Cerebellar system Flashcards
Which of the following is not a role of the cerebellum?
A. Selective activation and inhibition of specific motor programs
B. Control of the execution of motor acts
C. Maintenance of balance and posture
D. Maintenance of coordinate limb movements
E. Adjustment of motor performance
A
Which of the following manifestations is not expected in a left cerebellar lesion?
A. Dysmetria of the left hand
B. Weakness of the left arm and leg
C. Dysdiadochokinesia of the left arm
D. Poor heel-to-shin test of the left foot
E. Nystagmus with fast component to the left
B
In the entire cerebello-corticospinal axis, a cerebellar lesion causes deficits ipsilateral to the lesion because:
A. The cerebellum sends out motor fibers directly to the ipsilateral spinal cord
B. The corticospinal tract controls the contralateral cerebellum
C. The corticospinal tract controls the ipsilateral cerebellum
D. Of decussations in the cerebello-thalamic pathway and in the corticospinal tract in the medullary pyramids
E. The cerebellum controls the ipsilateral cortical motor neurons
D
Which striatal component in the basal ganglia circuit is primarily involved in controlling motor function?
A. Putamen B. Globus pallidus interna C. Globus pallidus externa D. Caudate nucleus E. Subthalamic nucleus
A
Which anatomical structure connects the cerebellum to the midbrain and cerebral hemispheres?
A. Inferior cerebellar peduncle B. Middle cerebellar peduncle C. Superior cerebellar peduncle D. Brachium pontis E. Restiform body
C
Different ways of doing a cerebellar test EXCEPT:
A. Wrist slapping test B. Romberg test C. Heel-to-shin test D. Checking for nystagmus E. Finger to nose test
B
Which statement is not correct in performing the “arm pulling test for overshooting”?
A. Student asks the patient to flex the elbow
B. The student grasps the right wrist of the patient with his right hand while placing his other hand against the patient’s shoulder
C. The student instructs the patient to pull towards his face and then abruptly releases the wrist
D. The student reported the presence of absence of overshooting
B
True statements on what you can test while patient is standing EXCEPT
A. Romberg test for cerebellar testing
B. Check for wide based gait for cerebellar lesion
C. Check for spastic gait suggestive of corticospinal tract lesion
D. Check for arm swing which is poor in Parkinson’s disease and corticospinal lesion
E. Unterberger and Fukuda testing for vestibular dysfunction
A
The cortico-ponto-cerebellar pathway decussates in the _________.
Basis pontis
The dentato-thalamic pathway decussates in the _________.
Caudal midbrain
The corticobulbar components of the pyramidal tract decussate at levels along the brainstem, whereas the corticospinal component decussates at the ____ junction level
Medullocervical
A lesion of the one cerebellar hemisphere would cause ❒ ipsilateral/❒ contralateral ataxia, whereas a lesion of the dentatothalamic tract rostral to its decussation in the midbrain would cause ❒ ipsilateral/❒ contralateral ataxia.
Ipsilateral, contralateral
In testing the stance:
A. Cerebellar ataxia is not ameliorated by
visual orientation
B. Have the patient stand in one place and
check for imbalance. This is a test of
balance, incorporating inpit from the visual,
cerebellar, proprioceptive and vestibular
systems
C. If they are able to maintain balance with
eyes open, have them close their eyes,
removing visual input. This is referred to as
the Romberg test where loss of balance
suggests impaired cerebellar function
D. A, B and C
E. A and B only
D
In testing gait, all are true EXCEPT:
A. Parkinsonan shuffling gait: lack of arm
swinging, difficulty initiating/ stopping
B. Foot drop: compensate with high stepping
C. Spastic hemiparesis: leg is flexed, foot is
plantarflexed
D. Cerebellar ataxia: unsteady, wide-based
gait, difficulty with turns, veers towards side
of lesion
C
The least helpful test in doing the cerebellar
testing
A. Checking for nystagmus
B. Finger to nose test
C. Checking for hypotonia
D. Alternating movements: thigh patting of palm
patting
E. Overshooting: arm displacement and arm
pulling test
F. Heel to shin
C
