FND Education Project

REFERENCE · RECOVERY TECHNIQUE

Competing and Continuous Movement for Functional Jerks

Most likely fit: A jerk repeatedly emerges from a recognizable posture or pre-jerk muscle pattern, while a smooth, comfortable and purposeful movement through the same body region can sometimes remain organized. [Clinical consensus; direct component evidence is limited]

Not the same as: Restraining the limb, overpowering the jerk, or prescribing a generic “opposite movement.” The action must match the person’s anatomy, warning time, pain, balance and task.

For the Person With FND
For Family, Friends, and Other Supporters
For Clinicians and the Care Team
Research and Sources —

For the Person With FND

What this technique does

A clinician helps you find one gentle movement that gives the affected body part a clear, continuous job. For a hand or arm, that might mean sliding a cloth across a table or slowly rolling a light ball. For a seated leg, it might be keeping the foot in contact with the floor while sliding it toward a marker. The movement is practised when calm and may later be used at a familiar warning or during a manageable cluster.

“Competing” means the selected action is difficult to perform at the same time as the usual pre-jerk pattern. “Continuous” means it flows long enough to organize movement beyond one split-second jerk. It should feel purposeful rather than like a strength contest.

Anatomy in everyday language

Muscles normally work in coordinated groups. Agonists are the muscles mainly producing a movement; antagonists produce the opposite movement; stabilizers hold another body part steady enough for the task. For example, elbow bending uses the biceps and brachialis, while straightening uses the triceps. The shoulder blade is controlled by muscles including the trapezius and serratus anterior so the arm has a stable base.

An axial or trunk jerk may involve abdominal muscles, hip flexors or muscles beside the spine. Large trunk exercises can threaten balance and are not a safe home substitute for assessment. The visible movement also does not prove which muscle fired first. The clinician uses anatomy to make the task safe and efficient, not to assign blame to one muscle.

What practice may look like

  1. Start supported and remove hazards. A seated tabletop task is often safer than standing.
  2. Choose one smooth movement with a visible goal, comfortable range and low load.
  3. Practise at an easy pace without waiting for or deliberately provoking a jerk.
  4. Keep breathing and avoid gripping, shoulder hiking or bracing the jaw and trunk.
  5. If a familiar warning appears and there is time, continue or begin the agreed action.
  6. Shift attention to the result—the cloth reaching the line or the ball reaching the other hand—rather than checking every muscle.
  7. Stop if the action causes pain, repeated dropping, loss of balance, escalating jerks or marked delayed worsening.
  8. When control is steadier, transfer the movement into one useful daily task.

Some jerks have no warning or involve sudden loss of muscle activity. In that case, a competing action may not be available at onset. Safety adaptations—such as seated preparation, lidded containers or avoiding carrying hot liquids during a cluster—may matter more.

What improvement can mean

Improvement may be fewer interruptions, safer object handling, lower effort, a shorter cluster or quicker return to a task. A movement need not eliminate every jerk to be useful. New or substantially changed symptoms, altered awareness, injury or other neurological changes need reassessment.

For the Person With FND
For Family, Friends, and Other Supporters
For Clinicians and the Care Team
Research and Sources —

For Family, Friends, and Other Supporters

Set up the surface or lightweight object the person uses in practice. If invited, name the goal once: “slide to the blue line.” Do not grab the limb, push it into the opposite direction or add resistance. A competing task is not a contest between you and the movement.

During a familiar bout, remove hazards first. Offer the rehearsed action only if the person has enough warning, awareness and safe positioning. If not, follow the fallback plan. Focus encouragement on safe participation and completion rather than perfectly still movement.

For the Person With FND
For Family, Friends, and Other Supporters
For Clinicians and the Care Team
Research and Sources —

For Clinicians and the Care Team

Selection and movement analysis

Identify whether the therapeutic target is the pre-jerk recruitment, the functional interruption or the recovery between repeated jerks. Characterize the involved joint sequence, direction, speed, range, support surface, pain and postural threat. A selected movement may be incompatible with one patient’s pattern and reproduce another’s; phenotype-specific observation is essential.

For an upper-limb pattern, examine scapular elevation/protraction, glenohumeral direction, elbow flexion/extension, forearm pronation/supination and wrist/digital position. For a lower limb, assess pelvic control, hip flexion/extension and abduction/adduction, knee control and ankle plantarflexion/dorsiflexion. For axial jerks, assess trunk and hip contribution with particular attention to balance, spine symptoms and respiratory bracing.

Explicit treatment sequence

  1. Define one low-risk functional goal and record baseline interruption, assistance, pain, effort and delayed response.
  2. Provide adequate proximal and trunk support; reduce gravity or load where necessary.
  3. Select a continuous trajectory that differs from the usual abrupt direction and remains well within comfortable range.
  4. Use an external target and one concise instruction. Shape smoothness and task completion before speed or endurance.
  5. Observe for overflow: jaw clenching, breath-holding, shoulder elevation, distal gripping or global co-contraction. Reduce range, load or cueing complexity if these increase.
  6. Rehearse at baseline, then introduce naturally occurring mild warning states when safe. Do not provoke a severe jerk cluster.
  7. Transfer immediately to the chosen activity and fade therapist handling or verbal cues.
  8. Provide a clear fallback for no warning, loss of balance, dropped objects or symptom escalation.

Manual contact, if used, should guide the task with consent and the least force necessary. It must never become restraint. Avoid ballistic loading, end-range forcing and unsupported axial practice.

Progression, regression and measures

Regress by adding support, reducing the movement range, slowing the task, removing simultaneous demands or switching to observation and safety planning. Progress by fading cues, varying the object or context, increasing task relevance, or moving from seated to standing only after balance risk is controlled. More repetitions are not automatically better.

Measure task completion, interruption, object safety, assistance, effort, pain, bout duration, confidence and delayed response. Current support comes from functional-motor rehabilitation consensus and broader occupational-therapy principles; no controlled study establishes this component as a functional-jerk-specific treatment. [1][2]

For the Person With FND
For Family, Friends, and Other Supporters
For Clinicians and the Care Team
Research and Sources —

Research and Sources

Citation Full citation
[1] Nielsen G, Stone J, Matthews A, et al. Physiotherapy for functional motor disorders: a consensus recommendation. Journal of Neurology, Neurosurgery & Psychiatry. 2015;86(10):1113–1119. FND-CIT-0028. https://doi.org/10.1136/jnnp-2014-309255
[2] Nicholson C, Edwards MJ, Carson AJ, et al. Occupational therapy consensus recommendations for functional neurological disorder. Journal of Neurology, Neurosurgery & Psychiatry. 2020;91(10):1037–1045. FND-CIT-0011. https://doi.org/10.1136/jnnp-2019-322281

Detailed technique page created: September 11, 2026 · Clinical and accessibility review pending

For the Person With FND
For Family, Friends, and Other Supporters
For Clinicians and the Care Team
Research and Sources —