Ch 13 Brainstem 2 - Eye Movements & Pupillary Control

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Question 1 of 33

Which muscles are innervated by CN III - Occulomotor n.?

Select one or more of the following:

Medial Rectus m.
Superior Rectus m.
Inferior Rectus m.
Inferior Oblique m.
Superior Oblique m.
Lateral Rectus m.

Explanation

Question 2 of 33

Which muscles are innervated by CN IV - Trochlear n.?

Select one or more of the following:

Superior Oblique m.
Lateral Rectus m.
Medial Rectus m.
Superior Rectus m.
Inferior Rectus m.
Inferior Oblique m.

Explanation

Question 3 of 33

Which muscles are innervated by CN VI - Abducens n.?

Select one or more of the following:

Lateral Rectus m.
Medial Rectus m.
Superior Rectus m.
Inferior Rectus m.
Inferior Oblique m.
Superior Oblique m.

Explanation

Question 4 of 33

AD-Duction

Select one of the following:

Medial Rectus m.
Inferior Rectus m.
Superior Rectus m.
Inferior Oblique m.
Superior Oblique m.
Lateral Rectus m.

Explanation

Question 5 of 33

Depression and Extorsion;
Depression increases with AB-Duction

Select one of the following:

Inferior Rectus m.
Medial Rectus m.
Superior Rectus m.
Inferior Oblique m.
Superior Oblique m.
Lateral Rectus m.

Explanation

Question 6 of 33

Elevation and Intorsion;
Elevation Increases with AB-Duction

Select one of the following:

Superior Rectus m.
Inferior Rectus m.
Medial Rectus m.
Inferior Oblique m.
Superior Oblique m.
Lateral Rectus m.

Explanation

Question 7 of 33

Elevation and Extorsion;
Elevation increases with AD-Duction

Select one of the following:

Inferior Oblique m.
Superior Oblique m.
Lateral Rectus m.
Medial Rectus m.
Inferior Rectus m.
Superior Rectus m.

Explanation

Question 8 of 33

Depression and Intorsion;
Depression increases with AD-Duction

Select one of the following:

Superior Oblique m.
Lateral Rectus m.
Medial Rectus m.
Inferior Rectus m.
Superior Rectus m.
Inferior Oblique m.

Explanation

Question 9 of 33

AB-Duction

Select one of the following:

Lateral Rectus m.
Medial Rectus m.
Inferior Rectus m.
Superior Rectus m.
Inferior Oblique m.
Superior Oblique m.

Explanation

Question 10 of 33

Oculomotor Palsy is characterized by which form of double vision?

Select one of the following:

Diagonal Diplopia
Vertical Diplopia
Horizontal Diplopia

Explanation

Question 11 of 33

Trochlear Palsy is characterized by which form of double vision?

Select one of the following:

Vertical Diplopia
Diagonal Diplopia
Horizontal Diplopia

Explanation

Question 12 of 33

Abducens Palsy is characterized by which form of double vision?

Select one of the following:

Horizontal Diplopia
Diagonal Diplopia
Vertical Diplopia

Explanation

Question 13 of 33

Label the Image depicting the pathways controlling horizontal eye movements.

Drag an answer into the correct orange point.

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

Explanation

Question 14 of 33

What are the symptoms of Lesion 1?

Select one of the following:

R Abducens Palsy
R Lateral Gaze Palsy
Left INO
1 1/2 Syndrome

Explanation

Question 15 of 33

What are the symptoms of Lesion 2?

Select one of the following:

R Abducens Palsy
R Lateral Gaze Palsy
Left INO
1 1/2 Syndrome

Explanation

Question 16 of 33

What are the symptoms of Lesion 3?

Select one of the following:

R Abducens Palsy
R Lateral Gaze Palsy
Left INO
1 1/2 Syndrome

Explanation

Question 17 of 33

What are the symptoms of Lesion 4?

Select one of the following:

R Abducens Palsy
R Lateral Gaze Palsy
Left INO
1 1/2 Syndrome

Explanation

Question 18 of 33

What are the symptoms of Lesion 5?

Select one of the following:

R Abducens Palsy
R Lateral Gaze Palsy
Left INO
1 1/2 Syndrome

Explanation

Question 19 of 33

Select from the dropdown lists to complete the text.

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 ( Oculomotor, Trochlear, Abducens ) Nuclei and corresponds to CN ( III, IV, VI ).

Explanation

Question 20 of 33

Select from the dropdown lists to complete the text.

The nuclei located in the Lower Midbrain at the level of the Inferior Colliculi and the decussation of the Superior Cerebellar Peduncle is the ( Trochlear, Oculomotor, Abducens ) Nuclei which corresponds with CN ( IV, III, VI ).

Explanation

Question 21 of 33

Select from the dropdown lists to complete the text.

The nucleus located in the Floor of 4th Ventricle under the Facial Colliculi in the Mid-to-lower Pons is the ( Abducens, Trochlear, Oculomotor ) Nucleus which corresponds to CN ( VI, III, IV ).

Explanation

Question 22 of 33

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

Select one of the following:

Diplopia
Ptosis
Mydriasis
Horner’s Syndrome
Pseudoptosis

Explanation

Question 23 of 33

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

Select one of the following:

CN III
CN IV
CN VI

Explanation

Question 24 of 33

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?

Select one of the following:

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.

Explanation

Question 25 of 33

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

Select one of the following:

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

Explanation

Question 26 of 33

Select from the dropdown lists to complete the text.

For Mydriasis ( Sympathetic, Parasympathetic ) Activation causes Contraction of the Pupillary ( Dilator, Sphincter ) Muscle and ( Parasympathetic, Sympathetic ) Relaxation causes Relaxation of the Pupillary ( Sphincter, Dilator ) Muscle.

Explanation

Question 27 of 33

Miosis requires relaxation of the Sympathetic NS and activation of the Parasympathetic NS.

Select one of the following:

True
False

Explanation

Question 28 of 33

Miosis requires activation of the Sympathetic NS and relaxation of the Parasympathetic NS.

Select one of the following:

True
False

Explanation

Question 29 of 33

Mydriasis can be caused by which of the following?

Select one of the following:

Pupillary Light Reflex responding to decreased light entering the eye.
Pupillary Light Reflex responding to increased light entering the eye.
Accommodation Reflex
Parasympathetic Activation

Explanation

Question 30 of 33

The Accommodation Reflex...

Select one of the following:

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

Explanation

Question 31 of 33

The following are possible causes for which condition?

-Horner’s Syndrome
-Oculomotor Palsy
-Myasthenia Gravis

Select one of the following:

Ptosis
Pseudoptosis
Miosis
Mydriasis
Optokinetic Nystagmus

Explanation

Question 32 of 33

Which of the following describe Optokinetic Nystagmus?

Select one or more of the following:

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

Explanation

Question 33 of 33

Select from the dropdown list to complete the text.

( Vestibulo-Ocular Reflex, Optokinetic Nystagmus, Pseudoptosis ) stabilizes the eyes on a visual image during head and body movements

Explanation

Check answer

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	Created by Ben Williams over 7 years ago

Neuroscience (Exam 3) Quiz on Ch 13 Brainstem 2 - Eye Movements & Pupillary Control, created by Ben Williams on 20/03/2017.

Ch 13 Brainstem 2 - Eye Movements & Pupillary Control

Question 1 of 33

Which muscles are innervated by CN III - Occulomotor n.?

Select one or more of the following:

Explanation

Question 2 of 33

Which muscles are innervated by CN IV - Trochlear n.?

Select one or more of the following:

Explanation

Question 3 of 33

Which muscles are innervated by CN VI - Abducens n.?

Select one or more of the following:

Explanation

Question 4 of 33

AD-Duction

Select one of the following:

Explanation

Question 5 of 33

Depression and Extorsion; Depression increases with AB-Duction

Select one of the following:

Explanation

Question 6 of 33

Elevation and Intorsion; Elevation Increases with AB-Duction

Select one of the following:

Explanation

Question 7 of 33

Elevation and Extorsion; Elevation increases with AD-Duction

Select one of the following:

Explanation

Question 8 of 33

Depression and Intorsion; Depression increases with AD-Duction

Select one of the following:

Explanation

Question 9 of 33

AB-Duction

Select one of the following:

Explanation

Question 10 of 33

Oculomotor Palsy is characterized by which form of double vision?

Select one of the following:

Explanation

Question 11 of 33

Trochlear Palsy is characterized by which form of double vision?

Select one of the following:

Explanation

Question 12 of 33

Abducens Palsy is characterized by which form of double vision?

Select one of the following:

Explanation

Question 13 of 33

Label the Image depicting the pathways controlling horizontal eye movements.

Drag an answer into the correct orange point.

Explanation

Question 14 of 33

What are the symptoms of Lesion 1?

Select one of the following:

Explanation

Question 15 of 33

What are the symptoms of Lesion 2?

Select one of the following:

Explanation

Question 16 of 33

What are the symptoms of Lesion 3?

Select one of the following:

Explanation

Question 17 of 33

What are the symptoms of Lesion 4?

Select one of the following:

Explanation

Question 18 of 33

What are the symptoms of Lesion 5?

Select one of the following:

Explanation

Question 19 of 33

Select from the dropdown lists to complete the text.

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 Oculomotor Trochlear Abducens( Oculomotor, Trochlear, Abducens ) Nuclei and corresponds to CN III IV VI( III, IV, VI ).

Explanation

Question 20 of 33

Select from the dropdown lists to complete the text.

Depression and Extorsion;
Depression increases with AB-Duction

Elevation and Intorsion;
Elevation Increases with AB-Duction

Elevation and Extorsion;
Elevation increases with AD-Duction

Depression and Intorsion;
Depression increases with AD-Duction

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 ( Oculomotor, Trochlear, Abducens ) Nuclei and corresponds to CN ( III, IV, VI ).

The nuclei located in the Lower Midbrain at the level of the Inferior Colliculi and the decussation of the Superior Cerebellar Peduncle is the ( Trochlear, Oculomotor, Abducens ) Nuclei which corresponds with CN ( IV, III, VI ).

The nucleus located in the Floor of 4th Ventricle under the Facial Colliculi in the Mid-to-lower Pons is the ( Abducens, Trochlear, Oculomotor ) Nucleus which corresponds to CN ( VI, III, IV ).

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

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

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?

The following are possible causes for which condition?

-Horner’s Syndrome
-Oculomotor Palsy
-Myasthenia Gravis

( Vestibulo-Ocular Reflex, Optokinetic Nystagmus, Pseudoptosis ) stabilizes the eyes on a visual image during head and body movements