4947520
Descripción
Test por Zoila Rojas, actualizado hace más de 1 año
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Creado por Zoila Rojas
hace más de 8 años
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Pregunta 1
Pregunta
Which of these is not a principle function of the basal ganglia
Respuesta
-
termination of movement
-
initiation of movement
-
maintenance of movement
-
sequencing movement
-
correcting movement
Pregunta 2
Pregunta
The axons of 5B pyramidal cells projects to...
Respuesta
-
basal ganglia
-
regions of the brainstem
-
hypothalamus
-
ipsilateral cortex
Pregunta 3
Pregunta
Which of these is true about structure of basal ganglia?
Respuesta
-
The VA/VL thalamus has an excitatory effect on the medial globus pallidus
-
The subthalamic nucleus has an excitatory effect on lateral globus pallidus
-
the striatum has an inhibitory effect on lateral and external globus pallidus
-
the indirect loop is responsible for maintenance of a movement
Pregunta 4
Pregunta
The substantia nigra is inhibitory on striatum.
Respuesta
- True
- False
Pregunta 5
Pregunta
Striatum is responsible for initiating and maintaining motor action.
Respuesta
- True
- False
Pregunta 6
Pregunta
The outflow of the basal ganglia is the [blank_start]globus pallidus[blank_end].
Respuesta
-
globus pallidus
Pregunta 7
Pregunta
The basal ganglia is not involved with...
Respuesta
-
sequencing movements
-
perceptual habits
-
motor habits
-
movement adjustments
Pregunta 8
Pregunta
During the termination of movement, a rat has a radioactive substance injected into striatum. The animal is sacrificed (RIP) and autoradiography is performed on brain slices. Where would labelled cells be found?
Respuesta
-
lateral and medial globus pallidus
-
medial globus pallidus
-
lateral globus pallidus
-
subthalamic nucleus
Pregunta 9
Pregunta
HRP is injected into the VA/VL thalamus of a rat. The rat is sacrificed (RIP) and its brain is sliced and the basal ganglia is imaged. Where would the labelled cells be found?
Respuesta
-
lateral globus pallidus
-
internal globus pallidus
-
cerebral cortex
-
substantia nigra
Pregunta 10
Pregunta
Damage to striatum...
Respuesta
-
as in hungtington's results in chorea on the contralateral sides
-
unilaterally results in excessive motor activity on contralateral side
-
results in ballistic motor actions on the contralateral side
-
results in resting tremor
Pregunta 11
Pregunta
Which of these is true about the substantia nigra?
Respuesta
-
damage to the pars reticulata results in parkinson's like deficits
-
the internal globus pallidus excites the substantia nigra
-
damage to substantia nigra produces intention tremor
-
the substantia nigra has an inhibitory and excitatory effect on striatum
Pregunta 12
Pregunta
Which of these is not a result of damage to the substantia nigra?
Respuesta
-
chorea
-
ballistic motor movement
-
intention tremor
-
dysmetria
-
none of these are true
Pregunta 13
Pregunta
Parkinson's disease is a result of damage to doparminergic receptors on the striatum.
Respuesta
- True
- False
Pregunta 14
Pregunta
The subthalamic side loop and indirect loop have an inhibitory effect on motor output.
Respuesta
- True
- False
Pregunta 15
Pregunta
A rat with left hemiballismus has HRP injected into the affected internal globus pallidus. Which of these is true?
Respuesta
-
the right substantia nigra will be tagged
-
the right subthalamic nucleus will be tagged
-
the right striatum will be tagged
-
the rat will exhibit a resting tremor
Pregunta 16
Pregunta
The vestibular system and inferior olivary nuclei both send and receive information to and from the cerebellum.
Respuesta
- True
- False
Pregunta 17
Pregunta
Which of these does not receive information from the cerebellum?
Respuesta
-
inferior olivary nuclei
-
VL thalamus
-
vestibular system
-
red nucleus
Pregunta 18
Pregunta
A cut is made on the right superior cerebellar peduncle. Which of these would be true?
Respuesta
-
Axons from the left dentate nuclei would degenerate
-
axons from right VL thalamus to motor cortex would degenerate
-
axons going to the right red nucleus would degenerate
-
axons going to the left VL thalamus would degenerate
Pregunta 19
Pregunta
A radioactive substance is injected into the pontine nuclei of a rat. The rat is sacrificed (RIP) and brain slices are imaged. What structures would be tagged?
Respuesta
-
axons in ipsilateral middle cerebellar penduncle
-
axons in contralateral middle cerebellar peduncle
-
axons on ipsilateral motor cortex
-
axons on contralateral motor cortex
Pregunta 20
Pregunta
HRP is injected into the deep nuclei of the cerebellum of a rat. The rat is sacrificed (RIP) and brain slices are imaged. What structures would not be tagged?
Respuesta
-
spino-cebellar tract
-
inferior olivary nucleus
-
vestibular nuclei
-
pontine nuclei
-
red nucleus
Pregunta 21
Pregunta
The cerebellar cortex and deep nuclei receive information via the inferior cerebellar peduncle and middle cerebellar peduncle.
Respuesta
- True
- False
Pregunta 22
Pregunta
Niacin deficiency results in degeneration of what structure?
Respuesta
-
posterior lobe of cerebellum
-
anterior lobe of cerebellum
-
flocculonodular lobe of cerebellum
Pregunta 23
Pregunta
Which region of the cerebellum receives massive input from vestibular system?
Respuesta
-
flocculonodular lobe
-
vermis + intermediate zone
-
neocerebellar
-
deep nuclei
Pregunta 24
Pregunta
Loss of coordination in axial musculature may occur due to damage in the neocerebellum.
Respuesta
- True
- False
Pregunta 25
Pregunta
The functional zone that receives the greatest amount of information from the cerebral cortex is the [blank_start]neocerebellum[blank_end].
Respuesta
-
neocerebellum
Pregunta 26
Pregunta
The principal output component of the cerebellum are the deep nuclei.
Respuesta
- True
- False
Pregunta 27
Pregunta
Which of these is true about the basic circuit of the cerebellum?
Respuesta
-
Granular cells send output to the pontine nuclei and inferior olivary nuclei.
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Purkinje cells send output to granular cells
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Deep nuclei receive input from vestibular nuclei and spinocerebellar
-
the cerebellar cortex is facilitatory on the output of the deep nuclei
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