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The CNS has sensory neurons to convey impulses toward the brain and spinal cord, motor neurons to send messages to effectors, and neurons to connect the two.

By the middle of the fourth week after conception, three distinct swellings are evident on the anterior end of the neural tube: the prosencephalon, the mesencephalon, and the .

During embryonic development, the neural will become the central nervous system.

The matter, consisting of the neuron cell bodies and dendrites found in the surface layer of the cerebral cortex and deeper within the brain in clusters called nuclei, do not have myelin for coloration.

The largest portion of the brain is the .

The (two words) is a large fiber tract that connects the left and right cerebral hemispheres.

The precentral gyrus is located in the lobe of the cerebrum, while the postcentral gyrus is located in the lobe.

Sensations arising from cutaneous, muscle, tendon and joint receptors are known as sensations that will be conveyed to the postcentral gyrus of the cerebrum for interpretation.

The occipital lobe of the cerebrum contains important centers while the temporal lobe of the cerebrum contains important centers.

The waves recorded on an EEG are common during sleep and in an awake infant.

The corpus striatum, the caudate nucleus, and the lentiform nucleus collectively form the gray matter masses known as the nuclei, that were formerly called the ganglia.

The term refers to the crossing over of nerve fibers from one side of the body or brain to the other.

The gyrus is thought to be the center that integrates visual, somatesthetic and auditory information.

refers to speech and language disorders caused by damage to the brain through head injury and stroke.

Individuals whose speech is described as a "word salad" of rapid, fluid words with no meaning, probably are suffering from aphasia.

A fiber tract called the fasciculus connects Wernicke's area, where words to be spoken originate to Broca's area where control of the muscles of speech to vocalize the words is located.

The cingulate gyrus, amygdaloid nucleus (amygdala), hippocampus, and the septal nuclei, are all important structures that make up the system that forms a ring around the brain stem.

From surgical experience and clinical studies it appears that the is a critical component of the memory storage and retrieval system.

The diencephalon is a part of the forebrain that contains such important structures as the thalamus, hypothalamus, and gland.

During the formation of memories the postsynaptic neuron undergoes a morphological change and produces structures known as (two words).

The thalamus acts primarily as a relay center through which all sensory information except the sense of passes on the way to the cerebrum for interpretation.

That portion of the brain containing the neural centers for hunger, thirst, the regulation of body temperature, and the secretion of hormones, is the .

Interestingly, the posterior pituitary secretes two hormones that are actually synthesized and packaged by the hypothalamus. These two hormones are antidiuretic hormone (ADH) and .

The hypothalamo-hypophyseal tract of axons connect the hypothalamus to the (2 words).

The discovery of (three words) indicates that mitosis may occur in the central nervous system to increase the number of nerve cells in the hippocampus during learning and memory.

The superior and inferior colliculi are four paired structures that comprise a larger structure of the mesencephalon, or midbrain, known as the corpora .

The superior colliculi are involved in reflexes, the inferior colliculi are relay centers for information.

The two respiratory control centers in the pons are the center and the center.

The (2 words) of the brain houses vital centers and features elevated, triangular pyramids formed by underlying neuron fibers crossing over to the other side of the body.

The activating system (RAS) is a complex network of nuclei and nerve fibers in the lower portion of the brain that serves to interconnect incoming sensory information and to project impulses to the cerebral cortex, resulting in nonspecific arousal.

Clinically, reflex is used to detect possible damage to the pyramidal motor pathway.

Most cranial nerves are classified functionally as nerves.

Each spinal nerve has two "roots" - one root composed of sensory nerve fibers, and one root composed of motor fibers.

A spinal reflex arc response to sensory stimulation requires receptors, sensory neurons, motor neurons, and perhaps, association neurons - however, the is not directly involved.

Amphetamines stimulate the release of .

Alcohol has an effect on the nervous system by the function of the NMDA receptors.

The ventricle cavities and the spinal canal are filled with (no abbreviation) fluid.

The names of the ascending tracts of the spinal cord usually start with the prefix ; whereas the descending tracts usually end in the suffix- .

In humans, there are pairs of cranial nerves and of spinal nerves.

(not abbreviated) imaging measures emission of single photons and can map areas of increased neuronal activity.

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