transverse T1-weighted fast field echo images were obtained. The shape of the gyrus was classified as omega or heart shaped according to the images. The number of gyri in each hemisphere was noted. Number and shapes were analyzed according to right/left and dominant/non-dominant. Results:Of the 80 hemispheres, a single gyrus was present in 67 (%84) and two gyri were present in 13 (%16). Three or more Heschl gyri were not seen. Of the total 93 Heschl gyri, 79 (%85) were omega shaped and 14 (%15) were heart shaped. With regard to dominance; thirty-six of the dominant hemispheres had one and 4 had two Heschl gyri. Thirty-one of the non-dominant hemispheres had one and 9 had two gyri. Conclusion:Our study shows that, among normal subjects, the number and shape of Heschl's gyrus may show variations. In clinical investigations where the identification of this gyrus is needed, such as functional MRI studies, these variations should not be overlooked.Key Words: Brain, Anatomy, Heschl's gyrus, MR imaging ÖZ Amaç: Heschl'in transvers girusları temporal lobun üst yüzününün arka kısmında yer alır. Primer işitme merkezi burada bulunur. Heschl'in transvers giruslarının morfolojisi işitme ile ilgili semptomları olan hastaların değerlendirilmesi sırasında önemli olabilmektedir. Çalışmamızın amacı Heschl'in transvers giruslarının morfolojik varyasyonlarını tanımlamak ve bu varyasyonların klinik önemini vurgulamaktır. Gereç ve Yöntemler:Çalışmaya, Radyoloji Anabilim Dalı MRG ünitesinde değerlendirilen ve baş-vuru yakınması başağrısı olan 18 hasta ve 22 sağlıklı gönüllü olmak üzere toplam 40 olgu dahil edilmiştir. Patolojisi bulunmayan ve çalışmaya alınan olgulara transvers düzlemde 3 boyutlu ince kesitli T1 ağırlıklı gradient eko görüntüler alındı. Girus, sagittal ve koronal reformat görüntülere göre omega ya da kalp şekilli olarak sınıflandı. Ayrıca girus sayı ve şekilleri hemisferik dominansa göre de analiz edildi.Bulgular: Kırk olgudaki 80 hemisferin 67'sinde (%84) tek, 13'ünde (%16) ise 2 adet Heschl girusu saptandı. Üç veya daha fazla Heschl girusu olan hemisfer yoktu. 93 Heschl girusunun 79'u omega, 14'ü ise kalp şeklinde idi. Hemisferik dominans açısından değerlendirildiğinde otuzaltı dominant hemisferde dört, otuzbir nondominant hemisferde 9 tanesinde iki Heschl girusu saptandı.

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“…Aspects of language studied include reading [21•,31], word generation [30•,32,33•,34], story listening [35,36], spelling [34], sentence comprehension [37,38•], auditory rhyming [39] and semantic decision [39,40]. Word generation tasks consistently activate areas of the left frontal lobe, including inferior frontal gyrus, middle frontal gyrus, and dorsolateral prefrontal cortex [30•,32,33•,34].…”

Section: Normal Volunteer Child Studiesmentioning

confidence: 99%

The utility of functional magnetic resonance imaging in epilepsy and language

Balsamo

Gaillard

2002

Curr Neurol Neurosci Rep

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Functional magnetic resonance imaging (fMRI) is a viable presurgical tool for use with the pediatric epilepsy population as replacement for the intra-carotid sodium amobarbital test (IAT) used to identify hemispheric language dominance. This paper reviews the current imaging research on the identification of language cortex in pediatric epilepsy patients and in normal children. A review of the literature comparing fMRI to the IAT and electrocortical stimulation suggests that fMRI reliably identifies the dominant hemisphere, with pediatric and adult studies producing comparable results. Within-hemisphere localization of eloquent cortex with fMRI is more problematic. Paradigm selection, data analysis techniques, and considerations specific to imaging children are discussed. Utility of fMRI for studying neural plasticity as a result of brain insult (e.g., epilepsy) is also considered.

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Functional magnetic resonance imaging of auditory cortex in children

Cited by 36 publications

References 20 publications

Organization of language networks in children: Functional magnetic resonance imaging studies

Organization of language networks in children: Functional magnetic resonance imaging studies

Heschl’s Transverse Gyri: Anatomy and Morphological Variations

The utility of functional magnetic resonance imaging in epilepsy and language

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