Stress-associated neurovascular relay

The stress-associated neurovascular relay is the research finding behind Arborwake's Relay scenes in Vessel Margins. The game pairs it with a second case that shows the same symptom without the relay.

In the brain#

The relay (McKim et al., 2018). Male mice went through six daily sessions of repeated social defeat by an aggressive mouse. Activity in threat-related regions came with local microglial changes and adhesion at the vessel lining. Microglia were linked to CCL2 signalling. Recruited monocytes made IL-1β, and its receptor was found on the vessel lining. Blocking key parts reduced recruitment and some anxiety-like measures.

Limits. This is a severe male-mouse model that includes physical confrontation. The drugs used have broad effects. Social avoidance was not prevented by the same microglial interventions. The signal acted at the vessel lining without needing a broken blood–brain barrier.

The counter-example (Lehmann et al., 2016). A different defeat protocol, with dominant and subordinate housing, found stress effects but no blood macrophage entry. The review says this contradiction is "not noise to be erased".

In the game#

• II5 shows two conditions. In one, the relay can operate. In the other, local signalling rises but recruitment does not happen, so there is nothing to "fight".
• II6 has a similar outward disturbance but no matching recruitment. The plan forbids merging the two papers into one animal's two brain regions.
• The player separates three things: a signal being present, a recruited cell acting and a neuron's function.
• An educational label must name the animal model and say which control abilities are fiction.
• The Ranger is one participant in the relay, not its controller.

Development#

• Plan v0.5 Part IV (II5, II6) and the 29 October review §4.
• The turn-based Vessel Margins rooms in the alpha are encounter rooms, not this authored scene.

See also#

• Stress-associated neuroinflammation
• Monocyte
• Border-associated macrophage

Sources#

1. .GAME_PLAN/ARBORWAKE_STRESS_NEUROIMMUNE_RESEARCH_REVIEW_2026-10-29.md (working copy, not in Git)
2. .GAME_PLAN/ARBORWAKE_THE_LONG_WAKE_COMPLETE_GAME_PLAN_v0.5.md (working copy, not in Git)
3. .GAME_PLAN/ARBORWAKE_THE_LONG_WAKE_v0.5_CHANGE_HANDOFF.md (working copy, not in Git)