Confidence gets priority access. Before the brain settles on whether a stranger looks young or old, it has already tagged how sure of himself he seems from the angle of his shoulders and the set of his spine.
What this implies is blunt: social threat and opportunity are scored before biography. Visual input hits the primary visual cortex and, within roughly 200 milliseconds, downstream circuits in the superior temporal sulcus and premotor areas have extracted posture cues that signal dominance or uncertainty, long before slower networks estimate age from facial geometry or skin texture.
Such speed suggests an evolutionary triage system, not a cosmetic quirk. Neural pathways tuned to joint angles, torso tilt and limb expansion appear optimized for rapid appraisal of intent, feeding into autonomic responses that nudge heart rate and micro-movements, while more deliberative prefrontal regions take extra beats to infer demographic details like age or status.
The unsettling part is how automatic this ranking is. You may believe you are listening to words, weighing arguments, judging competence on evidence, yet your brain has already filed that stranger as confident or hesitant, based on posture alone, in less than the time a camera shutter stays open.
