The areas of the cortex are associated with groups of related functions.
(a) For example, centers of speech and hearing are located along the
lateral sulcus, at the side of each hemisphere.
Vision is centered at the rear in the area known as the occipital
(c) Sensory and motor functions are located along the central sulcus,
which separates the frontal and parental lobes of each hemisphere. The motor areas
are located along the front side of the central sulcus, in the frontal lobe. The sensory
areas are located along the rear side of the central sulcus in the parietal lobe.
d. Ventricles. Within the brain, there are interconnected hollow spaces filled
with cerebrospinal fluid (CSF). These hollow spaces are known as ventricles. The right
and left lateral ventricles are found in the cerebral hemispheres. The third ventricle is
located in the forebrainstem. The fourth ventricle is in the hindbrainstem. The fourth
ventricle is continuous with the narrow central canal of the spinal cord.
5-12. THE HUMAN SPINAL CORD
a. Location and Extent. Referring to Figure 5-6, you can see that the typical
vertebra has a large opening called the vertebral (or spinal) foramen. Together, these
foramina form the vertebral (spinal) canal for the entire vertebral column. The spinal
cord, located within the spinal canal, is continuous with the brainstem. The spinal cord
travels the length from the foramen magnum at the base of the skull to the junction of
the first and second lumbar vertebrae.
Figure 5-6. The spinal column.