Posterior Parietal Cortex Case Study

Leslie

Posterior Parietal Cortex "The posterior lobe forms about 20% of the human cerebral cortex and is divided into two major regions, the somatosenory cortex, and the posterior parietal cortex. The posterior parietal cortex which is located at the junction of multiple sensor regions, projects to several cortical and subcortical areas and is engaged in a host of cognitive operations" (Behrmann, Geng, Shomstein) The posterior parietal cortex has most commonly been associated with visuo-spatial perception and spatial attention. However, evidence has involved it in a much wider range of cognitive functions. (Constantindis, Bucci, Rugg) A region of the brain has been identified by human subjects that is believed to be useful in the calibration between visual and motor systems for accurate eye-hand coordination. This region is located in a specialized area of the posterior parietal cortex in the hemisphere opposite the reaching hand. (Preston) Using functional neuroimaging techniques, studies have shown cognitive

Using visual activity or discrimination results in better accuracy for the shooter. The dominant eye certainly has an advantage in any activity in which monocular coordination and vision is required. (Armstrong) Although the brain is very complex it is also a simple organ. It can process visual information simultaneously or can disregard information completely from one eye. The brain, during suppression, "decides" to process one eye while the other in essence "shuts down". (Armstrong) "One of the most important goals of sensory progressing is to guide action. For example, the execution of a goal-directed movement such as grasping or pointing requires the subject to determine the location, size, and shape of the target object through sensory processing." (Hong, Xu, Kang,