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Muscle guide

Multifidus: deep back muscles and confident movement

A practical guide to paraspinal symptoms, movement assessment and progressive trunk exercise without assumptions about a damaged or unstable spine.

At a glance

  • Pain close to the spine does not identify a particular multifidus fascicle.
  • A less obvious contraction under the fingers does not establish damage, instability or the cause of pain.
  • Choose an exercise that helps a meaningful task; isolating one deep muscle is not required for useful rehabilitation.

Anatomy and image context

Multifidus is part of the transversospinal group. Its overlapping fascicles connect posterior vertebral structures across several levels. Lumbar portions lie close to the midline beneath the paraspinal fascial covering. Facet joints, posterior nerve branches and adjacent muscles share the region, limiting what surface palpation can identify. [3]

Illustrated overview

Multifidus

Essential Anatomy 5

Illustrated overview

Figure 02 · Trigger regions · Multifidus · right thoracic and upper lumbar regions

Multifidus · right thoracic and upper lumbar regions. Two unnumbered right regional examples: the multifidus component within the source combined mid-thoracic multifidi/rotatores panel, and the separate upper-lumbar multifidi example. Representative source regions; not numbered point assignments.

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About this illustration

Essential Anatomy 5 capture; colors and separate annotations edited without redrawing anatomy. Regional examples, not numbered point assignments.

  • Simons, Travell and Simons, Myofascial Pain and Dysfunction, Volume1, second edition, p917 Figure48.2A-B, with p919 Figure48.4 deep-paraspinal anatomy. The source distinguishes thoracic, upper-lumbar and sacral examples; its thoracic panel combines multifidi and rotatores.

What the examination can tell you

These are clinician-led observations. The interpretation and its limits belong together.

The movement that matters
Assessment
Observe a comfortable bend, return from bending, chair rise or roll in bed. Record the movement, pain distribution, support used and the person’s confidence.
What it adds
This provides a functional baseline and a place to begin graded practice.
Limit
Catching or guarding does not prove segmental instability or a muscle that has switched off. [1]
A limited contraction observation
Assessment
If useful, a clinician feels the lower paraspinal region during a small opposite-arm lift in supported prone lying. Compare resting and contracting firmness, recording pain separately.
What it adds
The multifidus lift test may supplement a movement-control assessment.
Limit
Its validation involved a selected population and an ultrasound comparison. Touch cannot isolate deep fascicles, establish a trigger point or determine the pain source. [3]
Regional and neurological examination
Assessment
Review changes in symptoms, relevant health history and leg symptoms. Examine strength, sensation and reflexes when indicated.
What it adds
These findings help decide whether ordinary active care or further investigation is appropriate.
Limit
A normal-looking muscle or an incidental scan change does not settle the diagnosis. [2]

Other causes to consider

Nonspecific low back pain

Regional movement-related pain without evidence identifying a particular tissue or serious cause.

Next step: Use a person-specific active plan, tracking disability and useful activity. [1][2]

Radicular or other neurological disorder

Leg pain with neurological changes or progressive loss of strength.

Next step: Perform a neurological assessment and select further investigations from the findings. [2]

A specific spinal or systemic condition

A significant injury, relevant cancer/infection history, fever or changing unexplained symptoms.

Next step: Seek medical assessment before treating the problem as local muscle tenderness. [2]

A practical management pathway

  1. Keep a manageable amount of movement

    Use comfortable walks and ordinary activities within current tolerance. Discuss what feels difficult and choose a small achievable goal rather than avoiding all back movement.

    Progression: Increase the exposure gradually and review a plan that produces a lasting deterioration. With ME/CFS or delayed, prolonged worsening after activity, seek an individualized energy-management plan; avoid fixed exercise increases. [2][4]

  2. Use a controllable trunk task

    One practical option is a supported hands-and-knees position with a small hand or foot slide. Progress to a single-limb lift if comfortable, allowing normal breathing.

    Progression: Increase reach or repetitions before combining opposite arm and leg. This is a movement-control example, not proof of selective multifidus restoration. [1]

  3. Connect exercise to daily function

    Practise an easier chair rise, light carry or hip hinge according to the goal. General strengthening, aerobic exercise and movement-control approaches can all be useful.

    Progression: Gradually reduce assistance or increase the relevant load. Avoid rigidly bracing throughout the day or searching for a deep knot with hard pressure. [1]

What to track

  • Repeat the same chair height, carry load or walking duration.
  • Track confidence, comfortable movement and the following-day response.
  • Use a back-disability measure when useful; muscle contraction or scan appearance should not be the sole outcome.

When to seek assessment

  • Emergency assessment: new bladder/bowel difficulty, saddle numbness or rapidly progressive leg weakness.
  • Medical review: significant trauma, systemic illness or progressive unexplained pain.

Evidence and limits

Specific trunk activation is one option within low-back rehabilitation. The cited evidence does not support telling every person with back pain that multifidus is damaged or that the spine is unstable.

Sources

  1. George et al. Interventions for Acute and Chronic Low Back Pain: Revision 2021

    Clinical practice guideline. Several exercise approaches are supported for low back pain; selection depends on presentation and capacity. No universal superiority of isolated multifidus training is established.

  2. NICE NG59: Low Back Pain and Sciatica — Recommendations (updated 2020)

    Clinical guideline. Regional assessment, activity and selective imaging. Does not identify a painful gluteal or spinal muscle from tenderness.

  3. Hebert et al. Evaluation of Lumbar Multifidus Function via Palpation (2015)

    Primary examination study. Reliability and concurrent validity of a contraction observation in a selected low-back-pain sample. Not a test for trigger points, pain causation or spinal instability.

  4. NICE NG206: Myalgic Encephalomyelitis / Chronic Fatigue Syndrome — Recommendations (2021)

    Clinical guideline. ME/CFS-specific activity and energy management; fixed exercise increments are not recommended.