Ch 13 Brainstem 2 - Eye Movements & Pupillary Control

Descripción

(Exam 3) Neuroscience Test sobre Ch 13 Brainstem 2 - Eye Movements & Pupillary Control, creado por Ben Williams el 20/03/2017.
Ben Williams
Test por Ben Williams, actualizado hace más de 1 año
Ben Williams
Creado por Ben Williams hace más de 7 años
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Resumen del Recurso

Pregunta 1

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

Pregunta 2

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

Pregunta 3

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

Pregunta 4

Pregunta
AD-Duction
Respuesta
  • Medial Rectus m.
  • Inferior Rectus m.
  • Superior Rectus m.
  • Inferior Oblique m.
  • Superior Oblique m.
  • Lateral Rectus m.

Pregunta 5

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

Pregunta 6

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

Pregunta 7

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

Pregunta 8

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

Pregunta 9

Pregunta
AB-Duction
Respuesta
  • Lateral Rectus m.
  • Medial Rectus m.
  • Inferior Rectus m.
  • Superior Rectus m.
  • Inferior Oblique m.
  • Superior Oblique m.

Pregunta 10

Pregunta
Oculomotor Palsy is characterized by which form of double vision?

Pregunta 11

Pregunta
Trochlear Palsy is characterized by which form of double vision?

Pregunta 12

Pregunta
Abducens Palsy is characterized by which form of double vision?

Pregunta 13

Pregunta
Label the Image depicting the pathways controlling horizontal eye movements.
Respuesta
  • 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

Pregunta 14

Pregunta
What are the symptoms of Lesion 1?

Pregunta 15

Pregunta
What are the symptoms of Lesion 2?

Pregunta 16

Pregunta
What are the symptoms of Lesion 3?

Pregunta 17

Pregunta
What are the symptoms of Lesion 4?

Pregunta 18

Pregunta
What are the symptoms of Lesion 5?

Pregunta 19

Pregunta
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].
Respuesta
  • Oculomotor
  • Trochlear
  • Abducens
  • III
  • IV
  • VI

Pregunta 20

Pregunta
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].
Respuesta
  • Trochlear
  • Oculomotor
  • Abducens
  • IV
  • III
  • VI

Pregunta 21

Pregunta
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].
Respuesta
  • Abducens
  • Trochlear
  • Oculomotor
  • VI
  • III
  • IV

Pregunta 22

Pregunta
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
Respuesta
  • Diplopia
  • Ptosis
  • Mydriasis
  • Horner’s Syndrome
  • Pseudoptosis

Pregunta 23

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

Pregunta 24

Pregunta
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?
Respuesta
  • 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.

Pregunta 25

Pregunta
Which direction will a patient turn his head to minimize Horizontal Diplopia?
Respuesta
  • 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

Pregunta 26

Pregunta
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.
Respuesta
  • Dilator
  • Sphincter
  • Sphincter
  • Dilator
  • Sympathetic
  • Parasympathetic
  • Parasympathetic
  • Sympathetic

Pregunta 27

Pregunta
Miosis requires relaxation of the Sympathetic NS and activation of the Parasympathetic NS.
Respuesta
  • True
  • False

Pregunta 28

Pregunta
Miosis requires activation of the Sympathetic NS and relaxation of the Parasympathetic NS.
Respuesta
  • True
  • False

Pregunta 29

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

Pregunta 30

Pregunta
The Accommodation Reflex...
Respuesta
  • 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

Pregunta 31

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

Pregunta 32

Pregunta
Which of the following describe Optokinetic Nystagmus?
Respuesta
  • 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

Pregunta 33

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