Basal Nuclei/Cerebellum Poll Everywhere

The corpus striatum consists of:

Caudate and putamen

Caudate, putamen, and globus pallidus

Putamen, globus pallidus and substantia nigra

Caudate, subthalamic nucleus, and substantia nigra

Substantia nigra and subthalamic nucleus

Caudate, putamen, and globus pallidus

What is marked?

globus pallidus

What is marked?

Head of the Caudate nucleus

Activation of the basal nuclei direct pathway caused increased motor cortex activity and increased movement (1True/1False)

1True

A hyperkinetic movement disorder which has slow, writhing, snake-like movements is called:

Athetoid movements

Choreiform movements

Contralateral hemiballism

Hypotonia

None of the above

Athetoid movements

A lesion to the subthalamic nucleus will result in:

Athetoid movements

Choreiform movements

Contralateral hemiballism

Contralateral hemiballism

Which CNS structure(s) is initially affected in Huntington's disease?

Globus pallidus

Substantia nigra

Subthalamic nucleus

Striatum

Lentiform nucleus

Striatum

Name the clinical condition when structure "A" is lesioned.

Parkinson’s disease

What is marked?

cerebellar tonsils

What is marked?

vermis

Which cerebellar neuron sends inhibitory output to the deep cerebellar nuclei?

Granule cells

Basket cells

Stellate cells

Purkinje cells

None of the above

Purkinje cells

A 59 year old patient presents with trunkal ataxia. Which cerebellar functional zone has been lesioned?

Pontocerebellum

Spinocerebellum

Vestibulocerebellum

None of the above

Ataxia

Jerky, inaccurate movements

Hypotonia

Decreased muscle tone and deep tendon reflexes

Dyssnergia

Deterioration and decomposition of coordinated movement

Dysmetria

Past pointing by over or under shooting the target

Dysdiadochokinesia

Awkward performance of rapidly alternating movements

An intention tremor is caused by a cerebellar lesion (2True/2False)

2True

The superior cerebellar artery supplies the superior surface of the cerebellum (3True/3False)

3True

Gamma motor neurons innervate intrafusal muscle fibers to maintain muscle tone (4True/4False)

4True

Which motor neuronal pathways excite the antigravity muscles

Reticulospinal tracts

Vestibulospinal tracts

Rubrospinal tracts

Tectospinal tracts

Reticulospinal tracts and Vestibulospinal tracts

Which motor pathway activates the flexors of the upper extremity?

Reticulospinal tracts

Rubrospinal tracts

Tectospinal tracts

Vestibulospinal tracts

None of the above

Rubrospinal tracts

The lateral premotor cortex is involved in:

Sensorimotor integration

Fine control of individual muscle movement

Initiating and coordinating internally generated movements

None of the above

Sensorimotor integration

A patient with decorticate rigidity has a lesion located:

Above the red nucleus

Below the red nucleus

Above the red nucleus

Your 65 year old patient is unable to close their mouth or smile on the left side of their face. They are able to raise their eyebrows and close their eyelids bilaterally. What structure has been lesioned?

Facial motor nucleus on the left side

CN VII on the left side

Corticobulbar tracts on the right side

Corticospinal tracts on the left side

None of the above

Corticobulbar tracts on the right side

Your 23 year old patient's tongue deviates to the right when protruded. You inspect the surface of the tongue and note that there is NO atrophy of the tongue muscles. What structure has been damaged?

Hypoglossal nucleus on the right

Hypoglossal nucleus on the left

Corticobulbar tracts on the left

Corticospinal tracts on the right

None of the above

Corticobulbar tracts on the left