U.S. doctors online nowAsk doctors free
A 39-year-old member asked:

What is the meaning of "clasp-knife spasticity"?

2 doctor answers3 doctors weighed in
Dr. Felix Brizuela
Neurology 33 years experience
Involuntary tightness: This occurs with certain types of strokes, and with spinal cord injuries. Involuntary tightening of the flexor muscles, with intermittent gear as you try to passively straighten a muscle out or extended from the flex position.
Dr. William Goldie
Pediatric Neurology 49 years experience
Spastic tone: In patients with spasticity the arms and legs are stiff and move with difficulty. A very specific form of stiffness will cause a form of release during movement which is similar to the sudden release when a clasp knife releases. The tone can be very tight, then releases, then tightens again. This is the classic findings in spastic cerebral palsy.

Related questions

A 47-year-old member asked:
2 doctor answers4 doctors weighed in
A member asked:
1 doctor answer2 doctors weighed in
A 50-year-old member asked:
2 doctor answers6 doctors weighed in
A 39-year-old member asked:
2 doctor answers5 doctors weighed in
A 29-year-old member asked:
1 doctor answer6 doctors weighed in
Last updated Sep 28, 2016

People also asked

Related topics

Connect with a U.S. board-certified doctor by text or video anytime, anywhere.
24/7 visits - just $39!
50% off with $15/month membership

Disclaimer:

Content on HealthTap (including answers) should not be used for medical advice, diagnosis, or treatment, and interactions on HealthTap do not create a doctor-patient relationship. Never disregard or delay professional medical advice in person because of anything on HealthTap. Call your doctor or 911 if you think you may have a medical emergency.