🔵 Cervical / Neck
Neck→Shoulder→Arm
C3–C4→Trapezius / Shoulder tip
C5–C6→Lateral arm / thumb
C7–C8→Medial arm / little finger
🟡 Thoracic / Mid-Back
T1–T4→Chest / Anterior shoulder
T4–T6→Interscapular region
T10–T12→Lower abdomen / groin
🟠 Lumbar / LSP
L1–L2→Groin / anterior thigh
L3–L4→Anterior knee / medial leg
L5→Lateral leg / dorsum foot
S1→Posterior leg / lateral foot
🟣 Hip & Pelvis
Hip→LSP / Pelvis→Groin
SIJ→Buttock→Posterior thigh
Piriformis→Sciatic distribution
🟢 Shoulder
Shoulder→Neck→Upper arm
Rotator cuff→Deltoid insertion
AC joint→C3–C4 dermatome
🔴 Visceral Referral
Heart→Left arm / jaw / chest
Liver/GB→Right shoulder tip
Kidney→Loin / groin / testis
Appendix→Periumbilical → RIF