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Ankle clonus. Clonus is a set of involuntary and rhythmic muscular contractions and relaxations. 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). [1]
A person with spastic CP will commonly show, in addition to higher muscle tone, persistent primitive reflexes, greater stretch reflexes, plantar reflex, and ankle clonus. [10] A third of people with cerebral palsy have seizures - this is most common in spastic CP. [11] Audiovisual, cognitive compromise and behavioral disorders can occur.
Clonus results due to an increased motor neuron excitation (decreased action potential threshold) and is common in muscles with long conduction delays, such as the long reflex tracts found in distal muscle groups. [7] Clonus is commonly seen in the ankle but may exist in other distal structures as well, such as the knee or spine. [8]
exaggerated deep tendon reflexes including spasticity, and clonus (a series of involuntary rapid muscle contractions) Such signs are collectively termed the "upper motor neuron syndrome". Affected muscles typically show multiple signs, with severity depending on the degree of damage and other factors that influence motor control. In ...
Peroneal nerve paralysis is a paralysis on common fibular nerve that affects patient’s ability to lift the foot at the ankle. The condition was named after Friedrich Albert von Zenker . Peroneal nerve paralysis usually leads to neuromuscular disorder, peroneal nerve injury, or foot drop which can be symptoms of more serious disorders such as ...
The ankle jerk reflex, also known as the Achilles reflex, occurs when the Achilles tendon is tapped while the foot is dorsiflexed. It is a type of stretch reflex that tests the function of the gastrocnemius muscle and the nerve that supplies it.
Image credits: Michael Buckner / Getty #3 Scott Disick. Boxes of Mounjaro, which is known for its weight loss effects, were found stacked in Scott Disick’s fridge on a past episode of The ...
[15] [41] During pregnancy brisk or hyperactive reflexes are common, however, ankle clonus is a sign of neuromuscular irritability that usually reflects severe pre-eclampsia and also can precede eclampsia. [93] Magnesium sulfate is used to prevent convulsions in cases of severe pre-eclampsia.