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Upper Motor Neuron (UMN) lesions are lesions occurring anywhere in the CNS from the brain up
neurotransmitter cause ... cause very different ... UMN lesions are ... This lesion causes ... @DharSaty #UMN
Amyotrophic Lateral Sclerosis (ALS) Summary
ALS: combination of the clinical examination finding of amyotrophy with the pathologic
involving both UMN ... - Causes progressive ... sclerosis with pure UMN ... Escorial criteria uses ... evidence of both UMN
Left Tongue Deviation caused by UMN XII palsy

Looks can be deceiving. The UMN innervation of most
Tongue Deviation caused ... by UMN XII palsy ... The UMN innervation ... CT brain ⬇️ Dx- UMN ... Tongue #Deviation #UMN
Generalized Weakness - Differential Diagnosis Framework
"l feel weak":
 • Infectious: Influenza, EBV, PNA, Bacteremia, Sepsis
 •
Infection • Neuro: UMN ... stroke, tumor), LMN ... Differential #Diagnosis #causes
Rossolimo's Reflex on Physical Exam - Babinski Equivalent
Rossolimo's sign is a clinical sign in which percussion
tips of the toes causes ... clinical #neurology #UMN
Stransky's Sign on Physical Exam - Babinski Equivalent
Stransky's sign is a clinical sign in which vigorous
the little toe causes ... clinical #neurology #UMN
Stransky's Sign on Physical Exam - Babinski Equivalent
Stransky's sign is a clinical sign in which vigorous
the little toe causes ... clinical #neurology #UMN
Spinal Cord Disorders - Differential Diagnosis Framework

Spinal cord neurological lesion:
Clinical findings:
 • Symptoms and signs below
Non-compressive Spinal Cord Causes ... : Areflexia UMN ... plantar response LMN
Incomplete spinal cord syndromes (ISCS)
 • Central - Small Lesion - Suspended sensory deficit, classic cape
Disproportionate motor (UMN ... Ipsilateral weakness (UMN ... small band of LMN ... paraparesis (mixed UMN ... and LMN types)
Bilateral LMN palsy with tongue weakness, wasting and fasciculations.  →  Bulbar motor Neuron disease

Note
Bilateral LMN palsy ... differentiates this from an UMN ... fasciculations #LMN