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16 Cards in this Set
- Front
- Back
Lower Motor Neuron Deficits are characterized by:
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-Enduring Flaccid Paralysis
-Rapid Muscle or Atrophy -Fasciculations of affected Muscle -Hypotonia -Hyporeflexia or Areflexia |
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Ex of Lower Motor Neuon Disease
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Polio and Amyotrophic Lateral Sclerosis
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Upper Motor Neuron Lesion symptoms
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-Spascticity
-Hypertonia -Clonus -Clasps Knide Response -Altered cutaneous reflexes including the abdominal, cremasteric, Babinski and Hoffman signs -Autonomic Dysreflexia |
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Typical upper motor neuron lesion is a lesion of the
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Pyramidal System either in Cerebral Cortex or along its pathway
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Lesions of the hypothalamospinal tract contribute to
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autonomic dysreflexia
(problems with primarily sympathetically mediated autonomic activity) |
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Lesions of the dorsal column produce loss or reduction of:
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Epicritic touch
Vibration Position sense |
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Dorsal column lesion in the spinal cord will produce functional loss ______
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Ipsilateral
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Dorsal column lesion in the medial lemniscus will produce functional loss ______
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Contralateral
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an example of a pathology that often produces degeneration in the dorsal column system
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Tabes dorsalis (neurosyphilis)
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Lesions of the anterolateral system will produce
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a contralateral loss of pain, temperature and protopathic touch sensation
-typically 1-2 segments below the lesion in the spinal cord |
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Syringomyelia
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example of an anterolateral system lesion that is often bilateral and usually affecting cervical segments 1st
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Lesion of the Spinocerebellar tracts in the spinal cord
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Do not generally produce isolated clinically distinuishable symptoms
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Neuropraxia
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the function of the axon may be disrupted without physcial injury of the axon
-like a nerve pressure block |
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Axonotmesis
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axon within a nerve is disrupted, but the connective tissue scaffold(endo, peri and epineurium) is intact
-over stretching |
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Neurotmesis
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Axons and the connective tissue structure of the nerve are both disrupted
-cutting injuries or other severe trauma |
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Neuromas
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a mass of axons and connective tissue that prevents the axon from continuing to grow towards its target. Removal of the neuroma is necessary for repair.
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