Tredici G, Barajon I, Pizzini G, Sanguineti I
Istituto di Anatomia Umana Normale, Università degli Studi di Milano, Italia.
Acta Anat (Basel). 1990;137(4):320-3. doi: 10.1159/000146902.
Patients with lesions located in the frontal and temporal lobes, in the parieto-temporo-occipital border zone, and in the anterior limb of the internal capsule, did not present ataxia or other cerebellar signs. On the other hand, patients with the ataxic hemiparesis (AH) syndrome had lesions located in the posterior limb of the internal capsule, in the corona radiata and in the central region of the cerebral cortex. These findings in man do not confirm the existence of large frontal (Arnold's bundle) and temporal (Türck's bundle) projections to the pontine nuclei and indicate that the main bulk of corticopontine fibres originates from the central region of the cerebral hemisphere and courses in the posterior limb of the internal capsule. In man, the anatomical organization of corticopontine fibres is therefore similar to that recently demonstrated in animals.
额叶和颞叶、顶颞枕交界区以及内囊前肢有病变的患者未出现共济失调或其他小脑体征。另一方面，患有共济失调性偏瘫（AH）综合征的患者，其病变位于内囊后肢、放射冠和大脑皮质中央区。人体的这些研究结果并未证实存在投射至脑桥核的粗大额叶（阿诺德束）和颞叶（图尔克束）纤维束，这表明皮质脑桥纤维的主要部分起源于大脑半球中央区，并走行于内囊后肢。因此，在人体中，皮质脑桥纤维的解剖结构与最近在动物身上所证实的结构相似。
