Cerebellum Lab

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Cerebellum Lab

• jen martindale

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LONGITUDINAL ZONES
Vermis
Paramedian Zone
Lateral Zone
Anterior Lobe
HORIZONTAL ZONES (LOBES)
Primary Fissure
Posterior Lobe
Flocculonodular Lobe
Nodule
Flocculus
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Superior View of Cerebellum
Vermis
Anterior Lobe
Primary Fissure
Posterior Lobe
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Inferior View of Cerebellum
Flocculus
Tonsil
Nodule
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Side View of Cerebellum
Primary Fissure
Anterior Lobe
Flocculus
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Interposed Nucleus
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THE DEEP NUCLEI
Dendate
Emboliform
Globose
Fastigial
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The Peduncles
Superior Cerebellar Peduncle
Middle Cerebellar Peduncle
Inferior Cerebellar Peduncle
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Superior Cerebellar Peduncle
Middle Cerebellar Peduncle
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Functional Organization
Anterior Lobe
Major Input
Major Function
unconscious proprioception
Golgi Tendon Organs Muscle Spindles
regulates muscle tone
aka spinocerebellum
Posterior Lobe
aka pontocerebellum Or neocerebellum
intended vs. ongoing movt
coordinates Voluntary motor activity
Cerebral Cortex
Flocculonodular Lobe
Maintain posture and balance
Vestibular System
Vestibular info
aka vestibulocerebellum
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The Basic Circuit
Cerebellar Afferents

• Cortex (corticopontocerebellar pathway)
• GTOs, Muscle Spindles (Spinocerebellar
  pathway)
• Vestibular inputs (vestibulocerebellar pathway)
• Inferior Olives (olivocerebellar pathway)

Cerebellar Efferents

• Red Nucleus
• Vestibular Nucleus and Reticular Formation
• VA/VL of thalamus

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Afferents
1) Corticopontocerebellar Afferents
Primary, supplementary, premotor cortex
Pontine Nuclei
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Afferents
2) Olivocerebellar Pathway motor learning
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Afferents
3) Spinocerebellar Pathways unconscious
proprioceptive input
Anterior Lobe Paramedian Zone of Posterior Lobe
Trigeminocerebellar Tract
GTOs and muscle spindles from head
Cuneocerebellar Tract
GTOs and muscle spindles from upper limbs
Ventral spinocerebellar Tract
Dorsal spinocerebellar Tract
GTOs and muscle spindles from lower limbs
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Cerebellar Efferents
Spinocerebellar and Vestibular Input
Spinocerebellar input from distal limbs
Contralateral motor cortex via pontine nuclei
VL of thalamus Inferior Olive Red Nucleus
VL of thalamus Vestibular Nuclei RF
VL of thalamus Red Nucleus
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Cerebellar Efferents
Superior cerebellar decussation
Superior cerebellar peduncle at level of inferior
colliculus
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How Cerebellar Lesions Manifest Ipsilaterally
Right Side of Body Suffers
x
Right Cerebellum
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Summary of Afferents and Efferents
Primary sensory and motor cortex
Superior Cerebellar Peduncle
Middle Cerebellar Peduncle
Lateral Cerebellar Hemisphere
Pontine Nuclei
Vermis and Flocconodular Lobe
Vestibular Nucleus
Intermediate Hemisphere
Inferior Cerebellar Peduncle
Cuneocerebellar Tr
Dorsal Spinocerebellar