The frontal lobe is the largest lobe, located behind your forehead. It is separated from the parietal lobe by the central sulcus.
This lobe is mainly responsible for motor functions. The premotor cortex is associated with planning voluntary movements, while the primary motor cortex is involved in initiating these motor movements.
The prefrontal cortex is responsible for planning, judgment, decision making, memory, and maybe personality. The frontal lobe also contains Broca’s area. This area is associated with speech production, so if this area is damaged that patient will suffer from Broca’s aphasia or expressive aphasia, meaning they won’t be able to create fluent speech.
Figure 1: The frontal lobe