Medical illustration of the cerebral cortex, showing gyri and sulci, lateral and medial views. Labeled features include the preoccipital notch and the cingulate, lateral, central, parieto-occipital, and calcarine sulci.

Medical illustration of the cerebral cortex, showing gyri and sulci, lateral and medial views. Structures shown include the preoccipital notch and the cingulate, lateral, central, parieto-occipital, and calcarine sulci.

Medical illustration showing the steps in the prolapse of the nucleus of an intervertebral disk. A normal disk is depicted (A) followed by several views showing progressive degrees of prolapse (B-E).

Medical illustration of the tegmentum, which consists of white fibers running lengthwise through gray matter from the substantia nigra to the level of the cerebral aqueduct. Labels identify the midbrain, tegmentum, pons, medulla, and spinal cord.

Medical illustration of the tegmentum, which consists of white fibers running lengthwise through gray matter from the substantia nigra to the level of the cerebral aqueduct. Structures shown include the midbrain, tegmentum, pons, medulla, and spinal cord.

Medical illustration of the trigeminal system, showing the brain stem, dorsal view, and cerebrum, coronal view. Labeled structures include the spinal trigeminal nucleus, main sensory nucleus, trigeminal ganglion, and spinal trigeminal tract.

Medical illustration of the trigeminal system, showing the brain stem, dorsal view, and cerebrum, coronal view. Structures shown include the spinal trigeminal nucleus, main sensory nucleus, trigeminal ganglion, and spinal trigeminal tract.

Medical illustration showing the subdivisions of the lateral ventricle, lateral view. Labeled structures include the anterior horn, posterior horn, inferior horn, collateral trigone (and atrium), and interventricular foramen.

Medical illustration showing the subdivisions of the lateral ventricle, lateral view. Labeled structures include the anterior horn, posterior horn, inferior horn, collateral trigone (and atrium), and interventricular foramen.

Medical illustration of the cerebral hemispheres, dissected, frontal view, with components of white matter labeled (capsule, peduncle, and pyramid).

Medical illustration of the cerebral hemispheres, dissected, frontal view, showing components of white matter (capsule, peduncle, and pyramid).

Medical illustration of the posterior (dorsal) surface of the brain stem, showing the thalamus, cerebellum, pineal body, midbrain, cerebellar peduncles, and medulla oblongata.

Medical illustration of the anterior (ventral) surface of the brain stem, showing structures including the pons, midbrain, olive, and pyramid.

Medical illustration depicting the circulation pathways of cerebrospinal fluid (CSF) around the brain, medial view with cutaway.

Illustration of the location and structural details of gray and white matter in the central nervous system, shown in the brain, coronal section (center), and spinal cord, transverse section (below). Photomicrograph (gray matter) and EM (white matter) sections detail structures, including neurons, capillaries, neuroglia, neuropil, and myelinated axons.

Illustration of the location and structural details of gray and white matter in the central nervous system, shown in the brain, coronal section (center), and spinal cord, transverse section (below). Photomicrograph (gray matter, left) and EM (white matter) sections detail structures, including neurons, capillaries, neuroglia, neuropil, and myelinated axons.

Medical illustration of the central nervous system, showing the major anatomical regions of the brain and spinal cord, lateral view. Labeled structures include the cerebrum, diencephalon, cerebellum, brain stem, and spinal cord.

Medical illustration of the central nervous system, showing the major anatomical regions of the brain and spinal cord, lateral view. Structures shown include the cerebrum, diencephalon, cerebellum, brain stem, and spinal cord.

Medical illustration of the neural basis of cognition, with labels identifying the structures involved in cognition (the cerebral cortex, midbrain, pons, medulla, and cervical spinal cord). The primary sensory cortex is concerned with higher perceptual functions related to somatic sensations.

Medical illustration of the neural basis of cognition, showing the structures involved in cognition (the cerebral cortex, midbrain, pons, medulla, and cervical spinal cord). The primary sensory cortex is concerned with higher perceptual functions related to somatic sensations.