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...

Homeostasis by water regulation
Homeostasis of Organism Water Regulation

Osmoregulation is the regulation of water concentrations in the bloodstream, effectively controlling the amount of water..

Transpiration
Water in Plants

The movement of molecules (specifically, water and solutes) is vital to the understanding of plant processes. This tuto..

Cell Biology
Cell Biology

The cell is defined as the fundamental, functional unit of life. Some organisms are comprised of only one cell whereas o..

Cell Respiration
Cell Respiration

Cell respiration is the process of creating ATP. It is "respiration" because it utilizes oxygen. Know the different stag..

Adaptive Radiation
Adaptive Radiation

The diversification of several new species from a recent ancestral source, each adapted to utilize or occupy a vacant ad..

mRNA
Protein Synthesis

Part of the genetic information is devoted to the synthesis of proteins. mRNA, a type of RNA, is produced as a transcri..