contribution怎么理解？分支？

The SPG contains sensory, parasympathetic, and sympathetic fibers (see Fig. 29.1). Sensory fibers include the sphenopalatine branches of the maxillary nerve and receive inputs from the nasal membrane, soft palate, and pharynx [5, 11, 12]. Parasympathetic fibers arise from the nervus intermedius through contribution from the greater petrosal branch of the facial nerve and are responsible for the secretory and vasodilatory functions of the various glands of the eyes and naso- and oropharynx. The sympathetic fibers originate from preganglionic fibers of the upper thoracic spinal cord and synapse with postganglionic fibers at the superior cervical ganglion. From here, the sympathetic nerves travel through the carotid plexus and join the deep petrosal nerve which then enters the SPG to supply the vasoconstrictor functions of the ganglion.

蝶腭神经节包含感觉、副交感和交感神经纤维（见图29-1）。感觉纤维包括接受来自鼻粘膜、软腭和咽的传入信号的上颌神经的蝶腭支^[5,11,12]。副交感神经纤维来自面神经中的岩大神经的中间神经，负责眼、鼻、口咽各腺体的分泌和血管的舒张功能。交感纤维起源于上胸段脊髓的节前纤维和颈上神经节的节后纤维突触。交感神经在此穿过颈动脉丛，与岩深神经汇合后进入SPG支配神经节的血管收缩功能。

contribution怎么理解？分支？

https://www.imaios.com/cn/e-Anatomy/node_322323/node_314449

The facial nerve consists of a motor and a sensory part, the latter being frequently described under the name of the nervus intermedius (pars intermedii of Wrisberg).

The sensory root arises from the genicular ganglion, which is situated on the geniculum of the facial nerve in the facial canal, behind the hiatus of the canal. The cells of this ganglion are unipolar, and the single process divides in a T-shaped manner into central and peripheral branches. The central branches leave the trunk of the facial nerve in the internal acoustic meatus, and form the sensory root; the peripheral branches are continued into the chorda tympani and greater superficial petrosal nerves. Entering the brain at the lower border of the pons between the motor root and the acoustic nerve, the fibers of the sensory root pass into the substance of the medulla oblongata and end in the upper part of the terminal nucleus of the glossopharyngeal nerve and in the fasciculus solitarius.

这里看了一下，也没说明白中间神经是什么回事，就说感觉神经经常叫做中间神经

which修饰哪个？the sympathetic nerves还是the deep petrosal nerve？