Cerebellum Part 1

Question 1

The cerebellum and basal ganglia are part of a modulation system that influences the descending motor systems without projecting _______ to the periphery

Answer 1

directly

Question 2

T/F: cerebellar output is largely crossed

Answer 2

False: uncrossed

Question 3

List a few functions of the cerebellum

Answer 3

planning movement, maintenance of normal muscle tone and body post, regulation of eye movement

Question 4

he cerebellum is _____ to the cerebral hemispheres and ______ to the brainstem

Answer 4

inferior;dorsal (posterior)

Question 5

T/F: Superior – carries mainly outputs from the cerebellum

Answer 5

true

Question 6

T/F: The intermediate zone is important for planning the motor program for the extremities and the lateral zone is important for control of limb muscles in the arms and legs

Answer 6

False

Question 7

the vermis influences the _____ motor system

Answer 7

Medial

Question 8

the Flocculonodular lobe influences the ____

Answer 8

medial longitudinal fasciculus

Question 9

From top to bottom, list the cerebellar structures: anterior lobe, ______ fissure, posterior lobe _______ fissure

Answer 9

primary fissure:; posterolateral fissure

Question 10

List the Cerebellar micro-structure: deep nuclei

Answer 10

fastigial, globose, emboliform, dentate

Question 11

The vermis sends projections to the ____ nucleus

Answer 11

fastigial

Question 12

The interposed nucleus consists of both the _____ and_____

Answer 12

(emboliform and globose)

Question 13

The Molecular cell layer consists of dendrites of the ______ cells

Answer 13

Purkinje

Question 14

Climbing fibres originate from ? inferior olivary nucleus

Answer 14

inferior olivary nucleus

Question 15

Mossy fibers climb up and excite ?

Answer 15

granule cells.

Question 16

T/F: all outputs are carried by axons of Purkinje cells into cerebellar grey matter.

Answer 16

False: white matter

Question 17

axons of Purkinje cells form excitatory or inhibitory synapses onto deep cerebellar nuclei and vestibular nuclei?

Answer 17

inhibitory

Question 18

outputs from cerebellum to other regions excitatory or inhibitory synapses

Answer 18

excitatory

Question 19

cerebellum is supplied by 3 branches of the

vertebral/basilar artery system. List the 3:

Answer 19

• posterior inferior cerebellar artery
  • anterior inferior cerebellar artery
  • superior cerebellar artery

Question 20

Cerebellum is important for ______ and _____ of muscle contractions

Answer 20

scaling;timing

Question 21

Truncal ataxia – occurs with lesions to:

Answer 21

vermis

Question 22

Dysdiadochokinesia: inability to do ?

Answer 22

rapid alternating movements

Question 23

Define Dysrhythmia:

Answer 23

abnormal rhythm and timing of movements

Question 24

What are some features of Truncal ataxia

Answer 24

wide-based, unsteady, “drunk-like” gait, titubation

Question 25

Inputs to cerebellum originate from: spinal cord via which tract?

Answer 25

spinocerebellar tracts

Question 26

T/F: Input to (superior and output from (middle, inferior) ) the cerebellum is via the cerebellar peduncles

Answer 26

False

Question 27

Dorsal spinocerebellar tract carries proprioceptive information about limb movement from:

Answer 27

lower extremities

Question 28

T/F: Dorsal spinocerebellar tract synapse in nucleus dorsalis of Clark

Answer 28

true

Question 29

the Dorsal spinocerebellar tract enters the superior or inferior cerebellar peduncle

Answer 29

inferior

Question 30

Cuneocerebellar tract receives proprioceptive information from?

Answer 30

upper limb and upper thorax

Question 31

which tract has fibres that synapse in the external cuneate nucleus

Answer 31

Cuneocerebellar tract