The three main parts of the brain are the cerebellum, cerebrum, and brainstem. The cerebrum, which is the largest part of the brain, is made up of the left and right hemispheres. It performs higher order cognitive functions including speaking, feeling, thinking, and learning.
Anatomically, the precentral gyrus houses the primary motor cortex, which controls free will movement. The temporal lobe, which is found behind the ears, is the second-largest lobe. The internal occipital lobe is separated from the parietal and internal temporal lobes by the parieto-occipital sulcus, a very deep sulcus that runs through the posterior region of the hemisphere.
The insula plays a crucial role in the processing of gustatory and sensorimotor information, risk-reward behavior, autonomic nervous system function, pain pathways, and auditory and vestibular functions.
The main somatosensory cortex, a prominent brain area in charge of proprioception, is located in the postcentral gyrus. On the lateral and medial surfaces of the cerebral hemispheres, the central sulcus serves as the dividing line between the frontal and parietal lobes.
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