Parasympathetic fibers concerned with relaxation emerge only from the neck (cervical) and sacral (pelvic) areas of the spinal cord.

和放松相关的副交感神经系统纤维只存在于骨髓的颈部及荐骨(骨盆)区域。

youdao

Parasympathetic fibers concerned with relaxation emerge only from the neck (cervical) and sacral (pelvic) areas of the spinal cord.

和放松相关的副交感神经系统纤维只存在于骨髓的颈部及荐骨(骨盆)区域。

youdao