@file_pinax -> documents -> @essay_nervous_influence_on_digestive_system:document {title: "Essay on the Nervous Influence on the Digestive System", creator: @ellis, institution: @drexel_university, year: @date_1851, language: "en", subjects: ["Digestive system","Nervous system","Physiology","Medicine","19th century medicine"]}

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@ellis:person {full_name: "Ellis", role: "author", affiliation: @drexel_university, created: @date_1851}
@drexel_university:organization {location: "Philadelphia", country: @united_states}

@dr_wilson:person {full_name: "Dr. Wilson", contribution: "hypothesized vagus nerve controls gastric juice secretion"}
@dr_carpenter:person {full_name: "Dr. Carpenter", quote: "\"The only view of the character of inflammation that can account for its phenomena, is that which regards it essentially consisting in a disturbance of the duapration between the living tissues and the nutrient materials contained in the blood.\"", year: @date_1851}
@dr_reid:person {full_name: "Dr. Reid", research_focus: "experiments on vagus nerve and gastric secretion"}
@valentine:person {full_name: "Valentine", research_focus: "experiments on vagus nerve and gastric secretion"}

@vagus_nerve:concept {type: "cranial nerve", also_known_as: "par vagum"}
@spinal_cord:concept {type: "central nervous system component"}
@sympathetic_nerve:concept {type: "autonomic nerve pathway"}
@cardia:concept {type: "stomach sphincter", controlled_by: @spinal_cord}
@gastric_juice:concept {type: "digestive secretion"}
@saliva:concept {type: "digestive secretion"}
@bile:concept {type: "digestive secretion"}
@pancreatic_fluid:concept {type: "digestive secretion"}
@liver_secretion:concept {type: "digestive secretion"}
@blood:concept {type: "circulatory fluid"}
@inflammation:concept {type: "physiological response"}
@anemia:concept {type: "blood disorder"}
@solar_plexus:concept {type: "autonomic ganglion"}
@peristaltic_movement:concept {type: "muscular contraction", requires: [@vagus_nerve, @spinal_cord]}

@fear:concept {type: "mental emotion"}
@grief:concept {type: "mental emotion"}
@depression:concept {type: "mental emotion"}
@elevation_of_mind:concept {type: "positive mental state"}

@essay_nervous_influence_on_digestive_system -> discusses -> @nervous_system:concept
@essay_nervous_influence_on_digestive_system -> discusses -> @digestive_system:concept

@vagus_nerve -> influences -> @peristaltic_movement {evidence: "continuity of esophageal branches necessary for quick passage of food"}
@spinal_cord -> influences -> @peristaltic_movement {evidence: "irritation of dorsal, lumbar, sacral roots excites intestinal muscles"}
@spinal_cord -> controls -> @cardia {mechanism: "reflex action"}
@vagus_nerve -> controls -> @gastric_juice {attributed_to: @dr_wilson}
@sympathetic_nerve -> mediates -> @gastric_juice {channel: "derived from spinal system"}
@vagus_nerve -> mediates -> @liver_secretion {role: "brain cognizant of stomach condition"}
@elevation_of_mind -> increases -> @digestive_system:concept {effects: ["enhanced secretion of saliva","enhanced gastric juice","enhanced bile","enhanced pancreatic fluid"]}
@fear -> suppresses -> @saliva {observation: "saliva almost totally suspended by great fear and anxiety"}
@grief -> suppresses -> @saliva
@depression -> suppresses -> @saliva
@depression -> impairs -> @liver_secretion {consequence: "possible jaundice"}
@depression -> impairs -> @bile {consequence: "imperfect chyleification"}
@bile -> influences -> @blood {relationship: "blood formed from bile; abnormal bile yields abnormal blood"}
@blood -> supports -> @digestive_system:concept {dependency: "nutritive materials for tissue building"}
@solar_plexus -> injury -> @vital_functions {effect: "suspension of respiratory, digestive, and other movements; sudden cessation of vital actions"}
@injury -> of -> @spinal_cord {example: "concussion of the brain or solar plexus injury"}

@dr_carpenter -> described -> @inflammation {view: "disturbance of duapration between living tissues and nutrient materials in blood"}
@dr_carpenter -> noted -> @anemia {cause: "deranged nervous system in sedentary women leading to impaired digestion and impoverished blood"}