Cerebral hemodynamics and processing speed during category learning

Schuepbach, Daniel; Bader, J P; Hell, Daniel; Baumgartner, Ralf W.

doi:10.1097/00001756-200405190-00023

Cited by 8 publications

(5 citation statements)

References 11 publications

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“…Such a relationship may only appear with greater degree of hypoxia: even at 78% SpO 2 only subtle cognitive deficit is found (Noble, Jones & Davies, 1993). Faster performance on cognitive tests is associated with higher mean CBFV in anterior cerebral vessels in sea‐level adults (Schuepbach, Bader, Hell & Baumgartner, 2004; Duschek, Schuepbck & Schandry, 2008). However, in the present study no correlation between psychomotor speed and CBFV was found.…”

Section: Discussionmentioning

confidence: 99%

Development of aptitude at altitude

Hogan¹,

Virués‐Ortega

Botti

et al. 2010

Developmental Science

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Millions of people currently live at altitudes in excess of 2500 metres, where oxygen supply is limited, but very little is known about the development of brain and behavioural function under such hypoxic conditions. We describe the physiological, cognitive and behavioural profile of a large cohort of infants (6-12 months), children (6-10 years) and adolescents (13-16 years) who were born and are living at three altitude locations in Bolivia ( approximately 500 m, approximately 2500 m and approximately 3700 m). Level of haemoglobin oxygen saturation and end-tidal carbon dioxide were significantly lower in all age groups living above 2500 metres, confirming the presence of hypoxia and hypocapnia, but without any detectable detriment to health. Infant measures of neurodevelopment and behaviour yielded comparable results across altitude groups. Neuropsychological assessment in children and adolescent groups indicated a minor reduction in psychomotor speed with increasing altitude, with no effect of age. This may result from slowing of underlying brain activity in parallel with reduced cerebral metabolism and blood flow, evidenced here by reduced cerebral blood flow velocity, particularly in the basilar artery, in children and adolescents. The proportion of European, Native American and African genetic admixture was comparable across altitude groups, suggesting that adaptation to high altitude in these children occurred in response to chronic hypoxic exposure irrespective of ethnic origin. Thus, psychomotor slowing is proposed to be an adaptive rather than a deficient trait, perhaps enabling accuracy of mental activity in hypoxic conditions.

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Section: Discussionmentioning

confidence: 99%

Development of aptitude at altitude

Hogan¹,

Virués‐Ortega

Botti

et al. 2010

Developmental Science

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“…Functional transcranial Doppler sonography (fTCD) has been shown to detect specific alterations in MFV during the WCST [ 10 , 12 , 13 ], the Tower of Hanoi (TOH) [ 12 ] and the SOC [ 11 ]. In a study in patients with schizophrenia, preliminary results suggested reduced MFV in the area of the MCA during performance of the TOH [ 14 ].…”

Section: Introductionmentioning

confidence: 99%

Association between two distinct executive tasks in schizophrenia: a functional transcranial Doppler sonography study

et al. 2006

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Background: Schizophrenia is a severe mental disorder involving impairments in executive functioning, which are important cognitive processes that can be assessed by planning tasks such as the Stockings of Cambridge (SOC), and tasks of rule learning/abstraction such as the Wisconsin Card Sorting Test (WCST). We undertook this study to investigate the association between performance during separate phases of SOC and WCST, including mean cerebral blood flow velocity (MFV) measurements in chronic schizophrenia.

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“…Так, D. Schuepbach и соавт. [36] при оценке эффектов устойчиво-сти и потери стратегии выполнения задания и изменения СК в СМА в обоих полушариях обнаруживали пик (макси-мум) в передних зонах, что свидетельствует о большей во-влеченности передних отделов.…”

Section: о б з о р ыunclassified

Transcranial Doppler Ultrasound Study of Brain Hemispheric Functional Specialization: A Review of Foreign Literature

Микадзе

Bogdanova

Лысенко

et al. 2016

RJTAO

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Изучение функциональной специализации полуша-рий и межполушарной асимметрии является предметом ис-следований в ряде нейронаук. Особый интерес представля-ет нейрокогнитивный подход, при использовании которого ставится задача описания структурно-функциональной ор-ганизации разных видов психической деятельности и вери-фикации ее психологической структуры и мозговой основы с помощью нейропсихологических и нейровизуализирую-щих методов [1]. Нейрокогнитивный подход, по словам Л. Сквайра, позволяет устанавливать важные связи между когнитивной психологией и неврологией [2].Для определения активности различных центров моз-га, отражающей переработку информации, используются электроэнцефалография (ЭЭГ) и различные нейровизуали-зирующие методы (функциональная магнитно-резонансная томография -фМРТ, позитронно-эмиссионная томо-графия -ПЭТ и др.), которые наряду с достоинствами име-ют определенные ограничения и недостатки, разные сте-пень сложности обслуживания и стоимость использования.Функциональная транскраниальная ультразвуковая допплерография (ФТКУЗДГ) -сравнительно недорогой, неинвазивный и безболезненный метод оценки скорости кровотока (СК). ФТКУЗДГ обеспечивает высокое времен-ное разрешение, гораздо более высокое, чем, например, фМРТ. При ее проведении пациент не должен оставаться неподвижным, наличие металлических имплантатов, татуи-ровок не влияет на результаты исследования, метод являет-ся щадящим для людей, страдающих клаустрофобией.

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Cerebral hemodynamics and processing speed during category learning

Cited by 8 publications

References 11 publications

Development of aptitude at altitude

Development of aptitude at altitude

Association between two distinct executive tasks in schizophrenia: a functional transcranial Doppler sonography study

Transcranial Doppler Ultrasound Study of Brain Hemispheric Functional Specialization: A Review of Foreign Literature

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