REFERENCE · DIAGNOSTIC TECHNIQUE

Smartphone-Video Assessment

Clinician-focused educational reference. Other readers are welcome; this is not a home diagnostic test.

Purpose and Suitability
Anatomy and Physiology
Preparation and Safety
Performing the Assessment
Interpreting Findings
Explaining the Result
Evidence and Limitations
Media and Accessibility
Research and Sources

Purpose and Suitability

Expert review of a safely recorded spontaneous episode can add information that is difficult to describe from memory. It supplements the history and helps decide whether further testing is needed; it does not record brain electrical activity. [1][2]

Smartphone-video assessment: A clinician interprets an existing recording alongside the person’s history, witness account and other relevant evidence.

A person without a recording should still receive assessment. An unclear clip may be useful for a limited question without being sufficient to classify the event.

Anatomy and Physiology

A camera records visible movement, interaction and sound. It cannot directly measure awareness, oxygen levels, blood pressure or epileptic discharges. A person may remember an episode differently from how their visible responses appear.

Postictal: The period after a seizure, when recovery symptoms may continue.

A recording can begin after the seizure itself has ended. Confused or irregular movements during recovery may then be mistaken for the seizure. Interpret the sequence and timing before deciding what the clip represents. [3]

Preparation and Safety

Agree recording preferences in advance where possible, including privacy, storage and who can receive the video. Use the clinical service’s approved transfer route; public posting is not needed for assessment. Separate permission is required for any educational use.

Protect the person first. If filming would delay care, leave them unsupported, expose them to hazards or require provoking an event, do not film. Do not restrain limbs, force the eyes open, apply pain or drop a hand toward the face for a better demonstration. A witness should not become an examiner.

Aim for a naturally occurring event only when another person can safely record. No flash or intrusive close-up is necessary. Keep ordinary support in place and stop if privacy or care requires it. These are practical safeguards, not research-tested diagnostic criteria.

Performing the Assessment

Identify which reported event type the clip is intended to show and ask whether it is usual for the person.
Establish what happened before recording began, including whether the onset was missed or medication had already been given.
Review the complete original clip, including available sound and recovery. Note interruptions, editing, poor visibility and parts of the body outside the frame.
Describe the sequence in ordinary clinical terms before interpreting it. Record what is visible and what is inferred from witness history.
Compare the clip with the patient’s account, witness account and available EEG or other investigations. Seek epilepsy expertise where needed.
If evidence conflicts or another event type remains unexplained, state that uncertainty and arrange the appropriate next assessment. [1][2][3]

This is an editorial clinical workflow, not a validated six-item scoring tool. A recording should remain useful without staging responses or repeating episodes.

Interpreting Findings

Informative: A clear, representative sequence may support a specialist diagnosis or help target further investigation.

Limited: Missing onset, hidden face or limbs, a brief excerpt, medication effects or uncertain typicality may prevent classification.

Discordant: A clip and history that suggest different explanations warrant further assessment, not simply choosing the more striking evidence. A published case showed an apparently functional-looking clip was actually agitation after an epileptic seizure. [2][3]

Video-only assessment cannot independently exclude epilepsy, identify a cardiac cause or establish blood oxygen levels. It also cannot establish the person’s usual endurance, safety or support needs between recordings.

Explaining the Result

An editorial example:

“This video helps me understand the movements you described. It starts after the first part of the episode, so I cannot yet tell whether we are seeing the event itself or recovery. Let’s put it together with what happened before the camera started.”

When a clip supports a diagnosis, explain the actual combination of findings and its limits. Thank the person for the information without making further filming a condition of care.

Evidence and Limitations

Tatum and colleagues prospectively studied 44 adult outpatients at eight specialist centres: final diagnoses were 11 epileptic, 30 functional/psychogenic nonepileptic and three other physiological events. Ten experts and nine senior residents reviewed videos masked to the final video-EEG diagnosis. Adding video to history/examination improved diagnostic accuracy in the study. [2]

The small, self-selected sample, specialist setting, multiple ratings of the same videos and handling of “unknown” responses limit generalization. The widely cited 89.1% expert accuracy concerned prediction of epileptic seizures; it is not a universal accuracy figure for functional seizures or for public interpretation of videos. [2]

Freund and Tatum’s report describes one postictal misclassification pitfall; it illustrates a failure mode, not its frequency in practice. [3]

Full-text methods/results/limitations of the prospective study and the pitfall report’s case and interpretation were checked October 1, 2026. Evidence for children, nonmotor events and nonspecialist performance cannot simply be inferred from this adult specialist study.

Media and Accessibility

For teaching, use a diagram showing the event timeline and when the camera started. Include an example with missing onset to explain uncertainty. Do not use a dramatic clip as a diagnostic guessing game.

Clinical recordings need explicit educational-use consent, privacy review, captions and a transcript. Provide a text alternative so readers can avoid symptom footage. No media has been added.

Research and Sources

The prospective study supports video as an adjunct. The case report explains why timing and context remain essential. The AAN guidance places recordings within a broader clinical pathway.

Citation	Figure	Full citation
[1]	—	Tolchin B, Goldstein LH, Reuber M, et al. Management of functional seizures practice guideline executive summary: report of the AAN Guidelines Subcommittee. Neurology. 2026;106(1):e214466. FND-CIT-0010. https://doi.org/10.1212/WNL.0000000000214466 AAN clinician summary.
[2]	—	Tatum WO, Hirsch LJ, Gelfand MA, et al. Assessment of the Predictive Value of Outpatient Smartphone Videos for Diagnosis of Epileptic Seizures. JAMA neurology. 2020;77(5):593-600. DOI. PMID: 31961382. FND-CIT-0168.
[3]	—	Freund B, Tatum WO. Pitfalls using smartphones videos in diagnosing functional seizures. Epilepsy & Behavior Reports. 2021;16:100497. DOI. Full text. FND-CIT-0234.