Spine and Holistic Health · Module 5 · Nerve roots, dermatomes and reflexes

Nerve Roots Lab

Squeeze a root and watch its skin, muscle and reflex respond; find the root from random findings; match roots to their maps; and reason through three clinic scenarios. Nothing here is graded.

Part 1: Root Compression Simulator

Healthy rootSqueezed root and radicular painNumbness DiscBoneKey muscle
Simulator readouts
MeasureValue

Simplified teaching model. Real symptoms depend on inflammation as well as pressure, and the same squeeze can hurt one person and not another. Dermatomes are a simplified classic map that overlaps and varies between people. Severity steps are illustrative: irritation first gives radicular pain, more compression adds numbness, weakness and a smaller reflex. Thoracic roots below T1 are not shown.