Limits...
Proprioceptive precision is impaired in Ehlers-Danlos syndrome.

Clayton HA, Jones SA, Henriques DY - Springerplus (2015)

Bottom Line: We recently found that EDS patients were less precise than healthy controls when estimating their felt hand's position relative to visible peripheral reference locations, and that this deficit was positively correlated with the severity of joint hypermobility.We further explore proprioceptive abilities in EDS by having patients localize their non-dominant left hand at a greater number of workspace locations than in our previous study.We found that, although patients were just as accurate as controls, they were not as precise.

View Article: PubMed Central - PubMed

Affiliation: Centre for Vision Research, York University, Toronto, Canada ; Department of Psychology, York University, Toronto, Canada.

ABSTRACT
It has been suggested that people with Ehlers-Danlos syndrome (EDS), or other similar connective tissue disorders, may have proprioceptive impairments, the reason for which is still unknown. We recently found that EDS patients were less precise than healthy controls when estimating their felt hand's position relative to visible peripheral reference locations, and that this deficit was positively correlated with the severity of joint hypermobility. We further explore proprioceptive abilities in EDS by having patients localize their non-dominant left hand at a greater number of workspace locations than in our previous study. Additionally, we explore the relationship between chronic pain and proprioceptive sensitivity. We found that, although patients were just as accurate as controls, they were not as precise. Patients showed twice as much scatter than controls at all locations, but the degree of scatter did not positively correlate with chronic pain scores. This further supports the idea that a proprioceptive impairment pertaining to precision is present in EDS, but may not relate to the magnitude of chronic pain.

No MeSH data available.


Related in: MedlinePlus

a Side view of the general experimental set-up. b Six locations served as start and final target sites for the non-dominant left hand. c The robotic manipulandum restricted active movement of the left target-hand along a straight path from one target site (start) to another target site (target position). Participants reached with their seen right hand to the felt location of the unseen left target-hand.
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC4493259&req=5

Fig2: a Side view of the general experimental set-up. b Six locations served as start and final target sites for the non-dominant left hand. c The robotic manipulandum restricted active movement of the left target-hand along a straight path from one target site (start) to another target site (target position). Participants reached with their seen right hand to the felt location of the unseen left target-hand.

Mentions: A view of the experimental setup is provided in Figure 2. Subjects sat on a height-adjustable chair in front of a 90-cm-high table. They were positioned so that they could comfortably reach to all areas of a transparent 43 cm (length) × 33 cm (width), 3-mm-thick horizontal touch screen panel (resolution of 4,096 × 4,096 pixels; Keytec, Garland, TX) placed on top of an occluding platform (Figure 2a). The touch screen was used to record all reach endpoints. A complete description of the methodology is reported elsewhere (Jones et al. 2012b).Figure 2


Proprioceptive precision is impaired in Ehlers-Danlos syndrome.

Clayton HA, Jones SA, Henriques DY - Springerplus (2015)

a Side view of the general experimental set-up. b Six locations served as start and final target sites for the non-dominant left hand. c The robotic manipulandum restricted active movement of the left target-hand along a straight path from one target site (start) to another target site (target position). Participants reached with their seen right hand to the felt location of the unseen left target-hand.
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4493259&req=5

Fig2: a Side view of the general experimental set-up. b Six locations served as start and final target sites for the non-dominant left hand. c The robotic manipulandum restricted active movement of the left target-hand along a straight path from one target site (start) to another target site (target position). Participants reached with their seen right hand to the felt location of the unseen left target-hand.
Mentions: A view of the experimental setup is provided in Figure 2. Subjects sat on a height-adjustable chair in front of a 90-cm-high table. They were positioned so that they could comfortably reach to all areas of a transparent 43 cm (length) × 33 cm (width), 3-mm-thick horizontal touch screen panel (resolution of 4,096 × 4,096 pixels; Keytec, Garland, TX) placed on top of an occluding platform (Figure 2a). The touch screen was used to record all reach endpoints. A complete description of the methodology is reported elsewhere (Jones et al. 2012b).Figure 2

Bottom Line: We recently found that EDS patients were less precise than healthy controls when estimating their felt hand's position relative to visible peripheral reference locations, and that this deficit was positively correlated with the severity of joint hypermobility.We further explore proprioceptive abilities in EDS by having patients localize their non-dominant left hand at a greater number of workspace locations than in our previous study.We found that, although patients were just as accurate as controls, they were not as precise.

View Article: PubMed Central - PubMed

Affiliation: Centre for Vision Research, York University, Toronto, Canada ; Department of Psychology, York University, Toronto, Canada.

ABSTRACT
It has been suggested that people with Ehlers-Danlos syndrome (EDS), or other similar connective tissue disorders, may have proprioceptive impairments, the reason for which is still unknown. We recently found that EDS patients were less precise than healthy controls when estimating their felt hand's position relative to visible peripheral reference locations, and that this deficit was positively correlated with the severity of joint hypermobility. We further explore proprioceptive abilities in EDS by having patients localize their non-dominant left hand at a greater number of workspace locations than in our previous study. Additionally, we explore the relationship between chronic pain and proprioceptive sensitivity. We found that, although patients were just as accurate as controls, they were not as precise. Patients showed twice as much scatter than controls at all locations, but the degree of scatter did not positively correlate with chronic pain scores. This further supports the idea that a proprioceptive impairment pertaining to precision is present in EDS, but may not relate to the magnitude of chronic pain.

No MeSH data available.


Related in: MedlinePlus