Ch 13 Brainstem 2 - Eye Movements & Pupillary Control

Ben Williams
Quiz by Ben Williams, updated more than 1 year ago
Ben Williams
Created by Ben Williams over 3 years ago
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Neuroscience (Exam 3) Quiz on Ch 13 Brainstem 2 - Eye Movements & Pupillary Control, created by Ben Williams on 03/20/2017.
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Resource summary

Question 1

Question
Which muscles are innervated by CN III - Occulomotor n.?
Answer
  • Medial Rectus m.
  • Superior Rectus m.
  • Inferior Rectus m.
  • Inferior Oblique m.
  • Superior Oblique m.
  • Lateral Rectus m.

Question 2

Question
Which muscles are innervated by CN IV - Trochlear n.?
Answer
  • Superior Oblique m.
  • Lateral Rectus m.
  • Medial Rectus m.
  • Superior Rectus m.
  • Inferior Rectus m.
  • Inferior Oblique m.

Question 3

Question
Which muscles are innervated by CN VI - Abducens n.?
Answer
  • Lateral Rectus m.
  • Medial Rectus m.
  • Superior Rectus m.
  • Inferior Rectus m.
  • Inferior Oblique m.
  • Superior Oblique m.

Question 4

Question
AD-Duction
Answer
  • Medial Rectus m.
  • Inferior Rectus m.
  • Superior Rectus m.
  • Inferior Oblique m.
  • Superior Oblique m.
  • Lateral Rectus m.

Question 5

Question
Depression and Extorsion; Depression increases with AB-Duction
Answer
  • Inferior Rectus m.
  • Medial Rectus m.
  • Superior Rectus m.
  • Inferior Oblique m.
  • Superior Oblique m.
  • Lateral Rectus m.

Question 6

Question
Elevation and Intorsion; Elevation Increases with AB-Duction
Answer
  • Superior Rectus m.
  • Inferior Rectus m.
  • Medial Rectus m.
  • Inferior Oblique m.
  • Superior Oblique m.
  • Lateral Rectus m.

Question 7

Question
Elevation and Extorsion; Elevation increases with AD-Duction
Answer
  • Inferior Oblique m.
  • Superior Oblique m.
  • Lateral Rectus m.
  • Medial Rectus m.
  • Inferior Rectus m.
  • Superior Rectus m.

Question 8

Question
Depression and Intorsion; Depression increases with AD-Duction
Answer
  • Superior Oblique m.
  • Lateral Rectus m.
  • Medial Rectus m.
  • Inferior Rectus m.
  • Superior Rectus m.
  • Inferior Oblique m.

Question 9

Question
AB-Duction
Answer
  • Lateral Rectus m.
  • Medial Rectus m.
  • Inferior Rectus m.
  • Superior Rectus m.
  • Inferior Oblique m.
  • Superior Oblique m.

Question 10

Question
Oculomotor Palsy is characterized by which form of double vision?
Answer

Question 11

Question
Trochlear Palsy is characterized by which form of double vision?
Answer

Question 12

Question
Abducens Palsy is characterized by which form of double vision?
Answer

Question 13

Question
Label the Image depicting the pathways controlling horizontal eye movements.
Answer
  • Lateral Rectus m.
  • Medial Rectus m.
  • CN VI
  • CN III
  • Oculomotor Nucleus
  • Medial Longitudinal Fasciculus (MLF)
  • Abducens Nucleus
  • Paramedian Pontine Reticular Formation
  • CN II
  • CN IV

Question 14

Question
What are the symptoms of Lesion 1?

Question 15

Question
What are the symptoms of Lesion 2?

Question 16

Question
What are the symptoms of Lesion 3?

Question 17

Question
What are the symptoms of Lesion 4?

Question 18

Question
What are the symptoms of Lesion 5?

Question 19

Question
The nuclei located in the Upper Midbrain at the level of the Superior Colliculi and Red Nuclei, just ventral to the Periaqueductal Gray Matter is called the [blank_start]Oculomotor[blank_end] Nuclei and corresponds to CN [blank_start]III[blank_end].
Answer
  • Oculomotor
  • Trochlear
  • Abducens
  • III
  • IV
  • VI

Question 20

Question
The nuclei located in the Lower Midbrain at the level of the Inferior Colliculi and the decussation of the Superior Cerebellar Peduncle is the [blank_start]Trochlear[blank_end] Nuclei which corresponds with CN [blank_start]IV[blank_end].
Answer
  • Trochlear
  • Oculomotor
  • Abducens
  • IV
  • III
  • VI

Question 21

Question
The nucleus located in the Floor of 4th Ventricle under the Facial Colliculi in the Mid-to-lower Pons is the [blank_start]Abducens[blank_end] Nucleus which corresponds to CN [blank_start]VI[blank_end].
Answer
  • Abducens
  • Trochlear
  • Oculomotor
  • VI
  • III
  • IV

Question 22

Question
These are the possible causes of what condition? -Mechanical problems (i.e. Orbital fracture) -Disorders of the extraocular muscles (i.e. Thyroid disease) -Disorders of the neuromuscular junction (i.e. Myasthenia gravis) -Disorders of CN III, IV, VI and their pathways
Answer
  • Diplopia
  • Ptosis
  • Mydriasis
  • Horner’s Syndrome
  • Pseudoptosis

Question 23

Question
Patient presents with their left eye in the "Down and Out Position" and slight Ptosis. Which CN do you immediately suspect is involved?
Answer
  • CN III
  • CN IV
  • CN VI

Question 24

Question
As you walk into the waiting room to greet a new patient, he turns his ahead away from you and tucks his chin to his chest. Which is the most likely cause of this behavior?
Answer
  • Patient has Vertical Diplopia so he is trying to minimize the effect while focusing on you.
  • Patient is rather shy. Just give him some time to warm up to you.
  • Patient has Abducens Palsy so he is trying to minimize the effect while focusing on you.
  • Patient has Optokinetic Nystagmus and is trying to focus on you.

Question 25

Question
Which direction will a patient turn his head to minimize Horizontal Diplopia?
Answer
  • Toward the affected eye
  • Away from the affected eye
  • Head movements alone will not correct a Horizontal Diplopia
  • Away from the affected eye with the chin tucked to the chest

Question 26

Question
For Mydriasis [blank_start]Sympathetic[blank_end] Activation causes Contraction of the Pupillary [blank_start]Dilator[blank_end] Muscle and [blank_start]Parasympathetic[blank_end] Relaxation causes Relaxation of the Pupillary [blank_start]Sphincter[blank_end] Muscle.
Answer
  • Dilator
  • Sphincter
  • Sphincter
  • Dilator
  • Sympathetic
  • Parasympathetic
  • Parasympathetic
  • Sympathetic

Question 27

Question
Miosis requires relaxation of the Sympathetic NS and activation of the Parasympathetic NS.
Answer
  • True
  • False

Question 28

Question
Miosis requires activation of the Sympathetic NS and relaxation of the Parasympathetic NS.
Answer
  • True
  • False

Question 29

Question
Mydriasis can be caused by which of the following?
Answer
  • Pupillary Light Reflex responding to decreased light entering the eye.
  • Pupillary Light Reflex responding to increased light entering the eye.
  • Accommodation Reflex
  • Parasympathetic Activation

Question 30

Question
The Accommodation Reflex...
Answer
  • occurs when an object being focused upon moves closer
  • occurs when an object being focused upon moves further away
  • is related to Mydriasis
  • is related to Pseudoptosis
  • is related to Ptosis

Question 31

Question
The following are possible causes for which condition? -Horner’s Syndrome -Oculomotor Palsy -Myasthenia Gravis
Answer
  • Ptosis
  • Pseudoptosis
  • Miosis
  • Mydriasis
  • Optokinetic Nystagmus

Question 32

Question
Which of the following describe Optokinetic Nystagmus?
Answer
  • Allows the eye to follow objects in motion when the head remains stationary
  • Composed of slow eye movements in one direction interrupted repeatedly by fast, saccade-like eye movements in the opposite direction
  • Stabilizes the eyes on a visual image during head and body movements
  • Occurs normally
  • Indicative of CN III lesion
  • Indicative of CN VI lesion

Question 33

Question
[blank_start]Vestibulo-Ocular Reflex[blank_end] stabilizes the eyes on a visual image during head and body movements
Answer
  • Vestibulo-Ocular Reflex
  • Optokinetic Nystagmus
  • Pseudoptosis
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