The parietal lobe plays a critical role in processing sensory information, spatial awareness, and navigation. If someone were to lose the parietal lobe due to injury or surgery, the effects would be significant.
People can survive without the parietal lobe, but they would face severe challenges. The most common issues would include difficulty with proprioception (knowing where your body is in space), problems with sensory perception, and difficulties with tasks that require spatial reasoning, such as navigating environments.
Additionally, individuals might experience symptoms of apraxia, which involves problems with the planning and execution of movements, even though they have the physical ability to perform the movements. These challenges can affect daily life, making it necessary for individuals to adapt and find new ways to accomplish tasks.
Overall, while living without the parietal lobe is possible, it would require significant adjustments and support, and the quality of life could be greatly impacted.