Semester 2 Neuro, Quiz 2 - Cerebellum | Attempts: 3799

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1/9 Questions

A 70-year old man with a history of hypertension went to work and had sudden onset of nausea and vomiting. He was taken to ER, where his exam was notable for slurred speech, dysmetria on finger-to-nose testing on the left side. His gait was normal. Where is the lesion?
- Cerebellar vermis
- Right cerebellar hemisphere
- Left cerebellar hemisphere
- Fastigial nucleus
- Vestibular nuclei

About This Quiz

This quiz, titled 'Semester 2 Neuro, Quiz 2 - Cerebellum', assesses knowledge on cerebellar functions and pathologies. It covers clinical scenarios, anatomical understanding, and neurophysiological concepts, essential for medical students and professionals in neurology.

Semester 2 Neuro, Quiz 2 - Cerebellum - Quiz

2.

A 45-year-old man was admitted to the hospital with a cerebellar hemorrhage. The patient exhibited an unsteady "drunk like" gait and the physician noted that he swayed while entering the examination room. Which region of the cerebellum was most likely affected by the bleed?
- Hemispheres of the anterior lobe
- Hemisphere of the posterior lobe
- Interposed nuclei
- Dentate nucleus
- Flocculonodular lobe
Correct Answer

A. Flocculonodular lobe

Explanation

The patient's unsteady and "drunk like" gait, as well as swaying while entering the examination room, suggest dysfunction in the vestibulocerebellum, which is responsible for balance and coordination. The vestibulocerebellum is located in the flocculonodular lobe of the cerebellum. Therefore, the most likely region affected by the cerebellar hemorrhage in this case is the flocculonodular lobe.

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3
3.

Dysdiadokmesia refers to which of the following?
- Inability to perform the Tandem-Gait test
- Inability to stand without swaying with eyes open
- Inability to control distance, power or speed of a movement
- Inability to control vestibulo-ocular reflexes
- Inability to perform rapid alternating movements with the hands
Correct Answer

A. Inability to perform rapid alternating movements with the hands

Explanation

Dysdiadokokinesia refers to the inability to perform rapid alternating movements with the hands. This condition is commonly observed in neurological disorders such as cerebellar dysfunction or lesions. It is characterized by a lack of coordination and smoothness in movements, making it difficult for individuals to perform tasks that require rapid and alternating movements, such as playing a musical instrument or clapping hands.

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2
4.

Concerning the circuitry between mossy fibers, climbing fibers and cells of the cerebellar cortex, which of the following pairs both provide excitatory input?
- Mossy fibers & Purkinje cells
- Purkinje cells & Golgi cells
- Granule cell parallel fibers & Mossy fibers
- Golgi cells & Climbing fibers
- Climbing fibers & Basket cells
Correct Answer

A. Granule cell parallel fibers & Mossy fibers

Explanation

Granule cell parallel fibers and mossy fibers both provide excitatory input. The granule cell parallel fibers are axons of granule cells in the cerebellar cortex that run parallel to each other. Mossy fibers, on the other hand, are axons that originate from various brain regions and carry sensory information to the cerebellum. Both of these fiber types release excitatory neurotransmitters onto their target cells, which leads to the activation and excitation of these cells. Therefore, the correct answer is Granule cell parallel fibers & Mossy fibers.

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1
5.

As a researcher studying the circuitry of the cerebellum, which of the following nuclei do you wish to lesion if you are focusing mainly on the flocculo-nodular lobe circuitry of the cerebellum?
- Fastigial nucleus
- Dentate nucleus
- Clarkes nucleus
- Spinal border cells
- Globose nucleus
Correct Answer

A. Fastigial nucleus

Explanation

The researcher would wish to lesion the Fastigial nucleus if they are focusing mainly on the flocculo-nodular lobe circuitry of the cerebellum. This is because the Fastigial nucleus is primarily involved in the control of eye movements and balance, which are key functions of the flocculo-nodular lobe. Lesioning the Fastigial nucleus would allow the researcher to study the specific effects on these functions and understand the circuitry of the cerebellum involved in them.

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2
6.

Your 27-year old patient displays ataxia when asked to walk across the examination room. You ask him to stand still with his eyes closed and note marked swaying back and forth. When he opens his eyes the swaying persists. Vibration sense is normal on all four limbs. Given the clinical picture in this case, such ataxia is likely due to damage to which of the following structures?
- Dorsal columns
- Cerebral peduncles
- Posterior limb of the internal capsule
- Ventral horns of the spinal cord
- Cerebellum
Correct Answer

A. Cerebellum

Explanation

The patient's ataxia, characterized by marked swaying back and forth, suggests dysfunction in the cerebellum. The cerebellum plays a crucial role in coordinating movements and maintaining balance. The fact that the swaying persists even when the patient opens his eyes indicates that the problem lies within the cerebellum rather than the sensory input from the eyes. The other structures listed, such as the dorsal columns, cerebral peduncles, posterior limb of the internal capsule, and ventral horns of the spinal cord, are not typically associated with these specific symptoms.

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2
7.

Efferent axons from the dentate nucleus terminate in what thalamic nucleus and travel through what peduncle?
- Ventral anterior nucleus of the thalamus (VA) ---superior cerebellar peduncle
- Ventral anterior nucleus of the thalamus (VA) ---middle cerebellar peduncle
- Ventral lateral nucleus of the thalamus (VL) ---superior cerebellar peduncle
- Ventral lateral nucleus of the thalamus (VL) ---middle cerebellar peduncle
- Ventral posterolateral nucleus of the thalamus (VPL) ---superior cerebellar peduncle
Correct Answer

A. Ventral lateral nucleus of the thalamus (VL) ---superior cerebellar peduncle

Explanation

Efferent axons from the dentate nucleus terminate in the Ventral lateral nucleus of the thalamus (VL) and travel through the superior cerebellar peduncle.

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8.

As a researcher studying the circuitry of the cerebellum, which of the following nuclei do you know to be the major output neuron of the cerebellar cortex?
- Purkinje cells
- Dentate nucleus
- Fastigial nucleus
- Clarke's nucleus
- Spinal border cells
Correct Answer

A. Purkinje cells

Explanation

Purkinje cells are known to be the major output neurons of the cerebellar cortex. They receive inputs from various sources within the cerebellum and send their axons to the deep cerebellar nuclei, which then project to other parts of the brain. Purkinje cells play a crucial role in coordinating motor movements and are involved in the regulation of balance, posture, and coordination. Their distinctive morphology and connectivity make them well-suited for integrating and modulating signals within the cerebellum.

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9.

Which of the following ascending pathways enters the cerebellum through the peduncle marked in the picture?
- Dorsal spinocerebellar tract
- Cuneo cerebellar tract
- Anterior spinocerebellar tract
- Ponto cerebellar fibers
- Climbing fibers
Correct Answer

A. Anterior spinocerebellar tract

Explanation

The correct answer is the anterior spinocerebellar tract. This ascending pathway enters the cerebellum through the peduncle marked in the picture. The other options listed are not associated with this specific peduncle.

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2

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Jan 24, 2012

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Semester 2 Neuro, Quiz 2 - Cerebellum

A 70-year old man with a history of hypertension went to work and had sudden onset of nausea and vomiting. He was taken to ER, where his exam was notable for slurred speech, dysmetria on finger-to-nose testing on the left side. His gait was normal. Where is the lesion?

Quiz Preview

A 45-year-old man was admitted to the hospital with a cerebellar hemorrhage. The patient exhibited an unsteady "drunk like" gait and the physician noted that he swayed while entering the examination room. Which region of the cerebellum was most likely affected by the bleed?

Dysdiadokmesia refers to which of the following?

Concerning the circuitry between mossy fibers, climbing fibers and cells of the cerebellar cortex, which of the following pairs both provide excitatory input?

As a researcher studying the circuitry of the cerebellum, which of the following nuclei do you wish to lesion if you are focusing mainly on the flocculo-nodular lobe circuitry of the cerebellum?

Efferent axons from the dentate nucleus terminate in what thalamic nucleus and travel through what peduncle?

As a researcher studying the circuitry of the cerebellum, which of the following nuclei do you know to be the major output neuron of the cerebellar cortex?

Which of the following ascending pathways enters the cerebellum through the peduncle marked in the picture?