REFERENCE · DIAGNOSTIC TECHNIQUE

Hoover’s Sign

Purpose and Suitability
Anatomy and Physiology
Preparation and Examination
Interpretation and Explanation
Evidence and Limitations
Media and Accessibility
Research and Sources

Purpose and Suitability

Hoover’s sign compares deliberately requested hip extension with associated extension during the opposite leg’s movement. It is used in the assessment of suitable unilateral leg weakness, with a sufficiently strong opposite leg for comparison. It is not a test for every weak limb or an upper-limb sign. [1][2]

Unilateral: Affecting one side. Contralateral: On the opposite side.

The finding belongs in a clinician’s neurological assessment. It is not a home exercise, a measure of effort or a disability rating. Pain, restricted hip movement, difficulty understanding the task, neglect and marked weakness in both legs can limit interpretation. [3]

Purpose and Suitability
Anatomy and Physiology
Preparation and Examination
Interpretation and Explanation
Evidence and Limitations
Media and Accessibility
Research and Sources

Anatomy and Physiology

Hoover’s sign is one positive examination sign that may help when one leg is weak. During the direct task, the person is asked to press the affected heel down. During the comparison task, the opposite thigh lifts against the examiner’s resistance. The affected heel may then press down more strongly without the person deliberately concentrating on it.

The medical term for pressing the thigh backward is hip extension (moving the thigh behind the body, or pressing the heel downward while lying flat). The main hip extensor is the gluteus maximus (the large buttock muscle), assisted by the hamstrings (muscles at the back of the thigh). Hoover’s sign compares deliberate access to that movement with the automatic contribution that normally occurs when the opposite hip flexes (the other thigh moves toward the chest). [1][2]

This contrast is not a test of honesty, motivation or effort. It may demonstrate that a movement pathway is available under one condition but is not reliably accessible during deliberate movement. That can provide positive evidence for functional leg weakness and a possible starting point for rehabilitation. It is not a simple yes-or-no test for every kind of weakness, and it cannot establish that an injury or another neurological condition is absent by itself.

Hip flexion: Bringing the thigh toward the chest. Hamstrings: Muscles at the back of the thigh.

Purpose and Suitability
Anatomy and Physiology
Preparation and Examination
Interpretation and Explanation
Evidence and Limitations
Media and Accessibility
Research and Sources

Preparation and Examination

Explain the comparison, obtain consent and check comfort before positioning. Agree how the person can ask to stop. Use appropriate assistance for transfers and avoid provoking a hazardous episode. Pain, comprehension or mechanical restrictions should be documented rather than overcome by greater force.

Supine: Lying on the back. Calcaneus: Heel bone. Proximal to the knee: Just above the knee, toward the hip.

The following clinician-oriented outline preserves the existing project explanation. The resisted opposite-hip comparison is described in the 2011 study; fuller paired comparisons are discussed in the 2025 review. [1][2][3]

Confirm suitability. The classic comparison is most useful for unilateral lower-limb weakness. Identify pain, hip or pelvic injury, restricted range, impaired comprehension, neglect, severe bilateral weakness or other factors that could invalidate the comparison.
Explain the purpose. Tell the patient that you will compare direct and automatic activation of the same hip-extension movement. Avoid framing the procedure as a test of effort.
Position the patient. Use a comfortable supine position (lying on the back) with the legs supported and hips close to neutral. The examiner needs access beneath each calcaneus (heel bone) without forcing the ankle or hip.
Assess direct hip extension. Ask the patient to press the heel of the weak leg downward into the examination surface while you assess the force beneath that heel. Note pain, substitution through lumbar extension or pelvic rotation, and whether the instruction was understood.
Assess the automatic comparison. Keep a hand beneath the heel of the weak leg. Ask the patient to flex the contralateral hip (lift the opposite thigh toward the chest) against resistance applied just proximal to the knee, using only as much resistance as is safe and necessary.
Feel for associated extension. In ordinary reciprocal lower-limb recruitment, resisted hip flexion on one side is accompanied by downward extension pressure from the other heel. A clear increase in pressure beneath the weak heel during this opposite-leg task, compared with direct requested extension, is the positive contrast.
Record the reverse comparison. When the affected leg is asked to lift, associated downward pressure beneath the opposite heel may be reduced compared with that leg’s directly demonstrated extension force. Interpret the comparison cautiously, including pain, attention, comprehension and mechanical leverage.
Integrate the finding. A positive contrast may support functional leg weakness in the appropriate clinical context. An absent contrast does not exclude FND. Do not use one sign to dismiss a plausible structural or coexisting disorder.
Explain the result. A useful formulation is: “The muscles and movement pathway contributed more automatically during the other-leg task. That supports a functional pattern and gives us movement to build on. It does not mean you can simply choose normal strength.”

The gluteus maximus is the principal hip extensor, with the hamstrings—semitendinosus, semimembranosus and the long head of biceps femoris—assisting. Trunk and pelvic stabilizers also affect the force transmitted through the heel. The examination therefore compares a coordinated motor pattern, not the isolated output of one muscle. Observe alignment and substitution rather than reducing the finding to a single force grade.

The reverse comparison is part of the fuller description reviewed in 2025. Record the actual protocol used; do not assume accuracy estimates apply unchanged to abbreviated or seated versions. [3]

Purpose and Suitability
Anatomy and Physiology
Preparation and Examination
Interpretation and Explanation
Evidence and Limitations
Media and Accessibility
Research and Sources

Interpretation and Explanation

Pain, difficulty understanding the task, neglect, severe weakness in both legs, limited hip movement and other neurological or musculoskeletal conditions may make Hoover’s sign unsafe, absent or difficult to interpret. A negative Hoover’s sign does not rule out FND, and a positive sign is interpreted with the history and the rest of the neurological examination.

Neglect: Difficulty attending to one side of space or the body, often due to neurological disease; it can affect the comparison.

An example explanation is: “Your leg contributed more force automatically during the other-leg movement. This finding helps explain the functional pattern. We still need to understand how weakness affects your day and what support you need.”

For neurology and general practice, document which comparison was positive and the remaining diagnostic questions. For physiotherapy and occupational therapy, it may identify movement worth assessing further, but does not establish safe walking, sustained activity or independence. Psychological care can address distress where appropriate without treating the sign as evidence of a psychological cause. See assessment and everyday function.

Purpose and Suitability
Anatomy and Physiology
Preparation and Examination
Interpretation and Explanation
Evidence and Limitations
Media and Accessibility
Research and Sources

Evidence and Limitations

McWhirter and colleagues recruited 337 people presenting with suspected stroke; 124 had leg weakness and eight were diagnosed with functional disorder. Reported sensitivity was 63% (95% confidence interval 24–91%) and specificity 100% (97–100%). The study was unblinded and the functional subgroup small. These figures do not mean the sign is infallible or equally accurate in every setting. [2]

Sensitivity: How often the test detects the condition among people who have it. Specificity: How often it is negative among people without the condition. Confidence interval: A range showing statistical uncertainty around the estimate.

The 2025 review describes protocol differences, limited prospective evidence and confounding factors. Its search ended in March 2024. A targeted update search on September 26, 2026 did not establish a newer large prospective replication; this was not an exhaustive systematic review. [3]

Access limit: The 2011 study’s primary abstract and institutional record were checked; its complete article was not retrieved. Detailed technique wording was cross-checked against the accessible clinical review and 2025 review. Full primary-text verification and clinical review remain outstanding; this draft does not claim a completed evidence trail.

Purpose and Suitability
Anatomy and Physiology
Preparation and Examination
Interpretation and Explanation
Evidence and Limitations
Media and Accessibility
Research and Sources

Media and Accessibility

People and setup: A neurologist or suitably trained clinician, a patient who has separately consented to public recording or an actor/volunteer, an examination bed and a second camera operator.

Essential shots:

A wide side view showing both legs and the clinician’s position.
A labelled “direct hip extension” phase showing the affected heel asked to press down.
A labelled “automatic hip extension” phase showing the opposite hip flexing against resistance.
A close-up or diagram showing the examiner’s hand beneath the affected heel; do not rely on the close-up alone.
A final clinician explanation: “This contrast may support functional leg weakness. It does not mean the symptom is chosen, and it is interpreted with the rest of the examination.”

Keep both phases in their true order. Do not edit together different attempts to exaggerate the contrast. Do not identify the participant’s affected side incorrectly when footage is mirrored.

Suggested alternative image: Two matching side-view diagrams labelled “direct hip extension” and “automatic hip extension during opposite hip flexion,” with arrows showing heel pressure.

Existing asset review: The repository’s functional-weakness-hoovers-sign-infografik-09-2027.png remains unchanged. It is not embedded here as a procedural illustration: the second panel does not clearly show resistance to hip flexion or palpation beneath the affected heel, and the quadriceps label can distract from the hip-extension comparison. A clinician should review/correct the positioning and labels before publication. The filename is preserved.

A useful alternative description for a corrected image would identify the affected side, requested movement, examiner resistance and the heel being assessed in each panel. The text above remains available without an image.

Purpose and Suitability
Anatomy and Physiology
Preparation and Examination
Interpretation and Explanation
Evidence and Limitations
Media and Accessibility
Research and Sources

Research and Sources

The general review provides clinical context; the 2011 cohort provides the prospective accuracy estimates; the 2025 review compares examination descriptions and limitations. No result here measures everyday disability or guarantees treatment response.

Citation	Figure	Full citation and scope
[1]	—	Bennett K, Diamond C, Hoeritzauer I, Gardiner P, McWhirter L, Carson A, Stone J. A practical review of functional neurological disorder (FND) for the general physician. Clinical Medicine. 2021;21(1):28–36. https://doi.org/10.7861/clinmed.2020-0987 FND-CIT-0001.
[2]	—	McWhirter L, Stone J, Sandercock P, Whiteley W. Hoover’s sign for the diagnosis of functional weakness: a prospective unblinded cohort study in patients with suspected stroke. Journal of Psychosomatic Research. 2011;71(6):384–386. https://doi.org/10.1016/j.jpsychores.2011.09.003 FND-CIT-0018.
[3]	—	Dolbow J, El-Azzouni S, Zhang Y, Geiger C. A practical guide to assessing functional motor weakness: a review of validated techniques. Journal of neurology. 2025;272(6):427. DOI. PMID: 40423819. FND-CIT-0183.

Purpose and Suitability
Anatomy and Physiology
Preparation and Examination
Interpretation and Explanation
Evidence and Limitations
Media and Accessibility
Research and Sources