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Cerebellum S2M1
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Akinesia
Absence or poor movement
Dyskinseia
Fragmentary or incomplete movements
Dystonia
Disordered tonicity of muscles
Dysmetria
Inproper measuring of distance in muscular acts
Dysdiadochokinesia
Impairment of the ability to perform rapid altering movements
What is the function of the anterior lobe of the cerebellum
Adjusts ongoing movements and regulates muscle tone
What is the main input of the anterior lobe of the cerebellum
Spinocerebellar tracts
What is the role of the posterior lobe of the cerebellum
Coordinates planning of movements
What is the main input into the Posterior lobe of the cerebellum
Sensory and motor cortices
What is the role of the Flocculo-nodular lobe of the cerebellum
Controls balance and eye movements
What is the primary input to the Flocculo-nodular lobe of the cerebellum
Semicircular canals and the vestibular nuclei
What are the four different nuclei in the cerebellum from external to internal
Dentate
Emboliform
Globose
Fastigial
"Don't Eat Greasy Food"
What are the layers of the cerebellum
Molecular layer
Purkinje layer
Granule layer
What are the 5 different Neuronal types on the cerebellum
Stellate cells
Basket cells
Purkinje cells
Golgi cells
Granule cells
What is the only cell in the cerebellum that is an output cell
Purkinje the rest are local circuit neurons
What does the granule cell synapse on
Excitatory on Basket, Stellate, Golgi cells, and Purkinje cell dendrites in the molecular layer
They effect all
What do the Basket cells synapse on
Inhibitory on Purkinje cell soma in the Purkinje layer
BP
What do the Stellate cells synapse on
Inhibitory on the Purkinje cell dendrites in the molecular layer
S&P 500 is in the (-)
What do the Golgi cells synapse on
Inhibitory on the mossy fibers in the Granule layer
mGM Grand
What do the Purkinje cells synapse on
Inhibitory on the Deep Cerebellar Nuclei (DCN) using GABA
They are the Major output Neuron of the cerebellar cortex
What is the only excitatory cell in the cerebellum
Granule cells
What are the two different ways that the cerebellum receives termination of afferent signals
Mossy fibers - Terminate as excitatory synapses with dendrites of granule cells "mossy ground"
Climbing Fibers - Arising only from the inferior olive and "climb" dendrites of the Purkinje cells and terminate as excitatory synapses
Mossy and climbing fibers have a common synapse where
On the Deep Cerebellar Nuclei (DCN)
What will never happen in a lesion from the cerebellum
Produce paralysis, but it will cause disequilibrium, ataxia, dysmetria, and changes to muscle tone
Anterior Spinocerebellar Tract pathway
Golgi tendon
DRG
Funiculus Gracilis
Spinal Border cells
Anterior White Commissure (cross)
Anterior Spinocerebellar Tract
Brainstem (cross)
Superior Cerebellar Peduncle
Cerebellum
What tract uses the Superior Cerebellar Peduncle
Anterior Spinocerebellar
Dorsal Spinocerebellar Tract
DRG
Fasiculus Gracilis
Clarkes Nucleus
Lateral Funiculus
Dorsal Spinocerebellar Tract
Inferior Cerebellar Peduncle
Cerebellum
What is transmitted by the Anterior Spinocerebellar Tract
Golgi tendon organs afferent information from the distal lower limbs to the cerebellum
What information does the Dorsal Spinocerebellar Tract transmit
Golgi Tendon organ and muscle spindle afferent information from the trunk and proximal lower limb to the cerebellum
Cuneocerebellar Tract pathway
Golgi Tendon
DRG
Fasciculus Cuneatus
Lateral Cuneate Nucleus
Cuneocerebellar Tract
Inferior Cerebellar Peduncle
Cerebellum
What is the general idea of the Cerebellar pathways
Cerebellum receives input from motor structures with their intended motion
Cerebellum receives extra input about the affect of the action
Cerebellum decides the appropriate action
Truncal Ataxia
Lesions to Flocculonodular lobe
Patients have drunk like gait
Perform walk the line test (Tandem Gait test) they will deviate towards the side of the lesion
Appendicular Ataxia
Lesion to the cerebellar hemispheres/ lateral zones
Affects movement of extremities
Dysdiadochokinesia
"Appendicular = appendages"
What is a test that one can perform to test Appendicular Ataxia
Finger - Nose - Finger
Patient is asked to touch his nose and then quickly touch the examiners outstretched finger alternating back and forth
If not a straight line it is positive
What is a simple action that patients with cerebellar dysfunction aren't able to perform
Pronate and Supinate
What tracts are affected in Friedrichs Ataxia
Spinocerebellar
Dorsal Columns
Corticospinal Tracts
Classical conditioning (pavlovs dogs) is partially controlled by the
Cerebellum
What three cognitive functions can be affected by a damaged cerebellum
Motor learning
Classical conditioning
Higher cognitive functions (concentration ect.)
Author
lancesadams
ID
86410
Card Set
Cerebellum S2M1
Description
Neuro
Updated
8/11/2011, 2:19:34 PM
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