Mnemonic for basis of difference: STORM Baby
Also remember: In a Lower motor neuron lesion everything lowers
| Basis of Difference (STORM Baby) | UMNL | LMNL |
| S = Strength | Lowers | Lowers |
| T = Tone | Increases (spastic) | Decreases (flaccid) |
| O = Others | Superficial reflexes absent Clonus | Fasciculations Fibrillations Reaction of degeneration |
| R = Reflexes = DTR or Deep tendon reflexes | Increased | Decreased |
| M = Muscle Mass | Slight loss only | Decreases / Atrophy |
| Baby = Babinski Sign | Positive (toe up) | Negative (toe down) |
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