Azimuth errors in pointing to remembered targets under extreme head rotations

Fookson, Olga; Сметанин, Б. Н.; Berkinblit, Michel; Adamovich, Sergey; Feldman, Gregory; Poizner, Howard

doi:10.1097/00001756-199404000-00008

Cited by 21 publications

(20 citation statements)

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“…Cervical positions are known to alter the accuracy of upper limb movement in healthy people [53-55] and elbow joint position error in subjects with whiplash associated disorders [56]. The head may be used as a reference for the performance of upper limb movements and the altered proprioception of the neck may introduce error in the mechanism of central control of movement.…”

Section: Discussionmentioning

confidence: 99%

Effect of head and limb orientation on trunk muscle activation during abdominal hollowing in chronic low back pain

Parfrey

Gibbons

Drinkwater

et al. 2014

BMC Musculoskelet Disord

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BackgroundIndividuals with chronic low back pain (CLBP) have altered activations patterns of the anterior trunk musculature when performing the abdominal hollowing manœuvre (attempt to pull umbilicus inward and upward towards the spine). There is a subgroup of individuals with CLBP who have high neurocognitive and sensory motor deficits with associated primitive reflexes (PR). The objective of the study was to determine if orienting the head and extremities to positions, which mimic PR patterns would alter anterior trunk musculature activation during the hollowing manoeuvre.MethodsThis study compared surface electromyography (EMG) of bilateral rectus abdominis (RA), external oblique (EO), and internal obliques (IO) of 11 individuals with CLBP and evident PR to 9 healthy controls during the hollowing manoeuvre in seven positions of the upper quarter.ResultsUsing magnitude based inferences it was likely (>75%) that controls had a higher ratio of left IO:RA activation with supine (cervical neutral), asymmetrical tonic neck reflex (ATNR) left and right, right cervical rotation and cervical extension positions. A higher ratio of right IO:RA was detected in the cervical neutral and ATNR left position for the control group. The CLBP group were more likely to show higher activation of the left RA in the cervical neutral, ATNR left and right, right cervical rotation and cervical flexion positions as well as in the cervical neutral and cervical flexion position for the right RA.ConclusionsIndividuals with CLBP and PR manifested altered activation patterns during the hollowing maneuver compared to healthy controls and that altering cervical and upper extremity position can diminish the group differences. Altered cervical and limb positions can change the activation levels of the IO and EO in both groups.

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Section: Discussionmentioning

confidence: 99%

Effect of head and limb orientation on trunk muscle activation during abdominal hollowing in chronic low back pain

Parfrey

Gibbons

Drinkwater

et al. 2014

BMC Musculoskelet Disord

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“…4,5,11 The increased elbow JPE seen in the WAD participants may be explained by the observation that people with persistent neck pain after WAD injury have diminished proprioceptive acuity for head and neck movement. 4,5,11 The increased elbow JPE seen in the WAD participants may be explained by the observation that people with persistent neck pain after WAD injury have diminished proprioceptive acuity for head and neck movement.…”

Section: Mechanisms For the Effect Of Head And Neck Position On Uppermentioning

confidence: 99%

“…3 In addition, there are clinical reports of fumbling or clumsiness in WAD patients. [4][5][6] As people with WAD have been shown to have deficits in neck proprioception, [7][8][9] it was hypothesized that the planning and performance of upper limb movement would be compromised to a greater degree during changes in head and neck position in people with WAD, than in healthy individuals. [4][5][6] As people with WAD have been shown to have deficits in neck proprioception, [7][8][9] it was hypothesized that the planning and performance of upper limb movement would be compromised to a greater degree during changes in head and neck position in people with WAD, than in healthy individuals.…”

mentioning

confidence: 99%

Changes in Head and Neck Position Have a Greater Effect on Elbow Joint Position Sense in People With Whiplash-associated Disorders

Knox

Beilstein

Charles

et al. 2006

The Clinical Journal of Pain

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“…Nevertheless, there is increasing evidence that extraretinal receptors contribute to the internal spatial representation as well. It has been shown that the subject's appreciation of the position of a visual target and/or subjective 'straight ahead' is affected by eye proprioceptive (Roll and Roll, 1987;Rossetti et al, 1994a), neck proprioceptive (Biguer et al, 1988;Taylor and McCloskey, 1991;Karnath et al, 1993;Fookson et al, 1994), and vestibular inputs (Popov et al, 1990;Karnath et al, 1994). However numerous contributing sensory inputs cannot ensure a sufficient accuracy of the resulting internal spatial representation unless visual input comes into play.…”

Section: Introductionmentioning

confidence: 99%

“…However numerous contributing sensory inputs cannot ensure a sufficient accuracy of the resulting internal spatial representation unless visual input comes into play. A large number of papers devoted to studying the errors in pointing to remembered target locations is above all indicative of this fact (Soechting and Flanders, 1989;Darling and Miller, 1993;Adamovich et al, 1994;Fookson et al, 1994).…”

Section: Introductionmentioning

confidence: 99%

Effect of Body Orientation with Respect to Gravity on Directional Accuracy of Human Pointing Movements

Сметанин

Popov

1997

Eur J of Neuroscience

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Errors in pointing to remembered target locations were measured in normal subjects in the upright posture and in a supine or prone lying position, three conditions that differed in the orientation of the moving arm with respect to gravity. Vertical errors, or, more strictly, errors along the body axis, were significantly larger in both supine and prone lying positions as compared with the vertical posture. Subjects' orientation with respect to gravity produced a consistent error pattern, i.e. subjects pointed below the remembered target locations in the vertical posture and above them under the two lying conditions, in the body-related co-ordinates. On the contrary, variable error (the confidence ellipse) was differentially affected by the orientation of the movement trajectory with respect to gravity. In the supine body position the variable error was larger, and in the prone position it was smaller than in the upright posture. The finding of gravity-related bias in pointing errors suggests that the motor programme generated in the lying position is not modified to adapt to an altered orientation with respect to gravity.

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Azimuth errors in pointing to remembered targets under extreme head rotations

Cited by 21 publications

References 0 publications

Effect of head and limb orientation on trunk muscle activation during abdominal hollowing in chronic low back pain

Effect of head and limb orientation on trunk muscle activation during abdominal hollowing in chronic low back pain

Changes in Head and Neck Position Have a Greater Effect on Elbow Joint Position Sense in People With Whiplash-associated Disorders

Effect of Body Orientation with Respect to Gravity on Directional Accuracy of Human Pointing Movements

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