NPTEFF UMN / LMN Lesions

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Last updated 10:30 PM on 9/6/26
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7 Terms

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Name the big 4 of UMN disorders

CVA, MS, SCI, TBI

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Name the big 4 of LMN disorders

GBS, peripheral neuropathy, radiculopathy, poliovirus

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Tone: UMN vs LMN

UMN: Hypertonic: velocity dependent (spastic)


LMN: Hyptonic, flaccid, nor velocity dependent

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Reflexes: UMN vs LMN

UMN: Hyperreflexia; clonus (rhythmic motion occurs following maintained stretch). + babinski


LMN: hypoflexia, diminished DTR

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Involuntary movement: UMN vs LMN

UMN: Muscle spasms or spasticity.

LMN: fasciculations

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Muscle Bulk: UMN vs LMN

UMN: disuse atrophy that develops in weeks to months. Widespread atrophy to antigravity muscles

LMN: Neurogenic atrophy (rapid occurrence, 2-3weeks). Focal atrophy

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