Effect of instructions on functional reach in persons with and without cerebrovascular accident.
OBJECTIVE
Verbal instructions comprise an important element of clinical practice, however, their effectiveness in promoting movement organization in persons with cerebrovascular accident (CVA) has not been well investigated.


METHODS
A counterbalanced, repeated-measures design was used to examine the effects of externally focused (task-related) versus internally focused (movement-related) instructions on movement kinematics during three functional reaching tasks. Participants included 16 persons with stroke who were able to perform the tasks with their affected arm and 17 age-matched adults without neurological impairments.


RESULTS
Significantly shorter movement time and greater peak velocity were evident when reaching under the external-focus condition of all tasks than for the internal-focus condition.


CONCLUSIONS
One clinical implication is that internally focused instructions can contribute to slower and less forceful reach in adults with and without CVA. This research reinforces the need for therapists to consider their use of instruction during the evaluation and treatment of movement disorders.
Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge 02139-4307, USA. sfasoli@mit.edu
Susan E
SE
Fasoli
Catherine A
CA
Trombly
Linda
L
Tickle-Degnen
Mieke H
MH
Verfaellie
D000328:Adult; D001696:Biomechanical Phenomena; D016022:Case-Control Studies; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009788:Occupational Therapy / Q000379:methods*; D011597:Psychomotor Performance / Q000502:physiology*; D020127:Recovery of Function / Q000502:physiology*; D020521:Stroke / Q000503:physiopathology; D000071939:Stroke Rehabilitation