Intraparietal sulcus
[3] Its principal functions are related to perceptual-motor coordination (e.g., directing eye movements and reaching) and visual attention, which allows for visually-guided pointing, grasping, and object manipulation that can produce a desired effect.The intraparietal sulcus (IPS) plays a pivotal role in multisensory integration, particularly in linking visual and tactile information to guide complex motor actions.[4] The IPS is also thought to play a role in other functions, including processing symbolic numerical information,[5] visuospatial working memory,[6] decision-making,[7] and interpreting the intent of others.Researchers discovered that disrupted activity in the right intraparietal lobe using rTMS, (repetitive transcranial magnetic stimulation) resulted in participants having difficulties with performance in both the magnitude and length tasks.Studies have shown that children who show a larger change in brain activity in the left intraparietal sulcus tend to perform better at arithmetic tasks.