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Spinal Cord Tracts and Lesions
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10 questions
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- Q1Which of the following is true regarding myotatic reflexes?Stretch in a muscle causes a reflex contraction of the opposing muscle groupOpposing 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.30s
- Q2What section of the spinal cord contains ascending axons that send afferent neurons from cutaneous mechanoreceptors and proprioceptors?Posterior FuniculusLateral FuniculusVentral hornIntermediolateral cell column30s
- Q3In which part of the dorsal column-medial lemniscal system pathway do the neurons crossover to the contralateral side of the spinal cord?Medial LemniscusInternal ArcuatePosterior Limb of Internal CapsuleVentral Posterolateral Nucleus30s
- Q4Which sensory spinal tract is responsible for crude touch, pain, and temperature?Anterolateral SystemSpinocerebellar tractDorsal column-medial lemniscal systemCorticospinal tract30s
- Q5Which of the following is the correct descending order of the lateral corticospinal tract?Lateral Funiculus -- Basis Pontis -- Pyramids -- Crus Cerebri -- Corona radiateInternal capsule -- crus cerebri -- Corona radiate -- Pyramids -- Lateral FuniculusCorona radiate -- Internal capsule -- Crus Cerebri -- Basis Pontis -- PyramidsInternal capsule -- Basis Pontis -- Crus Cerebri -- Corona Radiate -- Lateral Funiculus30s
- Q6The ___________ tract is primarily responsible for flexor activity in the arms and forearms while the _________________ and _____________ tracts primarily control extensor muscles.Anterior Corticospinal; rubrospinal; reticulospinalRubrospinal; reticulospinal; vestibulospinalReticulospinal; vestibulospinal; rubrospinalReticulospinal; spinothalamic; rubrospinal30s
- Q7Which of the following is not true of vestibulospinal tracts?Arise in the brainstemPrimarily excitatory to flexor musculature of the extremities.Act to maintain upright body posture and orientation in spaceNeurons are connected to the vestibular apparatus of the inner ear30s
- Q8An upper motor neuron lesion may result in the Babinski Sign.TRUEFALSE30s
- Q9Tommy 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 commissureIt is a posterior cord syndromeEncroachment upon second order projection neuronsSegmental loss of pain and temperature bilaterally30s
- Q10All of the following are true about Brown-Sequard Syndrome except:Results in loss of pain and temperature on the opposite side of the lesionInvolves damage to one half of the spinal cordResults in paralysis and loss of proprioception on the opposite side of the lesionResults in the loss of two-point discrimination on the ipsilateral side30s