Intraparietal sulcus

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  • Gender And Handedness

    assigned blocks of seventy-two trials using their choice of hand. The primary variable measured throughout this experiment was the usage of the right or left hand during the reaches performed in each trial. Dependent on the trial, transcranial magnetic stimulation was either administered or not administered. The presence of stimulation was used to manipulate hand selection during the target reach movements within trials. When administered, the stimulation was applied to the right or the left posterior parietal cortex cerebral hemisphere. Anatomical magnetic resonance imaging (MRI) was used to locate the target stimulation regions of the hemispheres and stereotactic localization systems were used to locate the caudal portion of the intraparietal sulcus, an area continuously active during the process of planning and possible hand-selection. During the trials that administered transcranial magnetic stimulation, stimulations were applied one hundred milliseconds after the target onset with the intensity set to one hundred and twenty percent of the resting threshold value. After the participants finished the twelve blocks of trials, hand movements for each mode of transcranial magnetic stimulation were analyzed and probabilities were calculated to assess whether the stimulation correlated with the hand choice. The researchers of this study discovered that in experiment one, reaction times were longer in the third condition (choice of hand) as opposed to reaction times in the…

    Words: 1213 - Pages: 5
  • Visual Synesthesia Case Study

    stimulation (TMS) and functional magnetic resonance imaging (fMRI) studies have revealed the brain regions specific to synesthesia include the visual area 4 (V4), anterior lingual gyrus, intraparietal sulcus, and the parietal cortex. V4 is an area in the brain located within the color center. Though its exact mechanisms, locality, and purpose are still unclear, cross-activation observation studies have shown that the brain’s visual word-forming region is adjacent to V4. With this in mind,…

    Words: 1132 - Pages: 5
  • Action Observation

    dancers were blurred in order to emphasize body movement. Furthermore, in order to test the assumption that differences in brain activation were due to expertise levels alone, two non-expert control groups were tested to see if they experienced similar activity levels while watching both styles of dance. If they both experienced similar activity levels then it could be concluded that any differences in action observation activity were due to differences in the expertise levels of the two…

    Words: 1437 - Pages: 6
  • Memory Performance Review Essay

    recalls information across a significantly long interval. The journal’s authors state that grapheme colour related synesthesia is the association of colours that are consistent and memorable with letters and numbers. They produced two hypotheses for the experiment, one being that specific cues are used to improve memory recall for synesthetes and they also trigger their synesthesia. The second hypothesis was referred to as the alternative structural organization (ASO) hypothesis in which…

    Words: 1103 - Pages: 5
  • Semantic Memory Vs Structural Memory Essay

    The intraparietal sulcus a part of the brain is highly involved in visual memory has been found to play a large role in the manner visual information is perceived in the mind. This is because it has been greatly found to influence the reduction of the capacity of the short-term visual memory to perceive the information that has been encoded to it. As well as the dorsal stream pathway of the brain has profound explanations as it actually influences the memory to be in a position to aid in…

    Words: 1394 - Pages: 6
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