Neuro Practice: Vision, Hearing, vestibular, oculomotor

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41 Questions - Developed by: Emilymae.stewart@gmail.com - Developed on: - 255 taken

  • 1
    The cornea:
    Is the muscle of the iris that changes the size of the pupil
    Is the region of the neural retina that has the highest acuity
    Refracts light to focus an image on the retina
    Is the outer layer of the retina that absorbs light and nurtures rods and cones
    Is the location where the retinal ganglion cells leave the retina
  • 2
    The ciliary body:
    Controls the size of the pupil
    Absorbs stray light and nurtures rods and cones
    Controls the shape of the lens
    Refracts light to focus an image on the retina
    Is the location where the retinal ganglion cell axons leave the retina
  • 3
    The fovea:
    Is the location where retinal ganglion cell axons leave the retina
    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.
    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
    Refracts light to focus an image on the retina

  • 4
    The pigment epithelium:
    Refracts light to focus an image on the retina
    Changes the shape of the lens
    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
    Has the highest acuity because the inner cells of the retina are moved to the side, out of the line of sight
  • 5
    The optic disc is where the _______ axons leave the retina
    Corneal ganglion cell
    Horizontal cell
    Retinal ganglion cell
    Bipolar cell
  • 6
    Conversion from light to electric potential occurs in:
    Horizontal cells
    Bipolar cells
    Ganglion cells
    Rods and cones

  • 7
    Bipolar cells synapse upon:
    Ganglion cells
    Horizontal cells
    Amacrine cells
  • 8
    ________ cells send their axons across the retina to the optic disc.
    Horizontal
    Bipolar
    Ganglion
    Amacrine
  • 9
    Which type of cells sharpen the image with lateral inhibition?
    Ganglion and amacrine
    Horizontal and amacrine
    Horizontal
    Amacrine
    Ganglion

  • 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.
    False, they are unmyelinated
    False, they don't cross the retina
    True
  • 11
    A large multiple sclerosis plaque in an optic nerve would most likely result in:
    Loss of vision in the entire contralateral field
    Loss of vision in a lower quadrant of visual field
    Loss of foveal retina in both eyes
    Loss of vision in an upper quadrant of visual field
    Loss of vision in one eye
  • 12
    An occipital lobe lesion is most likely to result in:
    Loss of vision in 1/2 of the visual field of both eyes (vertically split)
    Loss of vision in a quadrant of the visual field of both eyes
    Loss of vision in one eye
    Loss of vision in the foveal retina of both eyes
  • 13
    20-fold amplification of sound conduction is achieved by:
    Tensor tympani and stapedius muscles of middle ear
    The pinna of the ear
    The round window in the wall of the inner ear
    Auditory ossicles of middle ear
    Tympanic membrane
  • 14
    What is the function of tensor tympani and stapedius muscles?
    Engage to compress the walls of the middle ear to increase pressure on endolymph
    Increase the efficiency of ossicles in the middle ear at conducting sound
    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
  • 15
    The round window is:
    Attached to tensor tympani
    Attached to the stapes footplate
    A membrane covered opening between the cochlea and the middle ear that allows fluid to move
    Covered by the ear drum
  • 16
    Loss of hair cells at the apex of the cochlea would be most likely to result in:
    Deafness to low pitched sounds
    Sensitivity to high pitched sounds
    Deafness to high pitched sounds
    Sensitivity to low 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 high pitched sounds
    Deafness to high pitched sounds
    Sensitivity to low pitched sounds
  • 18
    Damage to the facial or trigeminal nerve on one side may result in:
    Deafness to low pitched sounds on side of injury
    Sounds being excessively loud on side of injury
    General deafness on side of injury
    Deafness to high pitched sounds 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
    Damage to right posterior superior temporal and inferior parietal cortex
    Loss of connections in the pontine and mesencephalic tegmentum
    Damage to primary auditory 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?
    Damage to the right posterior superior temporal and inferior parietal cortex
    Damage to the left posterior superior temporal and inferior parietal cortex
    Loss of connections in the pontine and mesencephalic tegmenjtum
    Damage to left ear
    Damage to primary auditory cortex
  • 21
    Movement of the stereo cilia on a hair cell towards the _________ cause an _________ in the membrane potential of the hair cell
    Kinocilium, increase
    Macula, decrease
    Semicircular canal, decrease
    Gelatinous membrane, 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.
    Semicircular canals
    Cupola
    Ampullae
    Maculae
  • 24
    The vestibular nuclei lie ________to the inferior cerebellar peduncle and extend from the rostral medulla to the _______.
    Medial, rostral midbrain
    Lateral, rostral midbrain
    Lateral, anterior midbrain
    Medial, rostral pons
    Lateral, rostral pons
  • 25
    Vestibular nuclei project to and receive from:
    The auditory nerve
    The lateral border of palmaris longus
    The cerebellum
    The occipital lobe
  • 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 in optokinetic reflex
    Loss of proprioception from joint receptors in neck
  • 29
    Trouble staying balanced when moving the head slowly would most likely indicate:
    Loss of optokinetic reflex
    Loss of vestibule-ocular reflex
    Loss of proprioceptive information from cervical spine joints
  • 30
    Superior rectus is innervated by:
    Oculomotor nerve
    Trochlear never
    Abducens nerve
  • 31
    Inferior oblique is innervated by:
    Trochlear nerve
    Abducens nerve
    Oculomotor nerve
  • 32
    Medial rectus is innervated by:
    Trochlear nerve
    Oculomotor nerve
    Trigeminal nerve
    Abducens nerve
  • 33
    Lateral rectus is innervated by
    Oculomotor nerve
    Trochlear nerve
    Abducens nerve
  • 34
    The trochlear nerve innervates:
    Inferior oblique
    Superior rectus
    Superior oblique
    Lateral rectus
    Medial rectus
  • 35
    The inferior rectus is innervated by:
    Trochlear nerve
    Oculomotor nerve
    Abducens nerve
  • 36
    The movement of the eyes when reading or scanning the immediate environment is called:
    Optokinetic reflex
    Saccade
    Smooth pursuit
    Divergent eye movements
    Vestibule-ocular reflex
  • 37
    Which of the following would one use to watch a bird in flight, at some distance?
    Divergent eye movements
    Scanning saccades
    Smooth pursuit
    Vestibulo-ocular reflex
    Optokinetic 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?
    Vestibular nuclei
    Paramedian pontine reticular formation rostral to abducens nucleus
    Flocculonodular lobe of cerebellum
    Abducens nucleus
  • 39
    A patient is unable to look toward her right (with her eyes). What is likely the problem?
    Lesion of the abducens nerve on the right
    Lesion of the abducens nerve on the left
    Lesion of the trochlear never on the right
    Lesion of the oculomotor nerve
    Lesion of the trochlear nerve on the left
  • 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:
    Saccades
    Scanning saccades
    Smooth pursuit
    Optokinetic reflex
    Divergent eye movements


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