The Short Answer Educational content only, not medical advice. No test described here diagnoses concussion on its own, and concussion diagnosis remains clinical. The advanced imaging methods covered in this series are research tools that detect group-level differences and are not validated to diagnose or exclude concussion in an individual person. Be cautious about clinics selling scans or brain maps as diagnostic. Discuss any assessment with a concussion-experienced clinician who can interpret it alongside your history and examination. SCAT6 is a standardized multi-part assessment structuring the clinical evaluation of a suspected concussion, covering red flags, observable signs, immediate memory questions, a 22-item symptom checklist, cognitive screening, a brief neurological examination, and balance testing. It is designed for healthcare professionals and is most sensitive within 72 hours of injury, with utility declining after that (Echemendia et al., 2023). Importantly, it produces a structured record rather than a diagnostic score. International consensus guidance is explicit that concussion diagnosis remains clinical and that no component of SCAT6 confirms or excludes it (Patricios et al., 2023). It structures assessment across seven components rather than producing a single score. Sensitivity is highest within 72 hours and declines afterwards. It is for healthcare professionals, with a separate tool for non-clinicians. The Immediate On-Field Components The first sections are designed for the immediate sideline setting. Red flags come first: neck pain, double vision, weakness or tingling, severe or increasing headache, seizure, deteriorating consciousness, vomiting, and increasing agitation all mandate emergency transfer rather than further testing. Observable signs follow, including lying motionless, unsteadiness, a blank look, and facial injury. The Maddocks questions test immediate orientation to the game situation rather than to person, place, and time, which is more sensitive in athletes. Cervical spine assessment and coordination screening complete the immediate evaluation. The Symptom Checklist The symptom evaluation lists 22 symptoms rated 0 to 6, producing both a symptom count out of 22 and a severity score out of 132. It covers physical symptoms such as headache and nausea, cognitive symptoms such as fogginess and slowed thinking, emotional symptoms including irritability and sadness, and sleep-related items. Self-report is the strength and the weakness here, since athletes frequently underreport to continue playing and others over-report under other pressures. Comparison with a pre-season baseline improves interpretation, since many healthy people report several of these symptoms at low levels normally. The Cognitive Screening Cognitive screening uses the Standardized Assessment of Concussion components: orientation questions, immediate memory across word list trials, concentration through digits backward and months in reverse order, and delayed recall of the word list after a gap. SCAT6 expanded the word list options and trial structure compared with earlier versions to reduce ceiling effects, where too many people scored perfectly for the test to detect impairment. Practice effects remain a consideration across repeated administrations, and alternate word lists exist to reduce them. The Balance and Neurological Components Balance testing uses the modified Balance Error Scoring System, counting errors across double leg, single leg, and tandem stances on a firm surface, with an optional foam surface condition and an optional tandem gait timed task. Errors include hands off hips, opening eyes, stepping or falling, and remaining out of position beyond five seconds. The neurological screen covers reading, eye movements, coordination, and gait. Balance testing is affected by fatigue, ankle injury, footwear, and surface, so these need recording alongside the score. What SCAT6 Does Not Do Several limitations matter. It does not diagnose concussion, and a normal SCAT6 does not exclude one, so an athlete with a suspected concussion is removed from play regardless of result. Its sensitivity drops substantially after the first few days, which is why a separate tool exists for assessment beyond 72 hours. It is not designed for children under 13, who have a dedicated version. Baseline testing is helpful but not required, and consensus guidance notes baselines are not necessary for interpretation in most settings. It also does not replace medical assessment for anyone with red flags. Assessment identifies what is driving symptoms. Cervical and vestibular contributors are among the most commonly found and the most treatable. Start your 3-day free trial for joint-specific mobility programming addressing the neck side of those findings. Supporting Mobility Routine JME 14 Chin tucks reduce the upper cervical tension driving cervicogenic headache, one of the most common findings on post-concussion assessment. Ten repetitions with 5-second holds. JME 1 Cervical rotation restores segmental mobility, which is directly relevant where assessment identifies a cervical contribution to dizziness. Ten repetitions per direction. JME 15 Cervical lateral flexion addresses side-bending restriction sustaining neck tension and headache. Ten repetitions per side. JME 16 Cervical flexion and extension restore sagittal mobility restricted by suboccipital guarding after impact. Eight slow repetitions. JME 2 Cervical retraction reinforces a neutral head position, reducing the postural strain that worsens symptoms during screen-based testing. Ten repetitions per set. JME 150 Thoracic rotation restores mid-back motion, which reduces compensatory load on the cervical spine. Eight repetitions per direction. JME 227 Overhead reach opens the thoracic spine and rib cage, supporting the breathing mechanics behind nervous system regulation. Ten repetitions with controlled tempo. JME 155 Diaphragmatic breathing lowers sympathetic drive, which reduces the symptom load that degrades performance on any cognitive assessment. Ten slow breaths, several times daily. Start your 3-day free trial for joint-specific mobility programming addressing the cervical contributors assessment identifies. Common Mistakes Treating a normal SCAT6 as excluding concussion Using it beyond 72 hours, where sensitivity drops substantially Continuing the assessment when red flags are present Using the adult version for children under 13 Ignoring underreporting of symptoms by athletes wanting to play Overlooking fatigue, footwear, and surface effects on balance scores Repeating identical word lists and inflating scores through practice Progression Check red flags first and transfer for emergency assessment if any are present. Where none are, complete the immediate components on the sideline and remove the athlete from play on suspicion regardless of score. Complete the full assessment in a quiet setting. Beyond 72 hours, move to the tool designed for the later phase rather than repeating SCAT6. Follow with domain-specific assessment such as vestibular, ocular, and cervical examination where symptoms persist, since that directs treatment. Does SCAT6 diagnose concussion? No. It structures and documents clinical assessment, and international consensus guidance states diagnosis remains clinical with no single test confirming or excluding it. An athlete with suspected concussion is removed from play regardless of the SCAT6 result. What does SCAT6 include? Seven components: red flag screening, observable signs, Maddocks immediate memory questions, a 22-item symptom checklist scored to 132, cognitive screening covering orientation, memory, concentration and delayed recall, a neurological screen, and modified Balance Error Scoring System testing. How soon after injury should SCAT6 be used? Within 72 hours, where its sensitivity is highest. Utility declines meaningfully after that point, and a separate assessment tool exists for evaluation in the subacute phase beyond the first few days. Is a baseline SCAT6 necessary? Helpful but not required. Consensus guidance notes baseline testing is not necessary for interpretation in most settings, since normative comparisons exist. A baseline does assist interpretation of the symptom checklist, because many healthy people report several listed symptoms at low levels. Can SCAT6 be used for children? Not the standard version. A dedicated child version exists for those under 13, with age-appropriate wording, symptom items, and parent report. Using the adult version in younger children produces unreliable results. How These Tools Fit Together Concussion diagnosis is clinical. It rests on the injury mechanism, the symptoms, and the examination, and international consensus guidance is explicit that no single test establishes or excludes the diagnosis (Patricios et al., 2023). Everything described in this series sits in a supporting role. Sideline and clinic tools such as SCAT6, VOMS, and King-Devick add structure and reproducibility to the clinical assessment. Computerized cognitive batteries quantify one specific domain. Advanced imaging methods detect group-level differences in research populations and are not validated for individual diagnosis (Maas et al., 2022). Confusing these roles is the most common error patients and clinicians make. What Assessment Is Actually For Confirming a clinical picture already suspected from history and examination Identifying which subtype is driving symptoms: vestibular, ocular, cervical, mood, sleep, or migraine Tracking change over time against the person's own earlier results Supporting return-to-play and return-to-work decisions with objective data Ruling out structural injury needing emergency treatment, which is what standard CT does Directing treatment toward the specific system involved Documenting recovery for insurance, legal, or occupational purposes Why Advanced Imaging Is Not Diagnostic Yet The barrier is not that these methods detect nothing. Diffusion imaging, functional MRI, magnetoencephalography, spectroscopy, and perfusion imaging all show reproducible group differences between concussed and control populations. The barrier is the gap between a group difference and an individual diagnosis. Concussion effects are small relative to normal human variation, findings differ in direction between studies and time points, most research lacks pre-injury baselines, acquisition and analysis methods vary between centers, and few studies report the sensitivity and specificity needed to classify one person (Lindsey et al., 2023, and Mayer et al., 2015). A test cannot be clinically diagnostic until it performs reliably on a single scan against a validated normative reference, and that threshold has not been met. Questions Worth Asking About Any Test Several questions separate useful assessment from expensive noise. Does the result change treatment, or only produce a label. Is there a baseline or normative comparison appropriate to your age, sex, and background. What are the sensitivity and specificity for individual diagnosis, and does the provider quote them. Would a concussion-experienced clinician interpret this alongside examination findings, or is it delivered as a standalone report. Is the test being sold directly to patients outside standard clinical pathways. Persistent symptoms usually reflect treatable vestibular, cervical, visual, sleep, or mood problems, and identifying those through clinical assessment changes management in a way most advanced imaging currently does not (Silverberg et al., 2020). References Patricios, J. S., Schneider, K. J., Dvorak, J., et al. (2023). Consensus statement on concussion in sport: the 6th International Conference on Concussion in Sport, Amsterdam, October 2022. British Journal of Sports Medicine, 57(11), 695-711. PubMed Echemendia, R. J., Brett, B. L., Broglio, S., et al. (2023). 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