Abi Chebel Najib M, Gaunet Florence, Chavet Pascale, Assaiante Christine, Bourdin Christophe, Sarlegna Fabrice R
Aix Marseille Univ, CNRS, ISM, Marseille, France.
Aix Marseille Univ, CNRS, LPC, Marseille, France.
Neurosci Lett. 2023 Jul 27;810:137335. doi: 10.1016/j.neulet.2023.137335. Epub 2023 Jun 13.
In humans, body segments' position and movement can be estimated from multiple senses such as vision and proprioception. It has been suggested that vision and proprioception can influence each other and that upper-limb proprioception is asymmetrical, with proprioception of the non-dominant arm being more accurate and/or precise than proprioception of the dominant arm. However, the mechanisms underlying the lateralization of proprioceptive perception are not yet understood. Here we tested the hypothesis that early visual experience influences the lateralization of arm proprioceptive perception by comparing 8 congenitally-blind and 8 matched, sighted right-handed adults. Their proprioceptive perception was assessed at the elbow and wrist joints of both arms using an ipsilateral passive matching task. Results support and extend the view that proprioceptive precision is better at the non-dominant arm for blindfolded sighted individuals. While this finding was rather systematic across sighted individuals, proprioceptive precision of congenitally-blind individuals was not lateralized as systematically, suggesting that lack of visual experience during ontogenesis influences the lateralization of arm proprioception.
在人类中，可以通过视觉和本体感觉等多种感官来估计身体各部位的位置和运动。有人提出，视觉和本体感觉可以相互影响，并且上肢本体感觉是不对称的，非优势手臂的本体感觉比优势手臂的本体感觉更准确和/或精确。然而，本体感觉感知偏侧化的潜在机制尚不清楚。在这里，我们通过比较8名先天性失明和8名匹配的视力正常的右利手成年人，检验了早期视觉经验影响手臂本体感觉感知偏侧化的假设。使用同侧被动匹配任务在双臂的肘部和腕关节处评估他们的本体感觉。结果支持并扩展了这样一种观点，即对于蒙眼的视力正常个体，非优势手臂的本体感觉精度更好。虽然这一发现对于视力正常的个体相当具有系统性，但先天性失明个体的本体感觉精度并没有如此系统性地偏侧化，这表明个体发育过程中缺乏视觉经验会影响手臂本体感觉的偏侧化。
