Sensory and Motor Losses in Disease Process
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Questions and Answers

Which type of touch is primarily detected by Meissner corpuscles?

  • Light touch (correct)
  • Position and movement
  • Discriminative touch
  • Vibration
  • Where do the 1st order neurons synapse in the lower medulla?

  • Nucleus gracilis
  • Nucleus cuneatus (correct)
  • Ventral posterior nucleus of thalamus
  • Dorsal cord
  • What is the consequence of damage to the dorsal columns?

  • Increased sensation of fine touch
  • Loss of proprioception above the level of lesion (correct)
  • Sensory ataxia
  • Contralateral symptoms
  • Which receptors are responsible for detecting tactile and vibration stimuli?

    <p>Pacinian corpuscle</p> Signup and view all the answers

    What is the function of the 2nd order neurons in the sensory pathway?

    <p>Ascend contralaterally to the thalamus</p> Signup and view all the answers

    What clinical syndrome is caused by a severe deficit in touch and proprioception due to destruction of dorsal root ganglion cells?

    <p>Tabes dorsalis</p> Signup and view all the answers

    Damage to the spinothalamic tract would MOST likely result in:

    <p>Bilateral loss of pain and temperature sensation</p> Signup and view all the answers

    Where do the 2nd order neurons decussate in the sensory pathways?

    <p>Anterior white commissure</p> Signup and view all the answers

    In Brown-Sequard Syndrome, what is the key sensory loss pattern?

    <p>Contralateral loss of touch, vibration, and proprioception</p> Signup and view all the answers

    Where do the 3rd order neurons in the sensory pathways travel after leaving the thalamus?

    <p>Cortex</p> Signup and view all the answers

    What is the consequence of syringomyelia on the sensory pathways?

    <p>Bilateral loss of pain and temperature sensation</p> Signup and view all the answers

    Which structure is primarily responsible for transmitting pain and temperature sensations from the spinal cord to the brain?

    <p>Ventral posterior lateral thalamic nucleus</p> Signup and view all the answers

    Where do we find loss of sensations for all somatosensory modalities at the level of the lesion?

    <p>On the ipsilateral side</p> Signup and view all the answers

    Which sensory modalities are lost on the contralateral side below the level of the lesion?

    <p>Pain and temperature</p> Signup and view all the answers

    Where are pain and temperature sensations lost starting about one or two segments below the lesion?

    <p>Contralateral side</p> Signup and view all the answers

    Which tract is responsible for carrying pain and temperature sensations?

    <p>Spinothalamic tract</p> Signup and view all the answers

    Where do we find loss of fine touch and conscious proprioception?

    <p>On the ipsilateral side at a level above the lesion</p> Signup and view all the answers

    Where should damage be located to result in loss of fine touch and conscious proprioception at T6 on the left hand side?

    <p>T6 on the right side</p> Signup and view all the answers

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