Hi,
Following are some extractions from EH. Hope this helps.

with best wishes,
V.T.Yekkirala.

[nl2 - Basaltic lava - Back and neck] During the night, burning pain on the right side near spine below ribs, like a hole going through to front, lasted about 10 minutes then moved to the solar plexus, then left side, then to chest, pain slight by this time. Right side still slightly bruised in morning. P2 7 XX. XX NS - from proving by Misha Norland.

[hr1 - Chininum arsenicosum] - As if diarrhoea would set in; as if heart had stopped; as if torn with red hot tongs in left mammary region; as after a long journey, weakness in back; as if he had eaten tough meat or hard nuts, in solar plexus; as when suffering from partially developed malaria; as if thorax was hollow.

[ll1 - Scarlatina - Hydrocyanicum acidum] Almost hopeless case from the start, rash livid, petechiae; rapid feeble pulse; sinking at stomach from prostration of solar plexus; long fainting spells; cold extremities; involuntary stools and urination; paralysis of oesophagus, the fluid runs gurgling down the throat; faint, convulsive respiration; heart's action very weak; pulse small, rapid, unequal.

[rcb4 - Helianthemum nummularium] To draw a parallel to the body, the human solar plexus, being the "sun" center of the nervous system from where important sympathetic nerve fibers pass to the visceral organs, is agitated and weakened during fright and nervousness and greatly benefits from the healing "rays" of this flower.

[vml2 - Mezereum] M - Overwhelming anxiety ARISING from STOMACH. Emotions are felt in stomach: anxious, oppressive feeling of weakness, emptiness and sinking [solar plexus].