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The Human Body's Nervous System Essay

766 words - 4 pages

* What is the job of the central nervous system (CNS)? The central nervous system, also known as the CNS, consists of three(3) major components of the human body:
* Brain – the brain is made up of three(3) parts: the cerebrum, the diencephalon, and the hindbrain.
* Nerve Tissue – this part of the CNS is comprised of neurons, synapses, and neurotransmitters.
* Spinal Cord – protected by vertebrae in the back, the spinal cord is made up of fiber tracts and spinal nerves.
(Pedersen DD; PsychNotes: Clinical Pocket Guide, 3rd ed, F.A. Davis Company, 2011, Ch. 9, pg. 1)
One of the two major divisions of the human body’s nervous system, the central nervous system is ...view middle of the document...

This is caused by cold material, or stimulants, ingested by mouth. It is said that “the pain is referred from one’s mouth to their head via the trigeminal nerve, delivering sensory information from the face and mouth to the brain” (http://www.mayoclinic.com/health/ice-cream-headaches/DS00640/DSECTION=causes). The symptoms that one might experience during an ice cream headache are sharp, stabbing pains in the forehead or tooth, and short spasms of pain (usually 0-5 minutes or so) that peak at around 30-60 seconds after it begins. The reason for the delay in the pain is because the nerves relay the disruption to the CNR, where the electronic impulses are registered as pain. Although this is a slightly painful experience to encounter, due to its short-term lifecycle, it causes no trauma and requires no doctor visit.
* How does information travel from the brain to the fingers? According to Encyclopedia.com, “information flows to the central nervous system from the peripheral nervous system, sending sensory information about the body’s internal and external environments via nerves that pass through the spinal cord to the brain.” As the principle route for the body’s sensory information, the information travels to the brain, where it is “analyzed” and “processed” by the brain. The brain then produces responses to this incoming flow of...

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