The head hit that didn't knock you out.

The knockout is the concussion everyone recognizes, and it is the rare one. Most concussions never involve losing consciousness. They involve a hit, or a whip of the head without a hit, and then a set of changes that are easy to hide and easier to explain away: fog, a headache that hangs around, light that feels too bright, sleep that goes strange, a mood that is not yours. Athletes hide these because they can. This entry is about not hiding them.

The emergency line comes first

Chest pain, a sudden severe headache, weakness or numbness on one side, trouble speaking, a loss of bowel or bladder control, or a head injury with vomiting or worsening confusion is an emergency room trip right now, not a call to a clinic. The CDC's HEADS UP danger signs for a head injury include one pupil larger than the other, drowsiness or an inability to wake up, a headache that gets worse and does not go away, slurred speech, weakness or numbness, repeated vomiting, convulsions, and increasing confusion or agitation (CDC, HEADS UP: Signs and Symptoms). Any of those is an emergency room tonight, not a clinic tomorrow. The rest of this entry assumes the emergency line has been checked and is clear.

What a concussion looks like without a knockout

The CDC groups concussion signs into four buckets, and they are worth memorizing as an athlete, a parent, or a coach: thinking and remembering, physical, emotional and mood, and sleep. Thinking: trouble concentrating, feeling slowed down, not remembering the play or the drive. Physical: headache, nausea, dizziness, balance problems, sensitivity to light or noise, blurry vision, fatigue. Mood: irritability, sadness, anxiety, more emotional than usual. Sleep: more than usual, less than usual, or trouble falling asleep.

Notice how many of those are invisible from the sideline and how many an athlete can plausibly attribute to something else. Tired from practice. Stressed about the test. Did not sleep because of the game. That is why the ledger approach matters here more than anywhere: you write the entry down on the day, against a baseline, and the pattern shows up on paper before it shows up in a bad decision.

The crash version

A rear-end hit does not need to put your head into anything. The head whips back and forward on the neck, the brain moves inside the skull, and the same four buckets can follow. Athletes are especially prone to misfiling this one because there was no tackle, no helmet, no visible event. If you were in a crash and any of the buckets above showed up in the following days, that is a head entry, not a "stressful week" entry. The crash itself belongs in the ledger for separate reasons covered in the drive home.

Do not train through it on pride

Fog is data. Light sensitivity is data. Report them. The concern with returning too soon after a concussion is not toughness; it is that a second hit while the first is unresolved is a different category of injury. The CDC's return-to-sport guidance is a stepwise progression, taken one step at a time only when symptoms stay quiet, with clinical supervision of the decision (CDC, HEADS UP: Returning to Sports). No athlete should be making that call alone, and no coach should be making it from the bench.

What concussion rehab at the clinic involves, as published

Missouri Injury Clinic publishes TBI and concussion rehabilitative therapy after acute injury as one of its three lanes. On its TBI rehab page the clinic names the tools it uses: vagus nerve stimulation, a gentle microcurrent at the tragus of the ear; neurofeedback; Alpha Stim; sensory motor integration; exercise with oxygen; oculomotor rehabilitation, which is training for the eye movements that a concussion often disrupts; and cognitive rehabilitation using computerized brain-exercise software.

This desk reproduces that list because the clinic publishes it, and it stops there. We do not describe how each tool works on a given person, how many sessions anyone needs, or what any of it costs, because we do not know and will not guess. What a first visit in the concussion lane produces is the same as every other lane: a history, an exam, findings, and a written plan. Ask what the plan is and what would change it. If the findings point to something the clinic does not treat, the honest answer is a referral, and that answer is also an entry.

How to report it on the phone

Say "head" in the first sentence. Say when the hit or the crash happened and whether there was any loss of consciousness, even a few seconds. Say which buckets are showing up and when they started. If there was an emergency room visit, bring the paperwork. If you are a parent calling for a minor, say that, and be ready to describe what you have observed rather than what the athlete has admitted, because those are often different. The handoff entry has the one-paragraph script.

The ledger position

A head hit without a knockout still gets an entry, dated, with the four buckets checked against it for the next two weeks. If any bucket is active at day three, the athlete gets examined that week. If any emergency sign appears at any hour, it is 911 or the emergency room and nothing else. That is the entire policy, and it is the one thing on this desk we would ask every coach in the metro to copy.