Dr Gawad Physiology Course Online Exams – Descending Tracts

7 Questions | Total Attempts: 376

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Dr Gawad Physiology Course Online Exams – Descending Tracts

7 MCQs (Only one correct answer)Each MCQ: 1 mark, Total mark: 7 (you will get the results immediately with correction by the web)Allowed time: 8 minGood Luck


Questions and Answers
  • 1. 
    The cranial motor nuclei which receive innervation only from the contralateral corticobular tract are:
    • A. 

      Trigeminal & vagus

    • B. 

      Vagus & glossopharyngeal

    • C. 

      Facial and hypoglossal

    • D. 

      Facial and glossopharyngeal

  • 2. 
    Lesion of lateral column will lead to the following motor deficit:
    • A. 

      Paralysis of fine movement muscles on the same side of the lesion

    • B. 

      Paralysis of respiratory muscles on ipsilateral side

    • C. 

      Paralaysis of hypoglossal nreve supplied muscles on the opposite side

    • D. 

      None of the above

  • 3. 
    Regarding the difference between pyramidal and extrapyramidal tracts, which is true:
    • A. 

      Pyramidal pathway from the cortex to the spinal cord involves multiple neurons and synapses than extrapyramidal

    • B. 

      Only some of pyramidal fibers cross to opposite side

    • C. 

      Pyramidal functions later on in life

    • D. 

      None of the above

  • 4. 
    Functions of the Extrapyramidal system include all of the following except:
    • A. 

      Control of muscle tone

    • B. 

      Swinging of the arms during walking

    • C. 

      Posture and equilibrium

    • D. 

      Type writing

  • 5. 
    Stroke of precentral gyrus will cause:
    • A. 

      Loss of equilibrium

    • B. 

      Loss of fine movements

    • C. 

      Loss of muscle tone

    • D. 

      Loss of swinging of arms

  • 6. 
    Primary motor area (area 4) characterized by all of the following except:
    • A. 

      The body is represented in an inverted manner

    • B. 

      Cortical representation of any part of the body in area 4 is directly proportional to its size

    • C. 

      It is an area of high excitability

    • D. 

      It facilitates the spinal reflexes as, stretch reflex

  • 7. 
    Premotor area 6, which is false:
    • A. 

      It is of low excitability

    • B. 

      Initiates gross movements on the contralateral limbs

    • C. 

      Nvolved in the selection of appropriate motor plans for voluntary movements.

    • D. 

      Shares together with the cerebellum in initiation of automatic associated involuntary movements

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