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A 30-year-old member asked:

what is the main difference between rigidity and spasticity?

1 doctor answer3 doctors weighed in
Dr. Jay Rosenfeld
A Verified Doctoranswered
A US doctor answeredLearn more
See below: It is mostly the quality of the movement. With rigidity, the muscle tone stays pretty much the same when someone moves the limb, there is constant resistance to movement. It has also been called "lead pipe" rigidity. In spasticity, there is initial resistance to movement and then the resistance gives way. This is called "clasp-knife" spasticity. Rigidity is often seen in parkinsons.

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A 33-year-old member asked:

Looked up symptoms in medical book. What is rigidity?

1 doctor answer1 doctor weighed in
Dr. Jay Rosenfeld
A Verified Doctoranswered
A US doctor answeredLearn more
Rigidity: Rigidity is an abnormality of muscle tone that can occur in certain neurological conditions. It is a resistance to movement. An example of this is Parkinson's disease which can cause rigidity. That is not the only condition that can cause rigidity though.
A 22-year-old male asked:

How do we differentiate spasticity and rigidity? What are the differences?

2 doctor answers4 doctors weighed in
Dr. Bennett Machanic
Neurology 52 years experience
See below: Look at the muscle effect of spasticity to be similar to a pocket knife where there is a catch-like phenomenon, and the signs involve the antigravity muscles, like the leg extensors. Rigidity, like parkinson's is constant, on both flexion and extension, and no sudden catch can be exhibited.
Miami, FL
A 25-year-old female asked:

Has anyone ever heard of tibialis posterior spasticity from long term ssri use?

1 doctor answer1 doctor weighed in
Dr. Marlis Gonzalez fernandez
Physical Medicine and Rehabilitation 13 years experience
No: Ssris have been known to worsen spasticity in some cases and cause other muscle problems in others but not spasticity. Spasticity isolated to one muscle would be rare too. Muscle symptoms usually resolve when the medication is stopped. I see many patients with spasticity and they all have a neurological injury/disease.
A 39-year-old member asked:

What part of the body provides structure and rigidity?

1 doctor answer3 doctors weighed in
Dr. Carol Van der Harst
Physical Medicine and Rehabilitation 35 years experience
The bones: Our bones, held together at joints and by ligaments create our structure and height. The cranium (head) is a complex group of bones that protects the brain and special organs (eyes and ears) with its rigid structure.
A 37-year-old member asked:

Difference between spasticity and rigidity?

2 doctor answers2 doctors weighed in
Dr. James Goodrich
Neurosurgery 39 years experience
Rigidity: Spasticity is the a hyperactive hand or arm when their is decreased ability to control the movement of the extremity and rigidity is a situation where the patient moves in a very stiff and robotic fashion. There is not a natural flow to the muscular movement.

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Last updated Jun 3, 2017
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