Brain Structure - Brain Theory from a Circuits and Systems Perspective - page 3

Broca's Area
Broca's area is located in the lower back part of the left frontal lobe and is
associated with the production of spoken and written language. Paul Broca in
1861 discovered the importance of this region. Broca's aphasia is a disorder in
which a person can understand language but has difficulty in expressing it.
Motor Cortex
The motor cortex is a narrow band in the posterior part of the frontal lobes devoted to
the activation of body movements, a band going from ear to ear. The motor cortex
works backwards and upside down: The left side regulates muscles on the right side
of the body, and the right side regulates muscles on the left side of the body. The area
at the top regulates our feet, and the area at the bottom, that is, closest to our ears,
regulates facial expressions. Most of the volume of the motor cortex in humans is
devoted to the complex precise movements of the hands and face.
Parietal Lobes
The parietal lobes are in the upper back of the cerebral cortex, behind the ears, and
participate in recognition of danger and opportunity. They monitor touch sensations
and body positions.
Occipital Lobes
The occipital lobes monitor vision.
Temporal Lobes
The temporal lobes monitor sound.
Somatosensory Cortex
The somatosensory cortex is a narrow band just behind the motor cortex devoted to
touch sensations from the body. The left side receives sensations from the right side
of the body, and the right side receives sensations from the left side of the body.
Again we are represented upside down with the top of the brain receiving sensations