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Spinal Cord Tracts and Lesions

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10 questions
Show answers
  • Q1
    Which of the following is true regarding myotatic reflexes?
    Stretch in a muscle causes a reflex contraction of the opposing muscle group
    Opposing muscle groups contract in the same time, causing the muscle spindle organ to initiate a quick relaxation of the antagonist muscle group.
    Muscle spindle output causes a reflex contraction of the same muscle that is lengthened.
    Nociceptive input results in a quick withdrawal from the stimulus.
  • Q2
    What section of the spinal cord contains ascending axons that send afferent neurons from cutaneous mechanoreceptors and proprioceptors?
    Posterior Funiculus
    Lateral Funiculus
    Ventral horn
    Intermediolateral cell column
  • Q3
    In which part of the dorsal column-medial lemniscal system pathway do the neurons crossover to the contralateral side of the spinal cord?
    Medial Lemniscus
    Internal Arcuate
    Posterior Limb of Internal Capsule
    Ventral Posterolateral Nucleus
  • Q4
    Which sensory spinal tract is responsible for crude touch, pain, and temperature?
    Anterolateral System
    Spinocerebellar tract
    Dorsal column-medial lemniscal system
    Corticospinal tract
  • Q5
    Which of the following is the correct descending order of the lateral corticospinal tract?
    Lateral Funiculus -- Basis Pontis -- Pyramids -- Crus Cerebri -- Corona radiate
    Internal capsule -- crus cerebri -- Corona radiate -- Pyramids -- Lateral Funiculus
    Corona radiate -- Internal capsule -- Crus Cerebri -- Basis Pontis -- Pyramids
    Internal capsule -- Basis Pontis -- Crus Cerebri -- Corona Radiate -- Lateral Funiculus
  • Q6
    The ___________ tract is primarily responsible for flexor activity in the arms and forearms while the _________________ and _____________ tracts primarily control extensor muscles.
    Anterior Corticospinal; rubrospinal; reticulospinal
    Rubrospinal; reticulospinal; vestibulospinal
    Reticulospinal; vestibulospinal; rubrospinal
    Reticulospinal; spinothalamic; rubrospinal
  • Q7
    Which of the following is not true of vestibulospinal tracts?
    Arise in the brainstem
    Primarily excitatory to flexor musculature of the extremities.
    Act to maintain upright body posture and orientation in space
    Neurons are connected to the vestibular apparatus of the inner ear
  • Q8
    An upper motor neuron lesion may result in the Babinski Sign.
  • Q9
    Tommy has a lesion beginning at the central canal, all of the following may occur except:
    Blockage of the neurons that cross in the anterior white commissure
    It is a posterior cord syndrome
    Encroachment upon second order projection neurons
    Segmental loss of pain and temperature bilaterally
  • Q10
    All of the following are true about Brown-Sequard Syndrome except:
    Results in loss of pain and temperature on the opposite side of the lesion
    Involves damage to one half of the spinal cord
    Results in paralysis and loss of proprioception on the opposite side of the lesion
    Results in the loss of two-point discrimination on the ipsilateral side

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