Neurological Assessment of Cranial Nerves Quiz
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Questions and Answers

What causes the pathological or spontaneous nystagmus in animals?

  • Presence of strabismus
  • Loss of muscle tone in one side of the body
  • Damage to the cochlea
  • No input from one side of the vestibular system (correct)

    • How can a lesion in the apparatus including the tympanic membrane and 3 small bones affect an animal?

  • Induce pathological nystagmus
  • Result in deafness (correct)
  • Cause vestibular ataxia
  • Lead to strabismus

    • What is the function of the cochlea in animals?

  • Maintain balance
  • Convert sound waves into electrical impulses (correct)
  • Control muscle tone
  • Regulate eye movements

    • Why is it important to test an animal's hearing with a loud clap out of its field of view?

    <p>To get a yes or no response</p> Signup and view all the answers

    What could be a symptom of a lesion in the cochlea in an animal?

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

    How does a brainstem auditory evoked response (BAER) help in testing an animal's hearing?

    <p>Provides an objective way to test hearing</p> Signup and view all the answers

    What is the purpose of the first test mentioned in the text?

    <p>To test proprioception in the distal limb</p> Signup and view all the answers

    Where does proprioceptive information travel to after reaching the brainstem?

    <p>To the sensorimotor cortex</p> Signup and view all the answers

    What is the function of proprioceptive pathways?

    <p>To carry general proprioceptive information</p> Signup and view all the answers

    Why are proprioceptive pathways sensitive to injury?

    <p>Due to their length, reaching from toe to brainstem</p> Signup and view all the answers

    In what circumstance might abnormalities in proprioceptive positioning occur before motor dysfunction is detected?

    <p>When significant paresis exists</p> Signup and view all the answers

    What does the hopping reaction test evaluate?

    <p>Postural reactions</p> Signup and view all the answers

    What is being assessed during the swinging flashlight test?

    <p>Pupillary light reflex abnormalities</p> Signup and view all the answers

    In a patient with mydriasis in the right eye, if shining a light in the right eye causes the left eye to constrict, what does this indicate?

    <p>Lesion in the occulomotor nerve on the right</p> Signup and view all the answers

    What symptoms are observed in Horner syndrome?

    <p>Constricted pupil, drooping lid, sunken eye</p> Signup and view all the answers

    Where does the second order neuron of the oculo-sympathetic pathway begin?

    <p>Gray matter of T1, T2, T3 spinal cord segments</p> Signup and view all the answers

    What condition should be assessed if miosis (small pupil) is present during the examination?

    <p>Horner syndrome</p> Signup and view all the answers

    If shining a light in the right eye does not lead to constriction in either eye but constriction occurs when light is shone on the left eye, where is the likely lesion location?

    <p>Pre-chiasmal on the right</p> Signup and view all the answers

    What should be inspected in the tongue to assess the Hypoglossal Nerve?

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

    What is a common behavior observed in animals immediately after testing the gag reflex?

    <p>Licking their nose</p> Signup and view all the answers

    In patients with unilateral loss of innervation, what is a common observation regarding tongue movement?

    <p>Tongue deviates towards the unaffected side</p> Signup and view all the answers

    Which action can help in assessing tongue function along with other cranial nerve functions?

    <p>Watching the patient drink water</p> Signup and view all the answers

    What is involved in evaluating proprioception through Paw (Foot, Hoof, Limb) Placement?

    <p>Evaluating light touch and pressure</p> Signup and view all the answers

    What is the incorrect assumption to make regarding abnormalities observed during proprioceptive dysfunction evaluation?

    <p>Assuming it only affects sensory functions</p> Signup and view all the answers

    Which of the following is true about clonus?

    <p>It is often associated with UMN injury</p> Signup and view all the answers

    What is the significance of bilateral exaggerated reflexes?

    <p>Indicate damage to UMN pathways above the level of the reflex</p> Signup and view all the answers

    Which nerve innervates the cranial tibial muscle involved in testing the cranial tibial reflex?

    <p>Peroneal nerve</p> Signup and view all the answers

    What reflex is elicited when striking the gastrocnemius muscle tendon?

    <p>Extension of the hock</p> Signup and view all the answers

    How should one interpret absent or decreased reflexes?

    <p>With caution as it may be an examiner error</p> Signup and view all the answers

    In a normal animal, which reflex is more difficult to elicit, compared to the patellar reflex?

    <p>Cranial tibial reflex</p> Signup and view all the answers

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