Podcast
Questions and Answers
Lesions to the cerebellum typically result in what type of motor deficit?
Lesions to the cerebellum typically result in what type of motor deficit?
- Inaccurate movements and motor errors. (correct)
- Inability to initiate movements.
- Complete paralysis of specific muscle groups.
- Uncontrollable muscle spasms.
How does the cerebellum contribute to motor control?
How does the cerebellum contribute to motor control?
- By correcting motor errors through comparing intended and actual movements. (correct)
- By directly initiating voluntary movements.
- By relaying sensory information to the cerebral cortex.
- By regulating muscle tone and reflexes.
What is the function of the "internal models" used by the cerebellum?
What is the function of the "internal models" used by the cerebellum?
- To generate emotional responses to movement.
- To store memories of past motor actions.
- To control autonomic functions during physical activity.
- To provide a dynamic representation of the limbs and body. (correct)
How does the cerebellum update its internal models to improve motor performance?
How does the cerebellum update its internal models to improve motor performance?
What happens to smooth pursuit eye movements when there is a lesion in the left vestibulocerebellum when tracking a target moving from right to left?
What happens to smooth pursuit eye movements when there is a lesion in the left vestibulocerebellum when tracking a target moving from right to left?
What is the vestibulo-ocular reflex (VOR)?
What is the vestibulo-ocular reflex (VOR)?
In a patient with normal responses to vestibular stimulation, what happens to their ability to fixate on an object during leftward head rotation if they have a lesion in the vestibulocerebellum?
In a patient with normal responses to vestibular stimulation, what happens to their ability to fixate on an object during leftward head rotation if they have a lesion in the vestibulocerebellum?
During prism adaptation, what is the role of the cerebellum?
During prism adaptation, what is the role of the cerebellum?
What is the likely outcome for a patient with focal olivocerebellar lesions when attempting prism adaptation?
What is the likely outcome for a patient with focal olivocerebellar lesions when attempting prism adaptation?
How does the cerebellum contribute to the accuracy of voluntary movements?
How does the cerebellum contribute to the accuracy of voluntary movements?
A patient with cerebellar damage is asked to perform a rapid alternating movement, such as pronating and supinating their hand. What is the likely presentation?
A patient with cerebellar damage is asked to perform a rapid alternating movement, such as pronating and supinating their hand. What is the likely presentation?
Which of the following is NOT a primary function of the cerebellum?
Which of the following is NOT a primary function of the cerebellum?
A patient attempts to touch their nose with their finger, but their movement is hesitant, indirect, and characterized by oscillations around the intended trajectory. What is this called?
A patient attempts to touch their nose with their finger, but their movement is hesitant, indirect, and characterized by oscillations around the intended trajectory. What is this called?
In the context of motor learning, what does the cerebellum contribute by using 'internal models'?
In the context of motor learning, what does the cerebellum contribute by using 'internal models'?
A person with cerebellar dysfunction might display which of the following characteristics when speaking?
A person with cerebellar dysfunction might display which of the following characteristics when speaking?
You ask a patient to stand with their feet together and eyes closed, and they begin to sway and lose their balance. What is this most likely related to?
You ask a patient to stand with their feet together and eyes closed, and they begin to sway and lose their balance. What is this most likely related to?
What is the primary role of the cerebellum in maintaining posture?
What is the primary role of the cerebellum in maintaining posture?
If a patient has difficulty judging distances and overshoots or undershoots when reaching for objects, which condition is most likely affecting them?
If a patient has difficulty judging distances and overshoots or undershoots when reaching for objects, which condition is most likely affecting them?
Which of the following best describes the impact of cerebellar lesions on cognitive function?
Which of the following best describes the impact of cerebellar lesions on cognitive function?
Why is it important to consider the cerebellum's function when designing rehabilitation strategies for individuals with motor impairments?
Why is it important to consider the cerebellum's function when designing rehabilitation strategies for individuals with motor impairments?
Flashcards
Cerebellum Lesions
Cerebellum Lesions
Cerebellar lesions don't cause paralysis, but lead to errors in movement.
Cerebellum Role
Cerebellum Role
Area of the brain responsible for correcting motor errors.
Internal Models
Internal Models
Internal representations of body mechanics used for movement.
Vestibulocerebellum Lesion Effect
Vestibulocerebellum Lesion Effect
Signup and view all the flashcards
Study Notes
- Lesions of the cerebellum do not paralyze movement, but result in large movement errors
- The cerebellum plays a role in correcting "motor errors" by comparing the intended movement with the actual movement
- The cerebellum contains "internal models" that represents a dynamic model of the limbs
- Internal models are updated by trial and error
Vestibulocerebellum Lesions
- Lesions in the vestibulocerebellum have large effects on smooth-pursuit eye movements
- Sinusoidal target motion is tracked with smooth-pursuit eye movements as the target moves from left (L) to right (R)
- Lesion of the left vestibulocerebellum causes smooth pursuit to be punctuated by saccades when the target moves from right to left
- Patients with vestibulocerebellum lesions have normal responses to vestibular stimulation
- Object fixation is disrupted during leftward rotation
- Each trace shows the eye movements evoked by head rotation while the patient fixates on a target that moves along with him, first in the dark and then in the light
- In the dark the eyes show a normal vestibulo-ocular reflex (VOR) during rotation in both directions: The eyes move smoothly in the direction opposite to the head's rotation, then reset with saccades in the direction of head rotation
- In the light the eye position during rightward head rotation is normal: Fixation on the target is excellent and the vestibulo-ocular reflex is suppressed
- During leftward head rotation, however, the subject is unable to fixate on the object and the vestibulo-ocular reflex cannot be suppressed
Prism Adaptation
- Individuals adapt to prism glasses over time
- Patients with lesions to the olivocerebellar area are unable to adapt to prism glasses and cannot hit the target
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
