Hutner N, Liederman J
Boston University, MA.
Brain Lang. 1991 Nov;41(4):475-95. doi: 10.1016/0093-934x(91)90169-2.
This study examined whether the right hemisphere's contribution to lexical semantic processing is greatest when it is "disinhibited." Skilled reading may require the controlled modulation of interhemispheric interaction: the left hemisphere (or some other control mechanism) may regulate the subprocesses of reading by selectively "inhibiting" and "disinhibiting" right hemisphere function. Right-handed undergraduates concurrently performed two tasks: a lateralized semantic or rhyme task and a verbal memory task. It was hypothesized that right hemisphere reading processes would be disinhibited when the left hemisphere was "occupied" with the memory task. This hypothesis was supported for a subgroup of subjects who showed evidence of inhibition of right hemisphere function (i.e., left hemisphere dominance for lexical processing) when the lateralized semantic task was performed alone. Across subjects, there was a strong correlation between the degree of left hemisphere dominance in the single-task semantic conditions and the degree of disinhibition of right hemisphere function in the dual-task semantic condition.
本研究考察了右半球在“去抑制”状态下对词汇语义加工的贡献是否最大。熟练阅读可能需要对半球间相互作用进行可控调节：左半球（或其他某种控制机制）可能通过选择性地“抑制”和“去抑制”右半球功能来调节阅读的子过程。右利手的本科生同时执行两项任务：一项偏侧化语义或押韵任务以及一项言语记忆任务。研究假设，当左半球被记忆任务“占用”时，右半球的阅读过程将被去抑制。对于一组在单独执行偏侧化语义任务时显示出右半球功能受抑制证据（即左半球在词汇加工方面占主导）的受试者，这一假设得到了支持。在所有受试者中，单任务语义条件下左半球占主导的程度与双任务语义条件下右半球功能去抑制的程度之间存在很强的相关性。
