Clonus When Stretching? (Question)

Clonus is a self-sustained, oscillating stretch reflex induced when the clinician briskly stretches a hyperreflexic muscle and then continues to apply stretching force to that muscle.

  • Clonus occurs when muscle stretch reflexes take place in series and relaxation of one muscle triggers the contraction in another muscle, resulting in the rapid alternating contraction and relaxation of antagonistic muscles.

What are some reasons a person would have clonus to a stretch response?

Other causes of clonus include anything that has the potential to affect the nerves or brain cells, including:

  • cerebral palsy.
  • Lou Gehrig’s disease.
  • anoxic brain injury.
  • hereditary spastic paraparesis.
  • kidney or liver failure.
  • overdoses of drugs such as Tramadol, which is a strong painkiller.

What does positive clonus indicate?

Clonus is a sign of certain neurological conditions, particularly associated with upper motor neuron lesions involving descending motor pathways, and in many cases is, accompanied by spasticity (another form of hyperexcitability).

What might Hyperreflexia with clonus indicate?

Therefore, clonus is considered a manifestation of upper motor neuron pathology and this explains why other signs of hyperreflexia generally accompany it. The rhythm of a given joint’s clonus is defined by the nervous anatomy involved in that joint’s stretch reflex.

You might be interested:  How To Play League With 3 Monitors Without Stretching It?

How is clonus triggered?

Clonus occurs when muscle stretch reflexes take place in series and relaxation of one muscle triggers the contraction in another muscle, resulting in the rapid alternating contraction and relaxation of antagonistic muscles.

What does it mean if you have clonus?

Clonus is a type of neurological condition that creates involuntary muscle contractions. This results in uncontrollable, rhythmic, shaking movements. People who experience clonus report repeated contractions that occur rapidly. It’s not the same as an occasional muscle contraction.

What does positive clonus mean in pregnancy?

Although brisk or hyperactive reflexes are common during pregnancy, clonus is a sign of neuromuscular irritability that usually reflects severe pre-eclampsia.

What is extensor plantar response?

Definition: A reflex characterized by upward movement of the great toe and an outward movement of the rest of the toes, when the sole of the foot is stroked. It is a normal reflex up to the age of two. Its presence beyond that age indicates neurological damage.

What is the difference between clonus and myoclonus?

Myoclonus is a brief, involuntary, irregular (lacking rhythm) twitching (different from clonus, which is rhythmic/ regular) of a muscle or a group of muscles.

What causes Hyperreflexes?

Common causes of hyperreflexia include focal brain lesions (typically causing unilateral hyperreflexia), cervical myelopathy, and motor neuron disease (amyotrophic lateral sclerosis, ALS). The latter is characterized by a combination of upper and lower motor neuron findings.

How do you test for clonus in pregnancy?

Clonus at the ankle is tested by rapidly flexing the foot into dorsiflexion (upward), inducing a stretch to the gastrocnemius muscle. Subsequent beating of the foot will result, however only a sustained clonus (greater than 3 beats) is considered abnormal.

You might be interested:  What Is The Safest Type Of Stretching For Beginners?

Do babies have clonus?

Clonus can be physiologic, for instance, term infants can be hyperreflexic, and a few beats of clonus can be a normal finding in this population; however, most infants will not exhibit this finding, and most infants who will go on to demonstrate cerebral palsy will not exhibit clonus.

Is clonus a tremor?

Usually clonus is rarely misinterpreted as tremor. On clinical examination, passive stretching of the muscles increases the force of clonus but not of tremor.

Leave a Reply

Your email address will not be published. Required fields are marked *