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In the two-streams hypothesis, damage to the ventral, or "what" stream, of the visual system, located in the temporal lobe, leads to the symptoms related to general vision and object recognition deficits; damage to the dorsal, or "where/how" stream, located in the parietal lobe, leads to PCA symptoms related to impaired movements in response to ...
The visual cortex located in the occipital lobe of the brain is that part of the cerebral cortex which processes visual information. [26] Cortical blindness refers to any partial or complete visual deficit that is caused by damage to the visual cortex in the occipital lobe. Unilateral lesions can lead to homonymous hemianopias and scotomas.
Increased alcohol intake is associated with damage to brain regions including the frontal lobe, [3] limbic system, and cerebellum, [4] with widespread cerebral atrophy, or brain shrinkage caused by neuron degeneration. This damage can be seen on neuroimaging scans. [5]
Animation. Parietal lobe (red) of left cerebral hemisphere. The parietal lobe is defined by three anatomical boundaries: The central sulcus separates the parietal lobe from the frontal lobe; the parieto-occipital sulcus separates the parietal and occipital lobes; the lateral sulcus (sylvian fissure) is the most lateral boundary, separating it from the temporal lobe; and the longitudinal ...
To be specific, MRI of CBD typically shows posterior parietal and frontal cortical atrophy with unequal representation in corresponding sides. In addition, atrophy has been noted in the corpus callosum. [24] Functional MRI (fMRI) has been used to evaluate the activation patterns in various regions of the brain of individuals affected with CBD.
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 ...
Generalized atrophy occurs across the entire brain whereas focal atrophy affects cells in a specific location. [2] If the cerebral hemispheres (the two lobes of the brain that form the cerebrum ) are affected, conscious thought and voluntary processes may be impaired.
Illustration showing the position of the parietal lobe of the brain, the site of damage related to visual extinction. Visual extinction is a neurological disorder which occurs following damage to the parietal lobe of the brain. It is similar to, but distinct from, hemispatial neglect. Visual extinction has the characteristic symptom of ...