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Biomechanical changes at the ankle joint after stroke

, : Biomechanical changes at the ankle joint after stroke. Journal of Neurology Neurosurgery & Psychiatry 54(2): 134-139

The resistance of the relaxed ankle to slow displacement over the joint movement range was measured on both sides of a group of hemiparetic stroke patients, in whom spasticity had been established for at least one year and who showed no clinical signs of contractures. The ankle joints of the age-matched normal subjects were flexible over most of the movement range, showing dramatically increasing stiffness only when the foot was dorsiflexed beyong, with a neutral range between, and a less dramatic increase in stiffness during plantarflexion. Hemiparetic patients showed identical curves to the normal subjects on the "healthy" side, ipsilateral to the causative cerebral lesion, but were significantly stiffer in dorsiflexion on the contralateral side, without change in the minimum stiffness range or during plantarflexion. Therefore significant changes in passive biomechanical properties occur at the affected ankle of hemiparetic subjects, predominantly as the result of a loss of compliance in the Achilles tendon, although an increase in the passive stiffness of the triceps surae may also occur. The contribution of these changes to the locomotor disability of hemiparetic patients is discussed.


PMID: 2019838

DOI: 10.1136/jnnp.54.2.134

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Christoff, J.; Tolentino, J.; Mawdsley, E.; Matushek, S.; Pitrak, D.; Weber, S.G., 2010: Optimizing empirical antimicrobial therapy for infection due to gram-negative pathogens in the intensive care unit: utility of a combination antibiogram. To determine whether the use of dual antimicrobial therapy based on the results of a combination antibiotic susceptibility report (antibiogram) increases the likelihood of selecting adequate empirical coverage in critically ill patients with infec...

Roberts, K.; Hemmings, A.J.; McBride, S.D.; Parker, M.O., 2017: Developing a 3-choice serial reaction time task for examining neural and cognitive function in an equine model. Large animal models of human neurological disorders are advantageous compared to rodent models due to their neuroanatomical complexity, longevity and their ability to be maintained in naturalised environments. Some large animal models spontaneousl...

Khikhlovskii, V.; Grabovetskii, B.; Dmitrash, V., 1978: Short-term forecast of the yielding capacity and sugar content of sugarbeets. Sakharnaia promyshlennost': (11) 54-57

Steranka, L.R.; DeHaas, C.J.; Vavrek, R.J.; Stewart, J.M.; Enna, S.J.; Snyder, S.H., 1987: Antinociceptive effects of bradykinin antagonists. European Journal of Pharmacology 136(2): 261-262

Anonymous, 2014: Retraction: Eafs control erythroid cell fate by regulating c-myb expression through Wnt signaling. Plos One 8(8): -

Srinivasan, C.; Sachdeva, R.; Morrow, W.Robert.; Gossett, J.; Chipman, C.W.; Imamura, M.; Jaquiss, R.D.B., 2009: Standardized management improves outcomes after the Norwood procedure. In the past decade, many advances in the care of patients undergoing the Norwood procedure (NP) have been reported, but management remains nonstandardized at many institutions. We studied the impact of a standardized management protocol for neonat...

Friedlander, A.H.; Mahler, M.; Norman, K.M.; Ettinger, R.L., 2009: Parkinson disease: systemic and orofacial manifestations, medical and dental management. More than 1.5 million Americans have Parkinson disease (PD), and this figure is expected to rise as the population ages. However, the dental literature offers little information about the illness. The authors conducted a MEDLINE search using the k...

Wang Zhaoyin; Wai Onyx W.H.; Cui Peng, 1999: Field investigation into debris flow mechanism. Debris flow carries huge amount of sediment, from clay finer than 10 (super -3) mm to huge stones of several meters in diameter. Clay, sand, gravels and boulders move in different mechanisms. Field investigations performed by the authors reveal th...

Clarke, R.; Brünner, N.; Katz, D.; Glanz, P.; Dickson, R.B.; Lippman, M.E.; Kern, F.G., 1989: The effects of a constitutive expression of transforming growth factor-alpha on the growth of MCF-7 human breast cancer cells in vitro and in vivo. It has been suggested that transforming growth factor-alpha (TGF-alpha) is a mitogenic autocrine growth factor for human breast cancer cells, responsible for mediating the mitogenic effects of 17 beta-estradiol (E2) in responsive cells. To test th...

Eisen, H.J.; Belland, S.E.; Newton, N.; Reddy, R.M.V.; Leopold, L.A.; Reddy, P.E., 1994: Enhanced efficiency of in vivo gene transfer into the thymus in rats using polylysine-folate transfection vectors. Circulation 90(4 PART 2): I361