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The most common symptom of inferior temporal lobe damage is visual agnosia, which involves impairment in the identification of familiar objects. Another less common type of inferior temporal lobe damage is prosopagnosia which is an impairment in the recognition of faces and distinction of unique individual facial features. [20]
Damage to the inferior left temporal lobe, which is shown in green, is associated with TSA. Transcortical sensory aphasia is caused by lesions in the inferior left temporal lobe of the brain located near Wernicke's area, and is usually due to minor hemorrhage or contusion in the temporal lobe, or infarcts of the left posterior cerebral artery (PCA). [4]
Cortical deafness is caused by bilateral cortical lesions in the primary auditory cortex located in the temporal lobes of the brain. [3] The ascending auditory pathways are damaged, causing a loss of perception of sound. Inner ear functions, however, remains intact.
While cortical blindness results from lesions to primary visual cortex, visual agnosia is often due to damage to more anterior cortex such as the posterior occipital and/or temporal lobe(s) in the brain. [2] There are two types of visual agnosia, apperceptive and associative. Recognition of visual objects occurs at two levels. At an ...
A lesion in the temporal lobe that results in damage to Meyer's loop causes a characteristic loss of vision in a superior quadrant (quadrantanopia or "pie in the sky" defect.) Fibers from the superior retina* travel straight back through the parietal lobe to the occipital lobe in the retrolenticular limb of the internal capsule to the visual ...
Cases have been documented that result from severe acute head trauma resulting in bilateral temporal lobe damage. [4] Auditory information enters both hemispheres, so auditory agnosia usually develops from bitemporal damage or lesions. [1] In contrast, auditory verbal agnosia has also been documented to present progressively over several years.
It is traditionally thought to reside in Brodmann area 22, located in the superior temporal gyrus in the dominant cerebral hemisphere, which is the left hemisphere in about 95% of right-handed individuals and 70% of left-handed individuals. [1] Damage caused to Wernicke's area results in receptive, fluent aphasia. This means that the person ...
Hippocampal sclerosis specific to the mesial temporal lobe, is the most common type of such tissue damage. [ 154 ] [ 155 ] It is not yet clear, however, whether the epilepsy is usually caused by hippocampal abnormalities or whether the hippocampus is damaged by cumulative effects of seizures. [ 156 ]