cerebellum Flashcards
(24 cards)
What is the clinical application of increased intracranial pressure on the tonsil lobule of the cerebellum
May descend thru foramen magnum and put pressure on the medulla which is were respiratory centers are located
what are the lobules found in the vermis
Uvula and nodule with dorsolateral fissure bw them
what are the 3 main fissures of the cerebellum
Horizontal (everything above sup surface)
Primary (everything above ant lobe)
Dosolateral fissure (bw uvula and nodule, everything ant is flocculonodular lobe)
What does PICA, AICA and sup cerebellar artery supply on cerebellum
PICA- verbal and inf lat surface
AICA- Ventral and inf surface
Sup cere artery- Sup surface
3 nuclei of Cerebellum
- Dentate
- Interposed (globose + emboli form)
- Fastigial
What is the function of the cerebellar peduncles
Connection bw the brainstem and cerebellum thru 3 (inf, sup and middle)
what does the dorsal spinocerebelar tract carry
unconscious prop signals from trunk (inf peduncle)
What does cunatecerebeller tract carry
unconsious prop from upper limb
What does vestibulocerebeellar tract carry
unconscious prop of head + neck
What does the olivocerebellar axon bundles carry
carries info from CL olivary nuc
Efferent pathways of cerebellum
Fastigial ( to vestibular nuc)
Cerebellar reticular ( to reticular formation)
Globose emboliform (Influences IL motor)
Dentathalamatic (influences IL motor)
3 layers of cerebellum (out to in)
- Molecular (dendrites of purkinje and endings of climbing fibres from inf olivary)
- Purkinjue
- Granular (endings of mossy fibres from everywhere exp inf olivary)
What is the vermis important for
coordinating axial muscles, shoulder muscles and hip muscles
What is the paravermal
area important for
For muscles that control mvmt of limbs/hands/feet
What is the lat most area of cerebellum important for
Sequential mvmt and identifying mvmt errors
Where does the vestibulocerebellum neurocircuit occur at and what are the functions of it
@ flocconudular lobe
- coronation of postural muscles/balance (extensor mm)
- Upward path to CN 3,4,6 to keep targets in sight
Input and efferent of Vestibulocerebellum neurocircuit
IN- IL vestibular ganglia + nuclei, CL inf olivary complex
Out- Vestibular nuclei directly and via fastigial
where does the spinocerebellum neurocircuit occur and what are the man functions of it
@ vermis and paravermal region
- Proprioception of IL body
- IL assessment of movnt
- CL flexors
Input and efferent of Spinocerebellum circuit
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
what is the function of the pontocerebellum neurocircuitary
Connects CL pons to cerebellum
Planning of sequential mvmts and assessment of mvmt erros
Input and efferent of pontocerebllum circuit
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
what would a stroke in the Floconodular lobe cause
Main circuit in this are is vestibulocerebellar
-pt will experience vertigo
What would a stroke in ant lobe cause
Spinocerebellar circuit located here
causes motor deficits (ataxia etc)
What would a stroke in post lobe cause
would affect everything except uvula + tonsils
Spacial cognition becomes faulty/ impaired visual memory/ probs w planning
