Allocentric and egocentric are two types of spatial coding. Previous studies reported the dorsal attention network’s involvement in both types. To eliminate possible paradigm-specific confounds in the results, this study employed fine-grained cue-to-target paradigm to dissociate allocentric (aSC) and egocentric (eSC) spatial coding. Twenty-two participants completed a custom visuospatial task, and changes in the concentration of oxygenated hemoglobin (O₂-Hb) were recorded using functional near-infrared spectroscopy (fNIRS). The least absolute shrinkage and selection operator-regularized principal component (LASSO-RPC) algorithm was used to identify cortical sites that predicted the aSC and eSC conditions’ reaction times. Significant changes in O₂-Hb concentration in the right inferior parietal lobule (IPL) and post-central gyrus regions were common in both aSC and eSC. Results of inter-channel correlations further substantiate cortical activities in both conditions were predominantly over the right parieto-frontal areas. Together with right superior frontal gyrus areas be the reaction time neural correlates, the results suggest top-down attention and response-mapping processes are common to both spatial coding types. Changes unique to aSC were in clusters over the right intraparietal sulcus, right temporo-parietal junction, and left IPL. With the left pre-central gyrus region, be the reaction time neural correlate, aSC is likely to involve more orienting attention, updating of spatial information, and object-based response selection and inhibition than eSC. Future studies will use other visuospatial task designs for testing the robustness of the findings on spatial coding processes.

同素中心和自我中心是两种类型的空间编码。先前的研究报道了背部注意网络在这两种类型中的参与。为了消除结果中可能存在的特定于范式的混淆，本研究采用了细微的提示到目标范式来分离同心轴（aSC）和自我中心（eSC）空间编码。22名参与者完成了自定义视觉空间任务，并使用功能近红外光谱（fNIRS）记录了氧合血红蛋白（O ₂ -Hb）的浓度变化。使用最小绝对收缩和选择运算符常规化主成分（LASSO-RPC）算法来识别预测aSC和eSC条件反应时间的皮质位点。O _2的重大变化右下壁小叶（IPL）和中央后回区域的-Hb浓度在aSC和eSC中都很常见。在两种情况下，通道间相关性的结果进一步证实了皮层活动主要集中在右额叶额叶区域。与右上额回区域一起是神经反应时间，结果表明自上而下的注意和响应映射过程是两种空间编码类型共有的。aSC的独特变化是在右顶壁沟，右颞顶顶交界和左IPL上方的簇中。与左前中枢回区域相比，作为反应时间与神经相关，与eSC相比，aSC可能涉及更多的定向注意力，空间信息更新以及基于对象的响应选择和抑制。