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Aphasia can also sometimes be caused by damage to subcortical structures deep within the left hemisphere, including the thalamus, the internal and external capsules, and the caudate nucleus of the basal ganglia. [44] [45] The area and extent of brain damage or atrophy will determine the type of aphasia and its symptoms.
The damage leaves the major language networks, Broca's and Wernicke’s areas and the arcuate fasiculus, unaffected. [1] Brain injury can result from a stroke caused by left anterior cerebral artery (ACA) occlusion, [6] brain tumors, traumatic brain injury (TBI), or progressive neurological disorders. [8]
Hemispatial neglect is a neuropsychological condition in which, after damage to one hemisphere of the brain (e.g. after a stroke), a deficit in attention and awareness towards the side of space opposite brain damage (contralesional space) is observed.
Callosal syndrome, or split-brain, is an example of a disconnection syndrome from damage to the corpus callosum between the two hemispheres of the brain. Disconnection syndrome can also lead to aphasia , left-sided apraxia , and tactile aphasia, among other symptoms.
Apraxia is a motor disorder caused by damage to the brain (specifically the posterior parietal cortex or corpus callosum [1]), which causes difficulty with motor planning to perform tasks or movements. The nature of the damage determines the disorder's severity, and the absence of sensory loss or paralysis helps to explain the level of ...
The stroke for this disorder occurs in the right hemisphere of the brain. Other etiologies that cause right hemisphere damage include: trauma (traumatic brain injury), disease, seizures disorders, and infections. Depending on the etiology that causes the right hemisphere damage, different deficits can be accounted for. [20] "The level of ...
Gerstmann syndrome is a neurological disorder that is characterized by a constellation of symptoms [1] that suggests the presence of a lesion usually near the junction of the temporal and parietal lobes at or near the angular gyrus. Gerstmann syndrome is typically associated with damage to the inferior parietal lobule of the dominant hemisphere ...
Numerous studies have shown that the right hemisphere can contribute to reading when a patient's left hemisphere is damaged. [4] [14] Brain imaging studies, performed both on deep dyslexics and in other patients with left hemisphere injury, have shown that the damaged left hemisphere is still playing a role in reading.