Effects of Hand and Age upon Abductive and Adductive Movements: A Kinematic Analysis

Morgan, Michaela; Bradshaw, John L.; Phillips, James G.; Mattingley, Jason B.; Iansek, Robert; Bradshaw, Judy A.

doi:10.1006/brcg.1994.1030

Cited by 30 publications

(21 citation statements)

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“…Nevertheless, directional differences in reaction time were not significant for the touchpad because gross limb movements that extended into the left or right hemispaces (Morgan et al, 1994) were not required. Cursor positioning using a touchpad primarily deals with exocentric coordinate systems rather than egocentric coordinate systems (see Bradshaw et al, 1987), hence different mechanisms would likely be involved.…”

Section: Discussionmentioning

confidence: 93%

Kinematic Analysis of Cursor Trajectories Controlled With a Touchpad

Dillen¹,

Phillips²,

Meehan³

2005

International Journal of Human-Computer Interaction

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To investigate the characteristics of a computer touchpad as a pointing device, 14 participants used their right hand to manipulate the touchpad on a laptop computer. They were required to move a cursor over different distances (7.5 cm, 15 cm) from a home location to targets of different diameters (8 mm, 16 mm), situated to the upper left, middle, or right of a computer screen. A kinematic analysis of movement onsets and cursor trajectories indicated the nature of inefficiencies of the touchpad compared with other devices, primarily excessive submovements. Upper leftward movements were poorer, which can be explained by asymmetries in the finger-wrist system. This result implies that screen accessibility can vary as a function of users' interaction with cursor controllers and that the default placements of key icons might need to vary as a consequence.

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Section: Discussionmentioning

confidence: 93%

Kinematic Analysis of Cursor Trajectories Controlled With a Touchpad

Dillen¹,

Phillips²,

Meehan³

2005

International Journal of Human-Computer Interaction

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“…The strong effect of age is in line with findings of other groups. Morgan et al [59] reported on an age effect upon abductive and adductive movements in a kinematic analysis, with older healthy subjects exhibiting more asymmetries and lower peak velocities than younger healthy subjects. Bellgrove et al [60] could demonstrate that older adults produced slower and less efficient movements.…”

Section: Discussionmentioning

confidence: 99%

Kinematic Analysis of Handwriting Movements in Patients with Alzheimer’s Disease, Mild Cognitive Impairment, Depression and Healthy Subjects

Schröter¹,

Mergl²,

Bürger³

et al. 2003

Dement Geriatr Cogn Disord

130

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A variety of studies have demonstrated that motor disorders, parkinsonism and extrapyramidal motor symptoms (EPMS) are common in patients with Alzheimer’s disease (AD). Several studies have reported an association of EPMS with severity, progression and poor prognosis of AD. The majority of these studies used clinical assessments for the rating of EPMS. In this study, kinematic handwriting analysis was used to quantify differences in fine hand motor function in patients with probable AD and mild cognitive impairment (MCI, as an assumed initial stage of AD) compared to depressed patients and healthy controls. Both patients with MCI and patients with probable AD exhibited loss of fine motor performance. Movements of AD patients were significantly less regular than those of healthy controls.

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“…However, familiarity with a task does not always have a positive effect on performance. A study applying kinematic analysis revealed that, irrespective of age, the duration of a stroke by the right hand was shorter when it was made towards the body (adductive movement) than away from the body (abductive movement) [22] . This finding refutes the theory that familiarity generates a positive effect, as the normal direction of the right hand during writing is away from the body [22] .…”

Section: Effect Of Aging On Hand Motor Functionmentioning

confidence: 99%

Higher-Level Hand Motor Function in Aging and (Preclinical) Dementia: Its Relationship with (Instrumental) Activities of Daily Life – A Mini-Review

Scherder¹,

Dekker

Eggermont³

2008

Gerontology

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A causal relationship between physical activity such as walking and cognitive functions – particularly executive functions and memory – has been observed in elderly people with and without dementia. Executive functions play an important role in the (instrumental) activities of daily life [(I)ADL]. However, a close relationship has also been found between motor activity of the upper limb, particularly the hand, and (I)ADL. Indeed, in aging, a decline in hand motor function is related to a decrease in (I)ADL, an increase in functional dependency, admission to a nursing home, and even mortality. This review begins by addressing clinical studies on the effect of age on higher-level hand motor activity. It then discusses higher-level hand motor function in age-related neurodegenerative diseases such as mild cognitive impairment, Alzheimer’s disease and vascular dementia. It concludes by discussing the contribution of higher-level hand motor function assessment to the diagnosis of the various subtypes of (preclinical) dementia and by addressing the clinical relevance of studying higher-level hand motor function, procedural learning, and (I)ADL in aging and (preclinical) dementia.

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Effects of Hand and Age upon Abductive and Adductive Movements: A Kinematic Analysis

Cited by 30 publications

References 0 publications

Kinematic Analysis of Cursor Trajectories Controlled With a Touchpad

Kinematic Analysis of Cursor Trajectories Controlled With a Touchpad

Kinematic Analysis of Handwriting Movements in Patients with Alzheimer’s Disease, Mild Cognitive Impairment, Depression and Healthy Subjects

Higher-Level Hand Motor Function in Aging and (Preclinical) Dementia: Its Relationship with (Instrumental) Activities of Daily Life – A Mini-Review

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