cerebellum

Question 1

What is the clinical application of increased intracranial pressure on the tonsil lobule of the cerebellum

Answer 1

May descend thru foramen magnum and put pressure on the medulla which is were respiratory centers are located

Question 2

what are the lobules found in the vermis

Answer 2

Uvula and nodule with dorsolateral fissure bw them

Question 3

what are the 3 main fissures of the cerebellum

Answer 3

Horizontal (everything above sup surface)

Primary (everything above ant lobe)

Dosolateral fissure (bw uvula and nodule, everything ant is flocculonodular lobe)

Question 4

What does PICA, AICA and sup cerebellar artery supply on cerebellum

Answer 4

PICA- verbal and inf lat surface

AICA- Ventral and inf surface

Sup cere artery- Sup surface

Question 5

3 nuclei of Cerebellum

Answer 5

1. Dentate
2. Interposed (globose + emboli form)
3. Fastigial

Question 6

What is the function of the cerebellar peduncles

Answer 6

Connection bw the brainstem and cerebellum thru 3 (inf, sup and middle)

Question 7

what does the dorsal spinocerebelar tract carry

Answer 7

unconscious prop signals from trunk (inf peduncle)

Question 8

What does cunatecerebeller tract carry

Answer 8

unconsious prop from upper limb

Question 9

What does vestibulocerebeellar tract carry

Answer 9

unconscious prop of head + neck

Question 10

What does the olivocerebellar axon bundles carry

Answer 10

carries info from CL olivary nuc

Question 11

Efferent pathways of cerebellum

Answer 11

Fastigial ( to vestibular nuc)
Cerebellar reticular ( to reticular formation)
Globose emboliform (Influences IL motor)
Dentathalamatic (influences IL motor)

Question 12

3 layers of cerebellum (out to in)

Answer 12

1. Molecular (dendrites of purkinje and endings of climbing fibres from inf olivary)
2. Purkinjue
3. Granular (endings of mossy fibres from everywhere exp inf olivary)

Question 13

What is the vermis important for

Answer 13

coordinating axial muscles, shoulder muscles and hip muscles

Question 14

What is the paravermal

area important for

Answer 14

For muscles that control mvmt of limbs/hands/feet

Question 15

What is the lat most area of cerebellum important for

Answer 15

Sequential mvmt and identifying mvmt errors

Question 16

Where does the vestibulocerebellum neurocircuit occur at and what are the functions of it

Answer 16

@ flocconudular lobe

1. coronation of postural muscles/balance (extensor mm)
2. Upward path to CN 3,4,6 to keep targets in sight

Question 17

Input and efferent of Vestibulocerebellum neurocircuit

Answer 17

IN- IL vestibular ganglia + nuclei, CL inf olivary complex

Out- Vestibular nuclei directly and via fastigial

Question 18

where does the spinocerebellum neurocircuit occur and what are the man functions of it

Answer 18

@ vermis and paravermal region

1. Proprioception of IL body
2. IL assessment of movnt
3. CL flexors

Question 19

Input and efferent of Spinocerebellum circuit

Answer 19

IN- spinocerebellar tracts, cineocerebellar, trigeminocerebelar, CL inf olivary, reticuloformation

Out- Interposed nucleus (globose + emboli form) then to CL red nucleus and ventral lat thalamic nuc

Question 20

what is the function of the pontocerebellum neurocircuitary

Answer 20

Connects CL pons to cerebellum

Planning of sequential mvmts and assessment of mvmt erros

Question 21

Input and efferent of pontocerebllum circuit

Answer 21

IN- CL pontine nuclei (which is stimed by descending corticopontine tracts), CL inf olivary

Out- to dentate nucleus then CL red nucleus and ventral lat thalamic

Question 22

what would a stroke in the Floconodular lobe cause

Answer 22

Main circuit in this are is vestibulocerebellar

-pt will experience vertigo

Question 23

What would a stroke in ant lobe cause

Answer 23

Spinocerebellar circuit located here

causes motor deficits (ataxia etc)

Question 24

What would a stroke in post lobe cause

Answer 24

would affect everything except uvula + tonsils

Spacial cognition becomes faulty/ impaired visual memory/ probs w planning