一致的白质病变与慢性布罗卡失语症的网络水平结构和功能断开有关
Yuki Kumagae1, Atsushi Yamaguchi1
1Department of Functional Anatomy, Graduate School of Medicine, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8670, Japan.
Neuroscience
|February 11, 2026
概括
布罗卡的失语症与特定的白质病变有关,而不仅仅是皮质损伤. 这种焦点损伤导致广泛的结构和功能断开,影响语言网络.
科学领域:
- 神经科学是一个神经科学.
- 神经学 神经学
- 神经成像是一种神经成像.
背景情况:
- 布罗卡的失语症传统上与布罗卡区域的皮质损伤有关.
- 新出现的证据表明,在失言症中,更广泛的网络水平功能障碍.
研究的目的:
- 在布罗卡的失言症中调查一个一致的白质病变.
- 将结构性断网 (SDC) 与功能网络中断和严重程度相关联.
主要方法:
- 在58名患有慢性布罗卡失语症的患者中进行多模态MRI分析.
- 基于Voxel的病变重叠映射 (VLOM) 和病变症状映射 (VLSM).
- 扩散轨道图和网络建模.
主要成果:
- 在90%的患者中发现左侧中央下面的焦点白质病变.
- 这种损伤将布罗卡的失言症与其他类型区分开来 (OR=149.2,p<0.001).
- SDC与广泛的功能失联和语言障碍相关 (r>0.4,p<0.05).
结论:
- 布罗卡的失言症源于一个一致的焦点白质病变.
- 这种损伤导致分布式结构和功能断开.
- 病理扩展到布罗卡区域之外,影响大规模的大脑网络.
更多相关视频
相关概念视频
01:10Higher Mental Functions of the Brain: Language
Language is a system of communication that allows the expression of thoughts, ideas, and feelings. The brain processes language in both hemispheres.
Language formation and comprehension take place in the dominant hemisphere. The dominant hemisphere is responsible for understanding the meaning of spoken, written, or sign language, as well as the ability to communicate. For most people, the left hemisphere is the dominant one. The right hemisphere, then, gives tone and emotional context to the...
Language formation and comprehension take place in the dominant hemisphere. The dominant hemisphere is responsible for understanding the meaning of spoken, written, or sign language, as well as the ability to communicate. For most people, the left hemisphere is the dominant one. The right hemisphere, then, gives tone and emotional context to the...
01:26Alzheimer's Disease: Overview
Alzheimer's Disease (AD) is a continually advancing neurodegenerative disorder, distinguished by escalating memory loss, cognitive dysfunction, and dementia. The disease unfolds in three stages: preclinical, mild cognitive impairment (MCI), and dementia. Its onset is insidious, and the progression gradual, with the cause not well explained by other disorders.
The clinical diagnosis of AD hinges on the presence of memory and other cognitive impairments. Biomarkers, such as changes in Aβ and tau...
The clinical diagnosis of AD hinges on the presence of memory and other cognitive impairments. Biomarkers, such as changes in Aβ and tau...
01:27Language and Cognition
Language serves as a bridge between ideas and communication, influencing how individuals perceive and interact with the world. Psychologists have long debated whether language shapes thought or vice versa. This discussion gained grip with Edward Sapir and Benjamin Lee Whorf in the 1940s, who proposed that language determines thought, a concept known as linguistic determinism. They suggested that the vocabulary and structure of a language influence how its speakers think and perceive reality.
01:15Ischemic Stroke ll: Pathophysiology
An ischemic stroke occurs when a cerebral blood vessel becomes obstructed, most often by a thrombus or embolus, interrupting the delivery of oxygen and glucose to brain tissue. Because neurons rely on continuous aerobic metabolism, energy failure begins within minutes of reduced perfusion. The region receiving the least blood flow becomes the infarct core, an area of irreversible cellular death. Surrounding this core lies the penumbra, a zone of hypoperfused but still viable tissue that is...
01:23Alzheimer Disease ll: Pathophysiology
Alzheimer disease involves structural changes in the brain that begin long before symptoms appear. The most distinctive features are extracellular neuritic plaques and intracellular neurofibrillary tangles.Neuritic plaques form in the cerebral cortex and around blood vessels. These plaques contain a dense core of beta-amyloid (Aβ)—a toxic protein fragment that clumps outside neurons. The core is surrounded by damaged neuronal extensions, as well as reactive astrocytes and microglia. Abnormal...
01:22Dementia l: Introduction
Dementia is an acquired, progressive syndrome characterized by a decline in multiple cognitive domains severe enough to impair daily functioning and reduce independence. Although memory loss is a central feature, the diagnosis requires additional deficits involving language, executive function, visuospatial skills, judgment, calculation, or abstract reasoning. These cognitive impairments reflect underlying neurodegenerative or vascular processes that gradually disrupt neuronal networks...