Week 5: Cerebellum Flashcards
List the major anatomical subdivisions of the cerebellar cortex.
- Pontocerebellum
- Spinocerebellum
- Vestibulocerebellum
List the major anatomical subdivisions of the deep cerebellar nuclei.
- Dentate nucleus
- Interposed nuclei
- Fastigial nucleus
List the three lobes of the cerebellar cortex.
flocculonodular
anterior
posterior
The cerebellum receives input from where?
regions of cerebral cortex that plan and initiate skilled movements
sensory systems that monitor course of movements
True/false: The cerebellum projects to upper motor neurons.
FALSE
Corrects output of motor cortex via its thalamic connections – does not project to lower motor neurons (LMN) in BS or SC
Which of the following is a lobe of the cerebellar cortex? (select all that apply)
a. posterior
b. pontocerebellum
c. primary fissure
d. fastigial nucleus
e. flocculonodular
f. occipital
g. insular
a. posterior
e. flocculonodular
Major afferent and efferent pathways of the cerebellum form a loop between which three regions?
the cerebral cortex, brainstem and spinal cord
List the three cortical layers of the cerebellar cortex.
molecular, Purkinje cell, granule cell
Deep nuclei of the cerebellum receive excitatory input from (select all that apply):
a. Purkinje cells
b. Climbing fibers
c. Basket cells
d. Golgi cells
e. Mossy fibers
f. Granule cells
b. Climbing fibers (collateral)
e. Mossy fibers
They receive inhibitory input from Purkinje cells
True/false: Purkinje cells inhibit Golgi cells.
TRUE: Purkinje cells inhibit Golgi cells.
The flocculonodular lobe consists of what?
Nodule and flocculus
Climbing fibers come from _______ to innervate __________.
Climbing fibers come from the inferior olivary complex to innervate a single Purkinje’s proximal dendritic tree.
What is the most superficial layer of the cerebellar cortex?
– molecular
Purkinje cells receive excitatory input from (select all that apply):
a. Deep nuclei of the cerebellum
b. Climbing fibers
c. Basket cells
d. Golgi cells
e. Mossy fibers
f. Granule cells
b. Climbing fibers
f. Granule cells (with parallel fibers that innervate multiple Purkinje)
They receive inhibitory input from basket cells
Purkinje cells have axons that end in the:
a. the cerebral cortex
b. thalamus
c. brainstem
d. cerebellar nuclei
d. cerebellar nuclei
Which cerebellar peduncle contains cerebellar efferent fibers, the ventral spinocerebellar tract and tectocerebellar fibers?
a. Superior
b. Middle
c. Inferior
a. Superior cerebellar peduncle
Which of the following is NOT true regarding the vermis?
a. It is the region of the cerebellum in and near the midline
b. The superior vermis lies in a deep depression
c. The medial parts of the hemispheres beside the vermis are the paravermal zone
d. The end portion of the inferior vermis is the nodule
b. The superior vermis lies in a deep depression
Correction: the inferior vermis lies in a deep depression (the vallecula)
The synaptic zone of the cerebellar cortex is the:
a. molecular layer
b. Purkinje cell layer
c. granule cell layer
a. molecular layer
Comparative anatomy recognises three divisions of the cerebellum: the archicerebellum, the paleocerebellum and the …
Neocerebellum
Which cerebellar peduncle contains olivocerebellar and dorsal spinocerebellar fibers, and the vestibulocerellar and fastigiobulbar connections?
a. Superior
b. Middle
c. Inferior
c. Inferior cerebellar peduncle
The spinocerebellam includes consists of: (Select all that apply)
a. Vermis of the anterior lobe and the adjacent paravermal zones
b. The superior vermis in the posterior lobe
c. spinocerebellar tracts and cuneocerebellar fibers
d. The vestibular nerve and nuclei
a. Vermis of the anterior lobe and the adjacent paravermal zones
c. spinocerebellar tracts and cuneocerebellar fibers
The flocculonodular lobe receives input from:
a. The vermis
b. The vestibular nerve and nuclei
c. The pons
d. The superior cerebellar peduncle
b. The vestibular nerve and nuclei
(ipsilateral)
(via the inferior cerebellar peduncle)
Which cerebellar peduncle contains fibers from the contralateral pontine nuclei?
a. Superior
b. Middle
c. Inferior
b. Middle cerebellar peduncle
