limb-kinetic apraxia
Loss of fine motor skill and dexterity in learned movements despite preserved gross motor function.
Full Definition
Limb-kinetic apraxia represents a disorder of fine motor control characterized by the loss of skilled, precise movements that were previously well-learned, despite preservation of gross motor strength and basic movement patterns. This condition affects the fluidity and accuracy of complex motor sequences, resulting in clumsy, effortful movements that lack the smooth coordination typical of practiced skills. Limb-kinetic apraxia typically results from lesions affecting the premotor cortex or supplementary motor areas, and is often seen in the context of corticobasal degeneration or other neurodegenerative conditions. Unlike other forms of apraxia, the deficit is typically unilateral and most apparent in tasks requiring fine finger movements or tool use. Assessment focuses on observing the quality and coordination of skilled movements rather than conceptual understanding of tool use.
Usage
Usage note: Emphasize the preservation of strength and gross movements when documenting this selective deficit.
In Context
- "The patient exhibited limb-kinetic apraxia in her right hand, with markedly clumsy finger movements during fine motor tasks." — Movement disorder evaluation
- "Limb-kinetic apraxia was distinguished from weakness by preserved gross motor strength with selectively impaired dexterity." — Neuropsychological assessment