Neuro Practice: Vision, Hearing, vestibular, oculomotor

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41 Questions - Developed by: Emilymae.stewart@gmail.com - Developed on: - 407 taken

  • 1
    The cornea:
    Refracts light to focus an image on the retina
    Is the region of the neural retina that has the highest acuity
    Is the location where the retinal ganglion cells leave the retina
    Is the muscle of the iris that changes the size of the pupil
    Is the outer layer of the retina that absorbs light and nurtures rods and cones
  • 2
    The ciliary body:
    Controls the shape of the lens
    Controls the size of the pupil
    Absorbs stray light and nurtures rods and cones
    Is the location where the retinal ganglion cell axons leave the retina
    Refracts light to focus an image on the retina
  • 3
    The fovea:
    Is the location where retinal ganglion cell axons leave the retina
    Is the outer layer of the retina that absorbs stray light and nurtures rods and cones
    Contains the muscles of the iris that change the size of the pupil
    Is a region of the neural retina that has the highest acuity because the inner cells of the retina are moved to the side, out of the line of sight.
    Refracts light to focus an image on the retina
  • 4
    The pigment epithelium:
    Is the location where retinal ganglion cell axons leave the retina
    Has the highest acuity because the inner cells of the retina are moved to the side, out of the line of sight
    Changes the shape of the lens
    Is the outer layer of the retina that absorbs stray light and nurtures rods and cones
    Refracts light to focus an image on the retina
  • 5
    The optic disc is where the _______ axons leave the retina
    Bipolar cell
    Horizontal cell
    Corneal ganglion cell
    Retinal ganglion cell
  • 6
    Conversion from light to electric potential occurs in:
    Ganglion cells
    Horizontal cells
    Bipolar cells
    Rods and cones
  • 7
    Bipolar cells synapse upon:
    Ganglion cells
    Amacrine cells
    Horizontal cells
  • 8
    ________ cells send their axons across the retina to the optic disc.
    Ganglion
    Bipolar
    Amacrine
    Horizontal
  • 9
    Which type of cells sharpen the image with lateral inhibition?
    Horizontal and amacrine
    Ganglion and amacrine
    Ganglion
    Horizontal
    Amacrine
  • 10
    Rental axons are heavily myelinated as they cross the retina, so as to get the information from the retina to the brain as fast as possible.
    True
    False, they are unmyelinated
    False, they don't cross the retina
  • 11
    A large multiple sclerosis plaque in an optic nerve would most likely result in:
    Loss of vision in an upper quadrant of visual field
    Loss of vision in one eye
    Loss of foveal retina in both eyes
    Loss of vision in the entire contralateral field
    Loss of vision in a lower quadrant of visual field
  • 12
    An occipital lobe lesion is most likely to result in:
    Loss of vision in the foveal retina of both eyes
    Loss of vision in a quadrant of the visual field of both eyes
    Loss of vision in 1/2 of the visual field of both eyes (vertically split)
    Loss of vision in one eye
  • 13
    20-fold amplification of sound conduction is achieved by:
    Tensor tympani and stapedius muscles of middle ear
    Tympanic membrane
    The pinna of the ear
    The round window in the wall of the inner ear
    Auditory ossicles of middle ear
  • 14
    What is the function of tensor tympani and stapedius muscles?
    Make the ossicles less efficient at conducting sound if sound is too great ( protection mechanism)
    Engage to pull the walls of the middle ear away and decrease pressure on endolymph
    Increase the efficiency of ossicles in the middle ear at conducting sound
    Engage to compress the walls of the middle ear to increase pressure on endolymph
  • 15
    The round window is:
    Attached to tensor tympani
    Attached to the stapes footplate
    Covered by the ear drum
    A membrane covered opening between the cochlea and the middle ear that allows fluid to move
  • 16
    Loss of hair cells at the apex of the cochlea would be most likely to result in:
    Sensitivity to low pitched sounds
    Deafness to high pitched sounds
    Deafness to low pitched sounds
    Sensitivity to high pitched sounds
  • 17
    Loss of hair cells in the base of the cochlea is most likely to result in:
    Deafness to low pitched sounds
    Sensitivity to low pitched sounds
    Deafness to high pitched sounds
    Sensitivity to high pitched sounds
  • 18
    Damage to the facial or trigeminal nerve on one side may result in:
    General deafness on side of injury
    Deafness to high pitched sounds on side of injury
    Deafness to low pitched sounds on side of injury
    Sounds being excessively loud on side of injury
  • 19
    Loss of any awareness of sound, but an ability to react reflexively to sounds is most likely due to:
    Damage to right thalamus
    Loss of connections in the pontine and mesencephalic tegmentum
    Damage to primary auditory cortex
    Damage to right posterior superior temporal and inferior parietal cortex
  • 20
    A patient presents with a peculiar hearing deficit in that they respond to people sitting on their right side, but not to people sitting on their left side. Where are you going to expect to find the source of the problem?
    Loss of connections in the pontine and mesencephalic tegmenjtum
    Damage to left ear
    Damage to primary auditory cortex
    Damage to the left posterior superior temporal and inferior parietal cortex
    Damage to the right posterior superior temporal and inferior parietal cortex
  • 21
    Movement of the stereo cilia on a hair cell towards the _________ cause an _________ in the membrane potential of the hair cell
    Macula, decrease
    Gelatinous membrane, decrease
    Kinocilium, increase
    Semicircular canal, decrease
  • 22
    The hair cells in the crust ampullae of a semicircular canal are all oriented:
    In the same direction
    In alternating opposing directions
    ...
  • 23
    Which structure matches best: Any movement of the head will stimulate hair cells in at least one of the ______. The movements that are most effective are acceleration in a straight line, such as accelerating in a car or the pull of gravity.
    Cupola
    Maculae
    Semicircular canals
    Ampullae
  • 24
    The vestibular nuclei lie ________to the inferior cerebellar peduncle and extend from the rostral medulla to the _______.
    Lateral, rostral pons
    Medial, rostral pons
    Lateral, rostral midbrain
    Lateral, anterior midbrain
    Medial, rostral midbrain
  • 25
    Vestibular nuclei project to and receive from:
    The occipital lobe
    The auditory nerve
    The lateral border of palmaris longus
    The cerebellum
  • 26
    There is a direct projection of cerebellar purkinje cells into ____________.
    Vestibular nuclei
    The cervical spinal cord
    Vestibulospinal tracts
  • 27
    The lateral vestibulospinal tract projects to neurons along the full length of the spinal cord
    False
    True
    ...
  • 28
    Which of the following is most likely related to problems staying balanced with rapid head movements?
    Loss in vestibulo-ocular reflex
    Loss of proprioception from joint receptors in neck
    Loss in optokinetic reflex
  • 29
    Trouble staying balanced when moving the head slowly would most likely indicate:
    Loss of optokinetic reflex
    Loss of proprioceptive information from cervical spine joints
    Loss of vestibule-ocular reflex
  • 30
    Superior rectus is innervated by:
    Abducens nerve
    Oculomotor nerve
    Trochlear never
  • 31
    Inferior oblique is innervated by:
    Trochlear nerve
    Oculomotor nerve
    Abducens nerve
  • 32
    Medial rectus is innervated by:
    Trochlear nerve
    Trigeminal nerve
    Abducens nerve
    Oculomotor nerve
  • 33
    Lateral rectus is innervated by
    Trochlear nerve
    Abducens nerve
    Oculomotor nerve
  • 34
    The trochlear nerve innervates:
    Superior oblique
    Lateral rectus
    Inferior oblique
    Medial rectus
    Superior rectus
  • 35
    The inferior rectus is innervated by:
    Oculomotor nerve
    Trochlear nerve
    Abducens nerve
  • 36
    The movement of the eyes when reading or scanning the immediate environment is called:
    Vestibule-ocular reflex
    Smooth pursuit
    Saccade
    Optokinetic reflex
    Divergent eye movements
  • 37
    Which of the following would one use to watch a bird in flight, at some distance?
    Smooth pursuit
    Scanning saccades
    Optokinetic reflex
    Divergent eye movements
    Vestibulo-ocular reflex
  • 38
    A patient finds it difficult to saccade from side to side, but retains the ability to look up and down. If her head is rotated to the left, then her eyes move to the right and, if her head is rotated to the right, her eyes move to the left. She can accurately fixate upon a visual target and follow its movements as long as it moves vertically. Which of the following locations is most apt to the site of the problem?
    Abducens nucleus
    Vestibular nuclei
    Flocculonodular lobe of cerebellum
    Paramedian pontine reticular formation rostral to abducens nucleus
  • 39
    A patient is unable to look toward her right (with her eyes). What is likely the problem?
    Lesion of the trochlear nerve on the left
    Lesion of the trochlear never on the right
    Lesion of the abducens nerve on the left
    Lesion of the abducens nerve on the right
    Lesion of the oculomotor nerve
  • 40
    Deficits in visual tracking and oculomotor control (such as nystagmus and vertigo), integration of vestibular information for eye and head control, as well as control of axial muscles for balance are related to a lesion where?
    Flocculonodular lobe of cerebellum
    Vestibular nuclei
    The abducens nucleus
  • 41
    The simultaneous outward movement of both eyes away from each other, usually in an effort to maintain single binocular vision when viewing an object is called:
    Smooth pursuit
    Optokinetic reflex
    Divergent eye movements
    Scanning saccades
    Saccades

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