Le Cervelet Flashcards

1
Q

Cervelet generalites

A

+ vol. Apres HC (8-10cm larg /5-6cm diam

2Hcere + vermis

X fissures transversales : lamelles cervelet
Pedoncules cere => TC

Subdivisions:
Cervelet cerebral
Cervelet spinal
Lobe flocullo nodulaire

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2
Q

Cortex cerebelleux

A

3couches:
Moleculaire (cell etoilees + en corbeille)
Piriforme (cell purkinje , Golgi)
Des grains = granulaire, en corbeille

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3
Q

Afferences cortex cerebelleux

A
  • fibres grimpantes =n.olivaires=voies extra P

* fibres moussues= ME, subs reti.A (couche cell)

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4
Q

Efference cortex cere.

A

Axones cell Purkinje (centraux)

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5
Q

Interneurones cortex cerebelleux

A

Cell corbeille, etoiless, golgi

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6
Q

Patho du cervelet

A

Trblt d’intention
Mauvaise appreciation force pr mvt(sr ou ss estime)
Trble coord mot ou posture = -> ataxie cerebelleuse (arc a gauche)

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7
Q

Aff cervelet cerebral

A

Fibres cortico-pontique

Fibres pontocetebelleuses

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8
Q

Eff cervelet cerebral

A

Ny dentelé
Ny rouge
Controle voies extraP

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9
Q

Cervelet cerebral

A

Thalamus = aire mot 1aire = controle voies pYRa

Comparateur entre projet mot et mvt realise

Fonction ajustement

Programateur

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10
Q

Asynergie

A

-tbkes mvts volontaires = perte orga tempo-spatiale
Decomposition mvt pluriarticulaire en mvts mono arti successifs

Defaut coord

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11
Q

Aff cervelet spinal

A

Fsc spino-cerebelleux direct (mem sup)

Fsc spino cerebelleux croise(membre inf)

Fsc olivo-cerebelleux (face palais pharynx)

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12
Q

Eff cervelet spinal

A

Ny globulus + embolus (rge, subst reticulee -> voies extraP)

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13
Q

Cervelet spinal

A

Maintien posture
Mot volontaire
Tonus muscu

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14
Q

Cervelet et stabilisation posturale

A

Ture ressort -> tronc devrait etre devant
Or : anticipation mvt = contraction muscu miscle gastrocnemien

Aires premot vers contractions biceps, en parallele vers cervelet cere puis spinal extraP puis contraction gastro

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15
Q

Aff lobe flocculo nod

A

Vestibulaire,visu +proprioceptives

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16
Q

Eff flocculo nod

A

Ny fastigal -> ny vesti -> voies mot extraP OU vers voies mot vesti-oculaires

17
Q

Lobe flocculo nodulaire (vestibulaire)

A

Reaction posturale
Mvts conjugues tete yeux

Lesions = tbles de l’equilibre
Elargissement polygone sustension
Marche ebrieuse
Bras ecartes
Demi tour diff
Oscillation tete 
Nausee