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Doctor insights on: Ankle Clonus Causes

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Unilateral hoffman's sign and on the same side have non sustained ankle clonus. What's the cause of this?

Unilateral hoffman's sign and on the same side have non sustained ankle clonus. What's the cause of this?

Poss c-spine prob: Hoffman's sign is used by clinicians when there is a suspicion of cervical spine pathology possibly pressing on the spinal cord. The sign is more accurate when present bilaterally but can be seen when unilateral. It has also been reported in hyperthyroidism and anxiety states. I hope this helps. Good luck and well wishes. ...Read more

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Dr. Barbara Lavi
62 Doctors shared insights

Clonus (Definition)

Clonus = involuntary, muscular contractions & relaxations which may be seen ...Read more


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I heard that immature myelin in toddlers can cause mild ankle clonus, is it true? When does the myelin will get mature?

I heard that immature myelin in toddlers can cause mild ankle clonus, is it true? When does the myelin will get mature?

Maturation: The nervous system matures from top down and inside to outside. Ankle clonus is normal in infants until they begin to walk, which the maturation allows. Persistence after 15-18 mo would be a problem. They first gain a wide grasp with fingers like pincers, but fine motor control of the individual fingers will not come in until well into school age. ...Read more

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My eight year old seems to have clonus reaction in ankle when sitting with her heels raised. Full neuro exam normal. What can the cause be?

Likely normal: Some clonus is not abnormal. If the clonus is sustained (keeps going and going) then that indicates some neurological issue and may need to be further investigated with a brain or neck mri. However, if there are no other issues then nothing may need to he done. ...Read more

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Possible causes for bilateral ankle clonus if spine and brain MRI are normal? Clonus is more prominent on the left side. Can clonus ever be bening?

Possible causes for bilateral ankle clonus if spine and brain MRI are normal? Clonus is more prominent on the left side. Can clonus ever be bening?

Ankle clonus: Yes. Ankle clonus and hyper reflexes can be inherited and are a benign variation of normal reflexes. As long as there is no compression on the spinal cord and no damage to the brain, then there is no reason to worry ...Read more

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I have bilateral ankle clonus. Spine MRI was normal. Seeing a neurologist soon. Could MS-disease cause this by affeting the brain instead of spine?

Clonus: Clonus is a sign that suggests the pathway that regulates muscle contraction was disrupted at some time. It is possible that changes in the brain, not the spine, caused this. But consider this- some people are born this way, and it does not mean that you will eventually be found to have MS. If you had clonus in one ankle, maybe I would think otherwise. ...Read more

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When is ankle clonus normal?

It is not: Ankle clonus is a reflex seen in states such as stroke, multiple sclerosis, spinal cord damage, hepatic encephalopathy and serotonin syndrome. If it is present, a neurologic referral is in order. ...Read more

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What are some sign that I may have ankle clonus?

What are some sign that I may have ankle clonus?

Spasms & relaxation: Ankle clonus is a series of abnormal reflex movements of the foot, induced by bending the foot upward at the ankle, causing alternate contraction and relaxation of the calf muscle. This can be present in stroke patients, spinal cord injury, and multiple sclerosis. If this is indeed present, talk to your doctor about getting a neurology referral. ...Read more

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Who can I ask to explain the ankle clonus test results to me?

Who can I ask to explain the ankle clonus test results to me?

Movement disorder: Ankle clonus is a movement disorder characterised by involuntary waves of muscle contractions in the ankle that occur in responce to streching the muscle in and around the ankle.
It is usually sign of neurological disorder as body normally prevents such contractions from occuring. ...Read more

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Developed nonsustained ankle clonus unilateral. 2 years ago had a neuro exam and this was not present. Is developing it a bad sign?

Clonus meaning?: Sometimes it means something. Non sustained clonus sometimes does not hold up from exam to exam- some people are not good at detecting this.

Clonus of any kind should indicate something happening in the spinal cord or the brain. If you have it on one side, it should be the brain. Sometimes the cause is not found however.

If it was found in a new exam, a work up will be planned. ...Read more

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Left non-sustained ankle clonus is nothing to be concerned about correct?

Left non-sustained ankle clonus is nothing to be concerned about correct?

Maybe, maybe not: If I find this in any patient over 2 years of age I am concerned. A more thorough evaluation would be needed for such a patient to rule out other issues. ...Read more

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So my son walking (13 months) is still a toddler? I may have from time to time ankle clonus (bits 1-2)? Yes or not?

So my son walking (13 months) is still a toddler? I may have from time to time ankle clonus (bits 1-2)? Yes or not?

A 13 month old..: ...Is a toddler. He is therefore expected to walk like a toddler. Because you have clonus does not mean he will have clonus.
I'm not certain what you are asking when you type "yes or not.". ...Read more

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Dr james. So my son (13 month) walking is still a toddler? I may have from time to time ankle clonus (bits 1-2)? It is normal? He is perfect!

Normal finding: I see no reason for you to obsess over this issue. The only way to know if your child has a normal nervous system is to have a complete exam done by a physician knowledgeable about kids in this age group. ...Read more

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22 months Boy have ankle clonus since he 3 weeks old. He have a normal milestone&posture. Could a normal child have a clonus for the rest in his life?

22 months Boy have ankle clonus since he 3 weeks old. He have a normal milestone&posture. Could a normal child have a clonus for the rest in his life?

Nl devel reassuring: It is very reassuring that your child's development has been very normal in spite of ankle clonus. It is not uncommon to see several beats of anke clonus in healthy children and for children to tiptoe with walking for the first few years, but continuous clonus is unusual and subtle signs of muscle tightness may show up in the future. Hopefully not. ...Read more

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Is it normal for babies to have ankle clonus during sleep?

Yes: Babies have ankle clonus as a normal finding both asleep or awake until they are about a year of age. It is a reflection of the immaturity of their nervous system and not a sign of damage as it would be for an older kid or adult. ...Read more

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My 24 months son have ankle clonus in both sides since newborn. Mostly clonus occured less than 5 beats, he has a good milestone. Is it normal?

My 24 months son have ankle clonus in both sides since newborn. Mostly clonus occured less than 5 beats, he has a good milestone. Is it normal?

Within Normal Limits: Ankle clonus is only considered pathologic with other abnormal neurologic findings on exam, a history of abnormal neurologic behavior, and sustained clonus. Your son has none of those findings, he is okay ...Read more

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GP found a few beats clonus in right ankle which wasn't present before. Referred to neuro. Is seeing a neuro necessary? Don't feel like it is anything

GP found a few beats clonus in right ankle which wasn't present before. Referred to neuro. Is seeing a neuro necessary? Don't feel like it is anything

More to story?: This can be seen in neurological disease and in some drug use. Is there more to the story the doctors should know so inappropriate tests are not wasted? ...Read more