Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
21 Cards in this Set
- Front
- Back
|
Vestibulocerebellum = ?
effect of lesion |
Flocculo-nodular lobe = concerned with maintaining equilibrium + adjustment of anti-gravity muscles during movement.
lesion = Disequilibrium – movement relative to gravity. |
|
|
Spinocerebellum = ?
effect of lesion |
Anterior lobe + Vermis of Posterior lobe = postural reflexes; integration of axial and limb musculature with proper equilibrium.
lesion = Ataxia – discoordination of gait and/or reaching. |
|
|
Neocerebellum = ?
effect of lesion |
Pontocerebellum = voluntary movement, smoothing fine voluntary movements of distal musculature on top of proper equilibrium and posture.
lesion = Intention Tremor; Dysmetria - problems targeting with arms or legs; cognitive and emotional discoordination |
|
|
5 cell types of cerebellum?
|
Granule Cells
Purkinje Cells Golgi Cells Basket Cells Stellate Cells |
|
|
Input Fiber Types of cerebellum
|
Climbing Fibers
(Inferior Olive) Mossy Fibers (All others, eg. Pons) |
|
|
output fiber type of cerebellum
|
Purkinje Cell
|
|
|
only excitatory neuron of cerebellar cortex?
|
granule cells
|
|
|
Vestibulocerebellum:
Inputs? Outputs? |
Inputs = Vestibular apparatus via vestibular nerve fibers; enter via ICP
Outputs = Fastigial nucleus to vestibular nuclei *Regulate vestibulospinal tract |
|
|
Spinocerebellum:
Inputs? outputs? |
Inputs = Muscle spindles and GTOs to spinocerebellar or cuneocerebellar tracts; enter via ICP or SCP
Outputs = Globose + emboliform nuclei to contralateral red nucleus via SCP *Regulate rubrospinal tract |
|
|
Neocerebellum:
Inputs? Outputs? |
Inputs = From all sensory modalities after processing in cerebral cortex; Collaterals of corticospinal tract → pontine nuclei → contralateral cerebellum via MCP
Outputs = Dentate nucleus to contralateral VL via SCP → fibers project to motor + premotor cortices *Regulate corticospinal tract |
|
|
Inferior Cerebellar Peduncle (ICP) Afferents
|
Afferents: Clarkes Column (Dorsal Spinocerebellar Tract), External Cuneate Nucleus (Cuneocerebellar Fibers), Spinal Nuc V (Trigeminocerebellar), Inferior Olive, Reticular Formation, Vestibular Nucleus & Vestibular Nerve.
|
|
|
Inferior Cerebellar Peduncle (ICP) Efferents?
|
Efferents to Vestibular Nuc & Reticular Form from Fastigial & Vestibulocerebellum.
|
|
|
Middle Cerebellar Peduncle (MCP) Afferents
|
Afferents from the Pontine Nuclei.
|
|
|
Middle Cerebellar Peduncle (MCP) efferents
|
none
|
|
|
Superior Cerebellar Peduncle (SCP) Afferents ?
|
Afferents from Spinal Cord - Ventral Spinocerebellar Tract
|
|
|
Superior Cerebellar Peduncle (SCP) Efferents ?
|
Efferents to Red Nucleus & VA/VL of Thalamus (dentatorubrothalamic tract)
|
|
|
Peripheral Nerve Transection causes
|
Flaccid paralysis with atrophy
|
|
|
Spinal Cord Transection causes
|
paralysis with hyperreflexia and no atrophy
|
|
|
pyramidal syndrome - motor cortex causes
|
moderate contralateral hemiparesis, hyperreflexia, spasicity
|
|
|
pyramidal syndrome - internal capsule
|
dense contralateral hemiparesis, hyperreflexia, spasicity
|
|
|
extrapyramidal syndrome - basal ganglia
|
Involuntary Movements, Tremor, Dystonia & Akinesia
|
