The dependence of ipsilesional aiming deficits on task demands, lesioned hemisphere, and apraxia

Hermsdörfer, Joachim; Blankenfeld, Hannes; Goldenberg, Georg

doi:10.1016/s0028-3932(03)00097-6

Cited by 39 publications

(38 citation statements)

References 47 publications

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“…One previous study (Hermsdorfer, Blankenfeld, & Goldenberg, 2003) compared a reaching movement to the nose to reaching movements to objects in the environment and found no obvious difference between the two movement types. Critically, the authors tested only one body-directed movement, and therefore any conclusions drawn from this null result should be taken cautiously.…”

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confidence: 94%

Deficits in Movement Planning and Intrinsic Coordinate Control in Ideomotor Apraxia

Jax

Buxbaum

Moll

2006

Journal of Cognitive Neuroscience

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Abstract& Two central issues in the field of motor control are the coordinate frame in which movements are controlled and the distinction between movement planning and online correction. In this study we used these issues to frame several hypotheses about the deficits underlying ideomotor apraxia (IMA). In particular, we examined whether ideomotor apraxics exhibited (1) deficits in movement control in intrinsic (body relative) coordinates with better control in extrinsic (workspace relative) coordinates, (2) deficits in movement planning that are compensated for by an overreliance on online correction, or (3) both deficits. Patients with IMA and two comparison groups performed movement tasks that relied preferentially on either intrinsic or extrinsic coordinate control when online correction was either possible or impossible. Participants performed posture imitation and grasp imitation movements to body-and object-relative end positions in the presence or absence of visual feedback. Consistent with the intrinsic coordinate control hypothesis, patients with IMA showed a significantly greater disparity than the other two groups between movements made to bodyrelative and object-relative targets as well as between imitation of meaningless postures and grasping. Consistent with the correction overreliance hypothesis, the IMA group was more disrupted than the other groups by the removal of vision. Thus, IMA patients exhibit behavioral patterns consistent with both deficient intrinsic coordinate control and overreliance upon visual feedback. Finally, lesion analysis suggests that damage to the left inferior parietal lobe (Brodmann's areas 39 and 40) may play a key role in both behavioral deficits. &

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confidence: 94%

Deficits in Movement Planning and Intrinsic Coordinate Control in Ideomotor Apraxia

Jax

Buxbaum

Moll

2006

Journal of Cognitive Neuroscience

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“…Besides severe language dysfunctions, patients with left hemispheric injuries tend to demonstrate a greater frequency of apraxias 4,5 . Motor activities that require planning are more related to the left hemisphere and are therefore more aff ected after left hemispheric injuries 4 .…”

Section: Introductionmentioning

confidence: 99%

“…In fact, the lack of careful control of those variables in many studies indicates the need for cautious interpretation of their results. Care is even more important in face of the lack of control of hand dominance of the studied patients 5,9,10,14,21,23,24 , the exclusion of patients with dysphasia 22,24,25 and hemineglect 14 . Th ese procedures obviously limit the conclusions that can be drawn from the referred studies.…”

Section: Introductionmentioning

confidence: 99%

“…Because the left hemisphere plays a lager role in motor behavior 4,5,26 , it was hypothesized that patients with left hemispheric injuries would demonstrate greater initial defi cits and slower recovery of the motor functions of gait and functional independence after injury assessed in this study. On the other hand, because the right hemisphere plays a larger role on spatial orientation 17,19,27 and posture 21 , it was hypothesized that patients with right hemispheric injuries would demonstrate greater defi cits and slower recovery rates of the postural and spatial attention functions after injury.…”

Section: Introductionmentioning

confidence: 99%

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Estudo comparativo entre a relação do hemisfério acometido no acidente vascular encefálico e a evolução funcional em indivíduos destros

Voos¹,

Valle²

2008

Rev. bras. fisioter.

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“…However, deficits in the ipsilesional hemisphere, considered "healthy", or "less affected", are also observed (5 -8). For example, following a stroke, people have an inferior performance when using the ipsilesional upper limb in reaching tasks (9,10) or even in clinical tests (7,8,11,12), when compared to those who have not had a stroke.…”

Section: Introductionmentioning

confidence: 99%

Ipsilesional upper limb performance in stroke individuals: relationship among outcomes of different tests used to assess hand function

Cunha¹,

Freitas²,

Menezes³

et al. 2016

Fisioter. mov.

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Introduction: Stroke individuals have sensorimotor repercussions on their ipsilesional upper limb. Therefore, it is important to use tests that allow an adequate assessment and follow-up of such deficits. Physical and occupational therapists commonly use maximal grip strength tests to assess the functional condition of stroke individuals. However, one could ask whether a single test is able to characterize the hand function in this population. Objective: The aim of this study was to investigate the relationship among outcomes of different tests frequently used to describe the function of the hand in the ipsilesional upper limb of stroke individuals. Methods: Twenty-two stroke individuals performed four hand function tests: maximal handgrip strength (HGSMax), maximal pinch grip strength (PGSMax), Jebsen-Taylor Hand Function Test (JTHFT) and Nine Hole Peg Test (9-HPT). All tests were performed with the ipsilesional hand. Pearson's correlation analyses were performed. Results: the results indicated a moderate and positive relationship between HGSMax and JTHFT (r = 0.50) and between JTHFT and 9-HPT (r = 0.55). Conclusion: We conclude that the existence of only moderate relationships between test outcomes demonstrates the need to use at least two instruments to better describe the ipsilesional hand function of stroke individuals.

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The dependence of ipsilesional aiming deficits on task demands, lesioned hemisphere, and apraxia

Cited by 39 publications

References 47 publications

Deficits in Movement Planning and Intrinsic Coordinate Control in Ideomotor Apraxia

Deficits in Movement Planning and Intrinsic Coordinate Control in Ideomotor Apraxia

Estudo comparativo entre a relação do hemisfério acometido no acidente vascular encefálico e a evolução funcional em indivíduos destros

Ipsilesional upper limb performance in stroke individuals: relationship among outcomes of different tests used to assess hand function

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