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Neuroanatomy Test II Quiz I Motor Tracts

espiri4604 12 preguntas

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Preguntas del test (12)

  1. 1A 47-year-old welder presents at the Emergency Department with sudden onset of difficulty
    speaking. The examination reveals slurred speech, deviation of the tongue to the right on
    attempted protrusion, and weakness of the lower facial muscles also on the right. CT shows a
    well-localized hemorrhagic lesion that is most likely located in which of the following?
    1. A(A) Anterior limb of the internal capsule on the left
    2. B(D) Posterior limb of the internal capsule on the left
    3. C(E) Posterior limb of the internal capsule on the right
  2. 2Which of the following is the receptor for the afferent limb of the patellar tendon reflex or the jaw
    jerk reflex?
    1. A(A) Golgi tendon organ
    2. B(B) Merkel cell ending
    3. C(C) Muscle spindle
    4. D(D) Pacinian corpuscle
    5. E(E) Ruffini ending
  3. 3Which of the following is a sign that would most likely be seen in a patient with a lower motor
    neuron lesion?
    1. A(A) Hyperreflexia
    2. B(B) Hypertonia
    3. C(C) Muscle fasciculations
    4. D(D) Muscle groups affected
    5. E(E) Muscle spasticity
  4. 4The MRI of a 71-year-old man suggests a small vascular lesion affecting the structure indicated
    by the arrow in the image below. Which of the following would you most likely expect to see in
    this patient?
    1. A(A) Left internuclear ophthalmoplegia
    2. B(B) Paralysis of lateral rectus on gaze to the left
    3. C(C) Paralysis of lateral rectus on gaze to the right
    4. D(D) Tongue deviates to the left on protrusion
    5. E(E) Tongue deviates to the right on protrusion
  5. 5The MRI of a 56-year-old man presents with a sudden loss of motor function of his right hand.
    The MRI reveals a circumscribed cortical lesion, most likely hemorrhagic in origin. Which of the
    following represents the most likely location of this lesion?
    1. A(A) Anterior paracentral gyrus
    2. B(B) Lateral third of the precentral gyrus
    3. C(C) Medial third of the precentral gyrus
    4. D(D) Middle third of the precentral gyrus
    5. E(E) Middle third of the postcentral gyrus
  6. 6A Neurologist sees three patients in her clinic. These are a 23-year-old man with a Brown-
    Séquard syndrome resulting from trauma at C3-5, a 69-year-old woman with a Wallenberg
    syndrome, and a 79-year-old man with a hemorrhagic stroke in the lateral portions of the pontine
    tegmentum. In addition to the expected deficits, a careful examination would also reveal which of
    the following in all three patients?
    1. A(A) A loss of discriminative touch on the forehead
    2. B(B) A loss of pain and thermal sensation on one side of the face
    3. C(C) Constriction of the pupil (miosis) on the side of the lesion
    4. D(D) Deviation of the tongue and uvula on attempted phonation
    5. E(E) Weakness of the digits on the side opposite the lesion
  7. 7Which of the following encodes the rate of change in muscle length during contraction of a
    skeletal muscle?
    1. A(A) Dynamic nuclear bag fibers
    2. B(B) Golgi tendon organ
    3. C(C) Merkel cell ending
    4. D(D) Nuclear chain fibers
    5. E(E) Static nuclear bag fiber
  8. 8A 37-year-old woman presents to her family physician with intermittent physical problems. She is
    referred to a neurologist and, after a thorough examination, a tentative diagnosis of multiple
    sclerosis is made. MRI shows an area of demyelination in the region indicated by the arrow in
    the image below. Which of the following deficits would correlate most specifically with the
    location of this lesion?
    1. A(A) Tongue deviates to the left, weak left upper and lower extremities
    2. B(B) Tongue deviates to the left, weak left lower extremity
    3. C(C) Tongue deviates to the right, weak left upper and lower extremities
    4. D(D) Tongue deviates to the right, weak left lower extremity
    5. E(E) Tongue deviates to the right, weak left upper extremity
  9. 9A 67-year-old man presents at the Emergency Department with a medial medullary (Dejerine)
    syndrome. He has a right-sided weakness of the UE and LE, a right-sided loss of vibratory sense
    and discriminative touch, and a deviation of the tongue to the left on attempted protrusion.
    Weakness of which of the following muscles would explain the asymmetrical tongue movement in
    this man?
    1. A(A) Chondroglossus
    2. B(B) Genioglossus
    3. C(C) Hyoglossus
    4. D(D) Palatoglossus
    5. E(E) Styloglossus
  10. 10A 47-year-old man is brought to the Emergency Department from the site of a motor vehicle
    collision. The examination reveals facial injuries with a probable broken nose, a compound
    fracture of the left humerus, and large bruises/contusions on his left thigh. CT confirms these
    observations and shows a skull fracture in the left frontal region, extensive intracranial
    hemorrhage, a fracture through the left orbit, and a fractured pelvis. The man is unconscious and
    within 6 hours exhibits decorticate posturing. Excessive action in which of the following
    tracts/systems would explain the flexion of the upper extremities in this man?
    1. A(A) Anterolateral
    2. B(B) Corticospinal
    3. C(C) Reticulospinal
    4. D(D) Rubrospinal
    5. E(E) Vestibulospinal

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Test sobre Neuroanatomy Test II Quiz I Motor Tracts, creado por espiri4604 el 09/04/2015.
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