Bakkum B W, Mestan M
Department of Anatomy, National College of Chiropractic, Lombard, IL 60148.
J Manipulative Physiol Ther. 1994 Oct;17(8):517-22.
This study was designed to determine the effects of the presence of transforaminal ligaments (TFL) on the superior-to-inferior dimension (SI) and anterior-to-posterior dimension (AP) of the compartment containing the ventral ramus of the spinal nerve (VR) in the intervertebral foramen (IVF).
Four lumbar spines, including T12 and in one case T11, were obtained from embalmed cadavers and carefully dissected to expose the contents of the IVF. All ligamentous structures in the vicinity of the IVF were preserved. The greatest SI and AP of each IVF were measured. When present, TFL help define a compartment at the exit zone of the IVF that contains the VR. The SI and AP of these compartments were also measured.
Of 49 IVF examined, at least one TFL was present in 35. In the 34 IVF with horizontally oriented TFL, the mean SI of the compartments for the VR was 31.5% smaller than that of the IVF (one-way ANOVA, p < .01). No significant differences were seen between the AP of the IVF and compartments for the VR in the levels with vertically oriented TFL (n = 11).
TFL were found to be present in 71% of lower thoracic and lumbar IVF. If TFL were present, the SI of the compartment containing the VR in the IVF was significantly decreased (mean = 31.5%). This finding suggests that often there may be less space at the exit zone of the IVF for the ventral ramus than traditionally thought, which could contribute to the incidence of neurological symptomatology in this region, especially after trauma or degenerative changes.
本研究旨在确定椎间孔韧带（TFL）的存在对椎间孔（IVF）内包含脊神经腹侧支（VR）的腔隙的上下径（SI）和前后径（AP）的影响。
从防腐尸体上获取四个腰椎，其中包括T12，一例为T11，并仔细解剖以暴露IVF的内容物。保留IVF附近的所有韧带结构。测量每个IVF的最大SI和AP。当存在TFL时，其有助于在IVF的出口区域界定一个包含VR的腔隙。还测量了这些腔隙的SI和AP。
在检查的49个IVF中，35个存在至少一条TFL。在34个具有水平方向TFL的IVF中，VR腔隙的平均SI比IVF的平均SI小31.5%（单因素方差分析，p < 0.01）。在具有垂直方向TFL的节段中（n = 11），IVF和VR腔隙的AP之间未观察到显著差异。
发现71%的下胸段和腰段IVF存在TFL。如果存在TFL，IVF中包含VR的腔隙的SI会显著减小（平均减小31.5%）。这一发现表明，IVF出口区域通常可能为腹侧支提供的空间比传统认为的要小，这可能导致该区域神经症状的发生率增加，尤其是在创伤或退变后。
