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Mechanisms explaining the association between low back trouble and deficits in information processing. A controlled study with follow-up.

Abstract：

STUDY DESIGN:A controlled study with a 6-month follow-up period. OBJECTIVES:To find an explanation for the association between impairment in information processing, i.e., slow reaction times, and chronic low back trouble. SUMMARY OF BACKGROUND DATA:Low back trouble, chronic pain in general, and depression have been associated with impaired cognitive functions and slow reaction times. It is a common phenomenon that the preferred hand performs better than the nonpreferred hand in motor tasks. The authors hypothesized that chronic low back trouble hampers the functioning of short-term memory in a way that leads the preferred hand to loose its advantage over the nonpreferred hand, but that the advantage would be restored during the rehabilitation. METHODS:Sixty-one healthy control subjects and 68 patients with low back trouble participated in the study. Reaction times for the preferred and nonpreferred upper limbs were tested. A multiway analysis of covariance was used to examine the group, handedness, and rehabilitation effects on reaction times. The hypothesis was specifically tested with a third-degree interaction: group-handedness-rehabilitation. RESULTS:A significant interaction among group, handedness, and rehabilitation was found (P = 0.05). At the beginning, the reaction times for the preferred hand were faster among the control subjects (P = 0.001), but not among the patients with low back trouble (P = 0.62). After the rehabilitation, the preferred hand was faster both among the control subjects (P = 0.001) and the patients with low back trouble (P = 0.0002). During the rehabilitation, back pain, psychological distress, and general disability decreased significantly among the patients with chronic low back trouble. CONCLUSIONS:The results support the hypothesis that chronic low back trouble (i.e., pain, psychological distress, and general disability) hampers the functioning of short-term memory, which results in decreased speed of information processing among patients with chronic low back trouble.

journal_name

Spine (Phila Pa 1976)

journal_title

Spine

authors

Luoto S,Taimela S,Hurri H,Alaranta H

doi

10.1097/00007632-199902010-00011

keywords:

subject

Has Abstract

pub_date

1999-02-01 00:00:00

pages

255-61

issue

eissn

0362-2436

issn

1528-1159

journal_volume

pub_type

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Mechanisms explaining the association between low back trouble and deficits in information processing. A controlled study with follow-up.