Neuromuscular weakness
UMN:
CVA (Main)
Hemorrhagic stroke
Spinal cord disease:
Infection (Epidural Abscess (Spinal))
Infarction/ischemia
Trauma (Spinal Cord Syndromes)
Inflammation (Transverse Myelitis)
Tumor
Peripheral nerve disease:
Guillain-Barre syndrome
Tick paralysis
NMJ disease:
Botulism
Organophosphate toxicity
Lambert-Eaton myasthenic syndrome
Muscle disease:
Rhabdomyolysis
Non-neuromuscular weakness
Can't miss diagnoses:
severe infection/Sepsis (Main)
Hypoglycemia
Periodic paralysis (electrolyte disturbance, K, Mg, Ca)
Hypokalemic periodic paralysis
Thyrotoxic periodic paralysis
Respiratory failure
Emergent Diagnoses:
Symptomatic Anemia
Severe dehydration
Hypothyroidism
Malignancy
UMN:
CVA (Main)
Hemorrhagic stroke
Spinal cord disease:
Infection (Epidural Abscess (Spinal))
Infarction/ischemia
Trauma (Spinal Cord Syndromes)
Inflammation (Transverse Myelitis)
Tumor
Peripheral nerve disease:
Guillain-Barre syndrome
Tick paralysis
NMJ disease:
Botulism
Organophosphate toxicity
Lambert-Eaton myasthenic syndrome
Muscle disease:
Rhabdomyolysis
CVA (Main)
Hemorrhagic stroke
Infection (Epidural Abscess (Spinal))
Infarction/ischemia
Trauma (Spinal Cord Syndromes)
Inflammation (Transverse Myelitis)
Tumor
Guillain-Barre syndrome
Tick paralysis
Botulism
Organophosphate toxicity
Lambert-Eaton myasthenic syndrome
Rhabdomyolysis
Can't miss diagnoses:
severe infection/Sepsis (Main)
Hypoglycemia
Periodic paralysis (electrolyte disturbance, K, Mg, Ca)
Hypokalemic periodic paralysis
Thyrotoxic periodic paralysis
Respiratory failure
Emergent Diagnoses:
Symptomatic Anemia
Severe dehydration
Hypothyroidism
Malignancy
severe infection/Sepsis (Main)
Hypoglycemia
Periodic paralysis (electrolyte disturbance, K, Mg, Ca)
Hypokalemic periodic paralysis
Thyrotoxic periodic paralysis
Respiratory failure
Hypokalemic periodic paralysis
Thyrotoxic periodic paralysis
Symptomatic Anemia
Severe dehydration
Hypothyroidism
Malignancy
Cerebral palsy
Neuromuscular weakness
Hydrocephalus
UMN:
Vaughn Jackson syndrome
CVA 
Brachial plexus injury
Hemorrhagic stroke