Chapter 12 nervous system


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Chapter 12 nervous system

  1. 1. CHAPTER 12:NERVOUS SYSTEMMarcos Herbas
  2. 2. Exercise 12H: Suffixes- Phasia - Plegia
  3. 3. - PhasiaDefinition:a combining form used in the names of speech disorders, as specified by the initial element (prefix)
  4. 4. - PhasiaOrigin:Greek, combining form akin to phánai to speak
  5. 5. - PhasiaExamples containing this suffix: Aphasia – lack of speech Dysphasia – difficult speech Acataphasia - a physical disorder in which a lesion to the central nervous system leaves a person unable to correctly formulate a statement or to express oneself in an organized manner.
  6. 6. - PhasiaExamples containing this suffix: Agitophasia - abnormally rapid speech in which words are imperfectly spoken or dropped out of a sentence; also agitolalia. Allophasia - Incoherent speech
  7. 7. - PhasiaExample of its use in Nervous System:This suffix is used to describe conditions affecting speech. The root cause of may differ from case to case, for most people however, these are areas on the left hemisphere of the brain.-phasia usually occurs suddenly, often as the result of a stroke or head injury, but it may also develop slowly, as in the case of a brain tumor, an infection, or dementia. The disorder impairs the expression and understanding of language as well as reading and writing.
  8. 8. - PhasiaExample of its use in Nervous System:Temporal Lobe damage – may result in fluent aphasia, also known as Wernicke’s aphasia.Frontal Lobe damage – results in non-fluent aphasia, also known as Broca’s aphasiaGlobal aphasia - results from damage to extensive portions of the language areas of the brain.
  9. 9. - PlegiaDefinition:a combining form meaning paralysis, cessation of motion, in the limbs or region of the body specified by the initial element (prefix)
  10. 10. - PlegiaOrigin:Greek - plēgia, combining form representing plēgḗ bl ow, stroke
  11. 11. - PlegiaExamples containing this suffix: Monoplegia – paralysis of one limb Cycloplegia – paralysis of the ciliary muscle of the eye Diplegia – affecting the same body region on both sides of the body (i.e. both sides of the face or both arms) Quadriplegia – paralysis of four limbs Paraplegic – affecting both legs and the trunk
  12. 12. - PlegiaExample of its use in Nervous System:The chain of nerve cells that runs from the brain through the spinal cord out to the muscle is called the motor pathway.When this pathway is damaged at any point, it causes a reduction in the brains ability to control the muscles’ movements.Complete loss of communication results in a complete loss of control  Paralysys
  13. 13. - PlegiaExample of its use in Nervous System:Some common causes for nerve damage in the brain are: stroke tumor trauma (caused by a fall or a blow) Multiple sclerosis cerebral palsy - defect or injury to the brain that occurs at or shortly after birth metabolic disorder - interferes with the bodys ability to maintain itself
  14. 14. - PlegiaExample of its use in Nervous System:Some common causes for nerve damage in the spine are: tumor herniated disk (also called a ruptured or slipped disk) spondylosis (a disease that causes stiffness in the joints of the spine) rheumatoid arthritis of the spine