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Parietal lobe lesion

            What are the consequences of a parietal lobe lesion in humans? To what extent do they illuminate our understanding of parietal lobe function?.
             As part of the central nervous system the parietal lobe is important for integrating different forms of information, especially those concerning the outside sensory world and various sensory modalities. Consequently lesions to this area have a profound and wide array of effects on behavior. As with much of the central nervous system the studies of the symptoms of people with gross lesions in the parietal lobe are especially important because they provide insight into lobe functioning. Since most animals do not rely as heavily on the parietal lobes and monkeys who have the most similarities in lobe structure and function are difficult to derive data from relating to spatial or language cognition, much of what we know about the parietal lobe is from or influenced by research concerning lesional affects. As the consequences of lobe lesions are influenced by the location of the lesion within the lobe, symptoms of parietal lobe lesions will be described in reference to these primary areas of anterior and posterior lobules with reference to hemispheres when significant.
             Damage to the anterior parietal regions is marked by deficits in the somatosensory process which is primarily concerned with tactile control. With this knowledge it can be deduced that the anterior parietal region integrates sensory information with motor movements and are associated with many other regions of the brain. Symptoms include abnormally high sensory thresholds, impaired sense of position, and a number of other deficits. One symptom is the deficit in the recognition of objects through touch, known as astereognosis. The symptom of simultaneous extinction is marked by failure to attend to more than one stimulus at a time. This disorder gives light to the importance of the parietal lobe in allowing us to distinguish and perceive stimuli in an environment where we are bombarded with multiple tactile stimulus at any given time.


Essays Related to Parietal lobe lesion

1. Complexity and Functionality of the Human Brain

These patients maintain the ability to understand written and spoken words because of a second area in the temporal lobe called Wernicke's area (Banich, 2011). ... Unaware of their meaningless speech, these aphasics show impaired comprehension of word meaning indicating that the damage lesion must include posterior regions (superior temporal lobe), as these regions are involved in interpreting sensory information, and in turn this information is translated into meaning through linkages across representations (Banich, 2011). Thus the lesion is characteristically situated in Brodmann'...

  • Word Count: 1699
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2. Alzheimer's disease

Early in the course of AD, damage occurs to the medical temporal lobe (MTL), leading to impairment in declarative memory, as well as the ability to learn new fact and events. The neuropathology becomes progressively widespread, involving particularly the association areas of the temporal, parietal, and frontal lobes (Reber, Martinez, & Weintraub, 2003). ... Autopsies of patients with Alzheimer's disease reveal both neurofibrillary tangles, which are twisted and distorted nerve fibers, and senile plaques or microscopic lesions in the neurons (Alloy, Jacobson, & Acocella, 1999.) ...

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3. Overview of Basic Bodily Functions

Localized lesions of the auditory association cortex can damage people's ability to recognize environmental sounds, sound location, and sound movement (Carlson & Carlson, 2012). ... Individuals who suffer from medial temporal lobe damage have a difficulty in remembering visual stimuli. ... Frontotemporal amnesia, Pick's disease, is caused by atrophy of the frontotemporal lobe. ... Frontal lobe motor area is responsible for planning movements. ... Most cases of apraxia are produced by lesions of the left frontal or parietal cortex. ...

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4. Affect of Stroke on Cognition, Behavior and Emotion

"Most frequently mentioned changes [ ], irrespective of side of lesion, were mental slowness, memory disabilities, less initiative and hyper-emotionality- (Visser-Keizer et al, 2002, p. 1032). ... Left-sided lesions are usually associated with memory deficits/dementia; but memories are stored in the inner part of the temporal lobe and, unless both the left and right lobes are damaged, memory loss after stroke is usually only temporary. ... Studies seem to show mixed results as to the hemispherical location that predominantly causes these episodes; but lesions on the left frontal or left basa...

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