Pain and the body schema - Evidence for peripheral effects on mental representations of movement
Pain and the body schema - Evidence for peripheral effects on mental representations of movement
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DOI：
10.1093/brain/124.10.2098
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发表时间：
2001-10-01
期刊：
影响因子：
14.5
通讯作者：
Coslett, HB
中科院分区：
文献类型：
--
作者：
Schwoebel, J;Friedman, R;Coslett, HB
身体表征的一些账户假设身体在空间中的实时表征由本体感觉、躯体感觉、前庭和其他感觉输入产生;这种表征通常被称为“身体图式”。为了检验身体图式是否受到疼痛等外围因素的影响，我们要求慢性单侧手臂疼痛患者确定不同方向的手的偏侧性。先前的计时研究结果表明，在这项任务上的表现取决于身体图式，因为它似乎涉及在心理上旋转一只手从当前位置，直到它与刺激手对齐。我们发现，在以前的调查中，参与者的反应时间（RTs）反映了模拟运动的程度以及手臂的生物力学约束。重要的是，观察到心理旋转和肢体的大小之间的显着相互作用：对于大幅度的想象运动，疼痛的手臂比未受影响的手臂的RTs更长;控制显示对称的RTs。这些研究结果表明，身体图式的影响，疼痛和这项任务可能提供了一个客观的措施疼痛。
Some accounts of body representations postulate a realtime representation of the body in space generated by proprioceptive, somatosensory, vestibular and other sensory inputs; this representation has often been termed the 'body schema'. To examine whether the body schema is influenced by peripheral factors such as pain, we asked patients with chronic unilateral arm pain to determine the laterality of pictured hands presented at different orientations. Previous chronometric findings suggest that performance on this task depends on the body schema, in that it appears to involve mentally rotating one's hand from its current position until it is aligned with the stimulus hand. We found that, as in previous investigations, participants' response times (RTs) reflected the degree of simulated movement as well as biomechanical constraints of the arm. Importantly, a significant interaction between the magnitude of mental rotation and limb was observed: RTs were longer for the painful arm than for the unaffected arm for large-amplitude imagined movements; controls exhibited symmetrical RTs. These findings suggest that the body schema is influenced by pain and that this task may provide an objective measure of pain.