Quantification of upper extremity function using kinematic analysis

Ramos, Edwardo; Latash, Michael P.; Hurvitz, Edward A.; Brown, Susan H.

doi:10.1016/s0003-9993(97)90162-3

Cited by 36 publications

(30 citation statements)

References 18 publications

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“…This finding suggests that the acceleration phase of the upward movement was in agreement with the planned trajectory, but that the deceleration of the reach in order to grasp the object needed correction. In agreement with other studies on reaching in sitting, the CP group showed significantly longer reach movement duration than the controls (14,15,19). In the reach investigated in our study the duration of the acceleration phase of both upward and forward velocity was about the same (30%) in controls while the duration of the deceleration phase of the forward velocity was significantly longer compared with the upward velocity.…”

Section: Reach Kinematics During Supported Standingsupporting

confidence: 92%

Reach performance and postural adjustments during standing in children with severe spastic diplegia using dynamic ankle-foot orthoses

Näslund¹,

Sundelin²,

Hirschfeld³

2007

Acta Derm Venereol

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Objective: To investigate the co-ordination between reaching, ground reaction forces and muscle activity in standing children with severe spastic diplegia wearing dynamic anklefoot orthoses compared with typically developing children. Design: Clinical experimental study. Subjects: Six children with spastic diplegia (Gross Motor Function Classification System level III-IV) and 6 controls. Methods: Ground reaction forces (AMTI force plates), ankle muscle activity (electromyography and displacement of the hand (ELITE systems) were investigated while reaching for an object. Results: For the children with severe spastic diplegia who were wearing dynamic ankle-foot orthoses, co-ordination between upward and forward reach velocity differed regarding the temporal sequencing and amplitude of velocity peaks. During reaching, these children lacked interplay of pushing force beneath the reach leg and braking force beneath the non-reach leg and co-ordinated ankle muscle activity, compared with controls. Conclusion:The results suggest differences in reach performance and postural adjustments for balance control during a reaching movement in standing between children with spastic diplegia Gross Motor Function Classification System level III-IV, wearing dynamic ankle-foot orthoses compared with typically developing children.

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Section: Reach Kinematics During Supported Standingsupporting

confidence: 92%

Reach performance and postural adjustments during standing in children with severe spastic diplegia using dynamic ankle-foot orthoses

Näslund¹,

Sundelin²,

Hirschfeld³

2007

Acta Derm Venereol

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“…The disorder is mainly characterized by irregular and hypermetric (overshoot) movement trajectories of the arm and hand during repeated pointing or reaching tasks (BonnefoiKyriacou et al 1995;Ramos et al 1997;Topka et al 1998a). This lack of movement coordination is thought to be due in part to diculties in regulating muscle interaction torques (Bastian et al 1996;Riener and Topka et al 1998b).…”

Section: Discussionmentioning

confidence: 99%

High curvature and jerk analyses of arm ataxia

Goldvasser

McGibbon

Krebs

2001

Biological Cybernetics

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We investigated high curvature analysis (HCA) and integrated absolute jerk (IAJ) for differrentiating healthy and cerebellopathy (CB) patients performing pointing tasks. Seventeen CB patients and seventeen healthy controls were required to move a pointer at their preferred pace between two 50.8 cm laterally spaced targets while standing with theirarm extended in front of their body. HCA was used to quantify the frequency of sharp turns in the horizontal-plane (anterior-posterior and medio-lateral) velocity trajectory of the hand-held pointer. IAJ was assesssed by integration of absolute jerk (second time derivative of velocity) time histories in the anterior-posterior and medio-lateral directions. HCA scores and IAJ scores were then compared between CB patients and healthy controls; for both analyses, higher scores indicateless smooth movements. We hypothesized that CB patients would have less smooth movement trajectories than healthy controls due to upper extremity ataxia asssociated with cerebellar disease and degeneration. We found that CB patients had higher HCA scores than healthy controls (P = 0.014). Although CB patients had higher IAJ scores in both anterior-posterior (P = 0.060)and medio-lateral (P = 0.231) directions compared to the healthy controls, the differences were not significant. The difference in sensitivity between the HCA andthe IAJ analysis might be explained by primitive neural activation commands, ubiquitous though only evident with some cerebellar dysfunctions, which produce submovements which are themselves minimal jerk curves. We conclude that HCA may be a useful tool for quantifying upper extremity ataxia in CB patients performing a repeated pointing task.

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“…39 Other measures may be useful for rating severity of dystonia and rigidity, 40 -42 including the Barry-Albright Dystonia scale, the Burke-Fahn-Marsden dystonia rating scale, the Unified Dystonia Rating Scale, and the Unified Parkinson's Disease Rating Scale. Quantitative kinematic and electromyelogram analysis provides an additional set of methods for determining the severity of clinical findings, 13,16,38,43,44 although these techniques have been more often applied to spasticity than to dystonia or rigidity.…”

Section: Measures Of Severitymentioning

confidence: 99%

Classification and Definition of Disorders Causing Hypertonia in Childhood

et al. 2003

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ABSTRACT.Objective. This report describes the consensus outcome of an interdisciplinary workshop that was held at the National Institutes of Health in April 2001. The purpose of the workshop and this article are to define the terms "spasticity," "dystonia," and "rigidity" as they are used to describe clinical features of hypertonia in children. The definitions presented here are designed to allow differentiation of clinical features even when more than 1 is present simultaneously.Methods. A consensus agreement was obtained on the best current definitions and their application in clinical situations.Results. "Spasticity" is defined as hypertonia in which 1 or both of the following signs are present: 1) resistance to externally imposed movement increases with increasing speed of stretch and varies with the direction of joint movement, and/or 2) resistance to externally imposed movement rises rapidly above a threshold speed or joint angle. "Dystonia" is defined as a movement disorder in which involuntary sustained or intermittent muscle contractions cause twisting and repetitive movements, abnormal postures, or both. "Rigidity" is defined as hypertonia in which all of the following are true: 1) the resistance to externally imposed joint movement is present at very low speeds of movement, does not depend on imposed speed, and does not exhibit a speed or angle threshold; 2) simultaneous co-contraction of agonists and antagonists may occur, and this is reflected in an immediate resistance to a reversal of the direction of movement about a joint; 3) the limb does not tend to return toward a particular fixed posture or extreme joint angle; and 4) voluntary activity in distant muscle groups does not lead to involuntary movements about the rigid joints, although rigidity may worsen.Conclusion. We have provided a set of definitions for the purpose of identifying different components of childhood hypertonia. We encourage the development of clinical rating scales that are based on these definitions, and we encourage research to relate the degree of hypertonia to the degree of functional ability, change over time, and societal participation in children with motor disorders. Pediatrics 2003;111:e89 -e97. URL: http://www. pediatrics.org/cgi/content/full/111/1/e89; spasticity, dystonia, rigidity, movement disorders, hypertonia, pediatric, childhood.ABBREVIATION. CP, cerebral palsy.

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Quantification of upper extremity function using kinematic analysis

Cited by 36 publications

References 18 publications

Reach performance and postural adjustments during standing in children with severe spastic diplegia using dynamic ankle-foot orthoses

Reach performance and postural adjustments during standing in children with severe spastic diplegia using dynamic ankle-foot orthoses

High curvature and jerk analyses of arm ataxia

Classification and Definition of Disorders Causing Hypertonia in Childhood

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