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Sensory System Lesions

Quiz by OASIS

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21 questions
Show answers
  • Q1
    Which area of the brain is a major source of regulatory input to the thalamus?
    Reticular thalamic nucleus
    Reticular formation
    Basal ganglia
    Cerebral cortex
    30s
  • Q2
    Which is FALSE regarding the following areas of primary somatosensory cortex?
    Area 3a receives proprioceptive input from muscle
    Area 2 processes proprioceptive input from joint afferents
    Area 1 receives the densest thalamic projections of sensory areas
    Area 3b receives information from cutaneous receptors related to the size, shape and texture of an object
    30s
  • Q3
    If the right index and middle finger are lost in an accident, what changes might you expect from the cortical representation related to that area?
    The cortical representation of adjacent fingers will take over the areas previously dedicated to those that were amputated
    The cortical representation of the right index and middle finger will be relocated to the left index and middle finger.
    If changes do occur, it is a very slow process taking up to years to respond
    Nothing, the cortical representation would remain the same
    30s
  • Q4
    Which of the following is TRUE regarding the secondary somatosensory cortex (SII)?
    The receptive fields of SII are small and very distinct from one another
    It is organized such that the foot is represented adjacent to the head region of SI
    Input to SII come from both sides of the body and head
    It is located adjacent to the primary somatosensory cortex (SI) on the postcentral gyrus
    30s
  • Q5
    Goal directed voluntary movements, object manipulation, and visually guided movements are related to which region of somatosensory cortex?
    Temporal cortical regions
    Occipital cortical regions
    Frontal cortical regions
    Parietal cortical regions
    30s
  • Q6
    An abnormal sensation that is unpleasant not may not be directly painful is known as
    Hyperalgesia
    Dysesthesia
    Hyperpathia
    Paresthesia
    30s
  • Q7
    A selective sensory loss of modalities (i.e., loss of pain and temperature but not vibration sense) is less common in which of the following areas
    T10
    L4
    In the ventrobasal complex
    S2
    30s
  • Q8
    Unilateral brainstem lesions generally result in
    Contralateral cranial nerve dysfunction and ipsilateral sensory and/or motor deficits for the body
    Involvement of cranial nerves but not sensory and/or motor long tracts
    Ipsilateral cranial nerve dysfunction and contralateral sensory and/or motor deficits for the body
    Ipsilateral cranial nerve dysfunction and ipsilateral sensory and/or motor deficits for the body
    30s
  • Q9
    What is FALSE regarding thalamic lesions?
    Sensory deficits from thalamic lesions are contralateral and usually incomplete
    Lesions of the VPL or VPM usually produce sensory and motor deficits
    A lesion to the left thalamus will result in damage to the right face and body
    Common symptoms of thalamic pain syndrome include hemianesthesia, astereognosis, dysesthesia, and hyperpathia
    30s
  • Q10
    Somatosensory cortex lesions
    Result in somatosensory losses where discriminative touch and proprioception recover first and completely
    Are recognized clinically by the primary symptom of astereognosis
    Can produce corresponding sensory loss in the body area of the somatotopic map but not in the modalities served
    30s
  • Q11
    What kind of pain can be explained by the convergence of nociceptive fibers from different sources on the same second-order neuron in the spinal cord or in the thalamus?
    Fast pain
    Pain matrix
    Slow Pain
    Referred Pain
    30s
  • Q12
    Which of the following brainstem areas can inhibit nociceptive information coming from the anterolateral system?
    Rostral ventromedial medulla
    Ceruleospinal tract (from locus coeruleus)
    Raphespinal tract
    Periaqueductal gray
    30s
  • Q13
    Which of the following is a function of a free nerve ending?
    Vibration Sensation
    Cutaneous Sensation
    Proprioception
    Temperature Sensation
    30s
  • Q14
    The ability to discriminate accurately where a stationary fly is on your body is determined by what factor(s)?
    The size and number of receptive fields where the fly has landed on
    The number of receptive fields the fly has landed on
    If the fly has landed on a hair receptor
    How large the receptive field is where the fly has landed on
    30s
  • Q15
    Higher intensity input can be focused through the dorsal column nuclei to define edges and boundaries via what mechanism?
    Feed-Forward Inhibition
    Feedback Loop Synergy
    Medial Inhibition
    Lateral Inhibition
    30s

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