GHI Raincy-Montfermeil, Montfermeil, France.
Hôpital Saint-Antoine, Paris, France.
Orthop Traumatol Surg Res. 2023 Oct;109(6):103194. doi: 10.1016/j.otsr.2021.103194. Epub 2021 Dec 22.
Radial nerve palsy is a classical complication of a humeral shaft fracture. In clinical practice, motor palsy of the radial nerve is sometimes observed without an abnormality felt in the sensory territory.
We hypothesised that this dissociation between sensory and motor involvement is related to anatomical variations of the sensory innervation of the dorsal surface of the first digit space, thus, we decided to study the nature and frequency of these variations.
A cadaveric study was conducted on 24 upper limbs to analyse the truncal origin of the sensory branches innervating the dorsal surface of the first digit space.
The sensory branch of the radial nerve (SBRN) participated in the innervation of the dorsal surface of the first digit space in 22 limbs, an anatomical variation was present in 2 cases with a mixed innervation by the SBRN and the lateral cutaneous nerve of forearm (LCNF) in 1 case and singular innervation by LCNF, with no SBRN involvement, in 1 case. Communications between SBRN and LCNF were found in 7 cases.
Pure motor radial damage, without a sensory deficit of the dorsal surface of the first digit space, does not preclude a complete traumatic injury of the radial nerve. The sensory innervation of this region can be relayed by a branch of the LCNF.
IV; cadaveric study.
桡神经麻痹是肱骨骨折的一种典型并发症。在临床实践中，有时会观察到桡神经运动麻痹，而感觉区域没有异常。
我们假设这种感觉和运动参与的分离与第一指间背侧感觉神经支配的解剖变异有关，因此，我们决定研究这些变异的性质和频率。
对 24 个上肢进行了尸体研究，以分析支配第一指间背侧的感觉分支的干起源。
桡神经感觉支（SBRN）参与了 22 个肢体的第一指间背侧的感觉支配，在 2 个病例中存在解剖变异，其中 1 个病例由 SBRN 和前臂外侧皮神经（LCNF）混合支配，1 个病例由 LCNF 单独支配，无 SBRN 参与，7 个病例中发现 SBRN 和 LCNF 之间存在交通支。
单纯桡神经运动损伤，第一指间背侧无感觉缺失，不能排除桡神经完全外伤性损伤。该区域的感觉支配可以由 LCNF 的分支来传递。
IV；尸体研究。
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