Dictionary > Lead-pipe rigidity

Lead-pipe rigidity

Definition
noun
A hypokinetic disorder characterized by the inflexibility or stiffness of the limb that is maintained equally throughout the passive flexion
Supplement
Lead-pipe rigidity is a type of movement disorder, i.e. a hypokinesia that pertains to decreased bodily movements. The loss is due to a disruption in the basal ganglia. An example of a condition exhibiting a hypokinetic disorder is the Parkinson’s disease. Patients suffering from Parkinson’s disease would experience rigidity in their muscles. They would also not be able to produce movement in the affected muscle. The various forms of hypokinetic disorders include akinesia, bradykinesia, dysarthria, dyskinesia, dystonia, freezing, neuroleptic malignant syndrome, postural instability, and rigidity.
Rigidity is characterized by an increase in muscle tone. This causes resistance to externally imposed joint movements.1 It affects both agonist muscles and antagonist muscles. It is associated with patients with Parkinson’s disease. Two forms of rigidity observed are the cogwheel rigidity and the lead-pipe type. The difference between the two is that in cogwheel rigidity there is tremor superimposed with background increase of tone whereas in lead-pipe rigidity there is a relatively uniform rigidity in both agonist and antagonist muscle group.2
See also:

  • Parkinson’s disease
  • hypokinesia

Reference(s):

1 O’Sullivan, Susan B.; Schmitz, Thomas J. (2007). “Parkinson’s Disease”. Physical Rehabilitation 5. Philadelphia: F.A Davis Company. pp. 856–857.

2 Teddy Poh. (2013). SPASTICITY VS RIGIDITY. Retrieved from https://teddybrain.wordpress.com/2013/01/01/spasticity-vs-rigidity/


You will also like...

Freshwater Ecology
Freshwater Ecology

Freshwater ecology focuses on the relations of aquatic organisms to their freshwater habitats. There are two forms of co..

Cambial cells
Plant Tissues

Plant organs are comprised of tissues working together for a common function. The different types of plant tissues are m..

Lights' Effect on Growth
Lights’ Effect on Growth

This tutorial elaborates on the effect of light on plant growth. It describes how different plants require different amo..

running freshwater community
Running Water Freshwater Community Factors

This tutorial noted some of the physical and chemical factors that provide the framework of a running water community in..

Crossing Over and Genetic Diversity
Inheritance and Probability

Gregor Mendel, an Austrian monk, is most famous in this field for his study of the phenotype of pea plants, including ..

Population Growth and Survivorship
Population Growth and Survivorship

This lesson looks at population attributes, regulation, and growth. It also covers population genetics, particularly gen..