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Changes in the Appendicular Skeleton with Age01:09

Changes in the Appendicular Skeleton with Age

The upper and lower limb initially develops as a small bulge called a limb bud, which appears on the lateral side of the early embryo. The upper limb bud appears near the end of the fourth week of development, with the lower limb bud appearing shortly after.
Initially, the limb buds consist of a core of mesenchyme covered by a layer of ectoderm. The ectoderm at the end of the limb bud thickens to form a narrow crest called the apical ectodermal ridge. This ridge stimulates the underlying...

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Related Experiment Video

Updated: Jun 13, 2026

Sit-to-stand-and-walk from 120% Knee Height: A Novel Approach to Assess Dynamic Postural Control Independent of Lead-limb
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Age-related changes in arm-hand postural knowledge.

María J Mozaz1, Gregory P Crucian, Kenneth M Heilman

  • 1Department of Procesos Básicos-Psicobiología University of the Basque Country, UPV/EHU, Gipuzkoa, Spain. mj.mozaz@ehu.es

Cognitive Neuropsychology
|April 20, 2010
PubMed
Summary
This summary is machine-generated.

Older adults show declines in recognizing both transitive and intransitive forelimb postures. This age-related decline impacts both types of movements, suggesting broader cognitive changes in aging.

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Area of Science:

  • Neuroscience
  • Gerontology
  • Cognitive Psychology

Background:

  • Healthy aging is associated with cognitive changes.
  • Previous research has not investigated older adults' understanding of forelimb postures and movements.
  • Cognitive function in older adults is often assessed using tools like the Mini-Mental Status Examination (MMSE) and Boston Naming Test (BNT).

Purpose of the Study:

  • To investigate the knowledge of transitive and intransitive forelimb postures and movements in healthy older adults.
  • To compare posture recognition abilities between different age groups of older adults.
  • To determine if age-related decline affects recognition of transitive versus intransitive postures differently.

Main Methods:

  • 18 healthy elderly participants were divided into two age groups: old (66-76 years) and older (77-88 years).
  • All participants completed the Mini-Mental Status Examination (MMSE) and Boston Naming Test (BNT) to ensure normal cognitive performance.
  • Participants performed a transitive and intransitive gesture postural discrimination test.

Main Results:

  • No significant differences were found between the groups in education, MMSE, or BNT performance.
  • The older group (77-88 years) performed significantly worse than the younger group (66-76 years) on both transitive and intransitive posture recognition.
  • More errors were made in recognizing transitive postures compared to intransitive postures, although recognition of both declined with age at a similar rate.

Conclusions:

  • Ageing is associated with a decline in the brain systems responsible for recognizing both transitive and intransitive postures.
  • The findings suggest a generalized impact of aging on the neural mechanisms underlying posture recognition.
  • Further research is needed to understand the specific neural underpinnings of these age-related cognitive changes.