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Foreign Accent Syndrome: insights from Neuroimaging and Pathophysiological mechanisms.
Acta Neurol Belg
November 2024
Faculty of Medicine, Grigore T. Popa University of Medicine and Pharmacy, Iași, 700115, Romania.
Foreign Accent Syndrome (FAS) is a rare and complex speech disorder characterized by the sudden emergence of a foreign accent, typically following neurological events such as strokes, traumatic brain injuries, or neurodegenerative diseases. This comprehensive review explores the pathophysiology, neuroimaging findings, and prevalence of FAS. Neuroimaging studies, including MRI and fMRI, reveal significant brain reorganization predominantly in the left hemisphere, involving regions such as the superior temporal gyrus and medial frontal structures.
View Article and Find Full Text PDFReduced cerebral blood flow and cognitive dysfunction following isolated cerebellar infarction: two case reports.
J Int Med Res
March 2024
Department of Rehabilitation, Beijing Tiantan Hospital, Capital Medical University, Beijing, China.
Cognitive impairment in focal cerebellar disorders has been widely recognized and is described as cerebellar cognitive affective syndrome (CCAS). However, the relationship between CCAS and crossed cerebello-cerebral diaschisis (CCD) has rarely been discussed. The present report describes the uncommon phenomenon of CCD in two cases with isolated cerebellar infarction, and discuss its contribution to cognitive impairment.
View Article and Find Full Text PDFRethinking Remapping: Circuit Mechanisms of Recovery after Stroke.
J Neurosci
November 2023
Department of Neurology, David Geffen School of Medicine, University of California-Los Angeles, Los Angeles, California 90095
Stroke is one of the most common causes of disability, and there are few treatments that can improve recovery after stroke. Therapeutic development has been hindered because of a lack of understanding of precisely how neural circuits are affected by stroke, and how these circuits change to mediate recovery. Indeed, some of the hypotheses for how the CNS changes to mediate recovery, including remapping, redundancy, and diaschisis, date to more than a century ago.
View Article and Find Full Text PDFEffects of brain atrophy and altered functional connectivity on poststroke cognitive impairment.
Brain Res
January 2024
Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China; China National Clinical Research Center for Neurological Diseases, Beijing, China; Chinese Institute for Brain Research, Beijing, China; Research Unit of Artificial Intelligence in Cerebrovascular Disease, Chinese Academy of Medical Sciences, Beijing, China. Electronic address:
Background And Purpose: Brain atrophy and disrupted functional connectivity are often present in patients with poststroke cognitive impairment (PSCI). This study aimed to explore the relationship between remote brain atrophy, connectional diaschisis and cognitive impairment in ischemic stroke patients to provide valuable information about the mechanisms underlying cognitive function recovery.
Methods: Forty first-time stroke patients with basal ganglia infarcts and twenty-nine age-matched healthy people were enrolled.
The cerebellum and cognitive neural networks.
Front Hum Neurosci
July 2023
Department of Neurology, Kailuan General Hospital, North China University of Technology, Tangshan, Hebei, China.
Cognitive function represents a complex neurophysiological capacity of the human brain, encompassing a higher level of neural processing and integration. It is widely acknowledged that the cerebrum plays a commanding role in the regulation of cognitive functions. However, the specific role of the cerebellum in cognitive processes has become a subject of considerable scholarly intrigue.
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