Final answer:
The frontal and parietal lobes of the brain are crucial for various cognitive and sensory functions, including movement planning, reasoning, sensory processing, and language.
Step-by-step explanation:
The frontal and parietal portions of the brain are significant regions that comprise the human cerebral cortex. The frontal lobe is located at the front of the brain, above the eyes, and is responsible for critical functions such as reasoning, motor control, emotion, and language. This includes areas like the motor cortex for movement planning, the prefrontal cortex for cognitive functioning, and Broca's area for language production. The parietal lobe, situated at the top of the brain, handles vital sensory information like touch (somatosensation) and body positioning (proprioception). It contains a somatosensory map and is also involved in language and reading processes.