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胫后肌是足部的主要内翻和跖屈肌,该肌被趾长屈肌和(足母)长屈肌所覆盖,其内侧部分起自骨间膜后面,外侧部分起自腓骨后面上2/3。肌腱主要止于舟骨粗隆。胫后肌前面上2/3主要由胫前肌和趾长伸肌所覆盖。有二个神经血管束与本肌伴行。胫后肌受 L_s 和 S_1 脊神经根通过胫神经所支配,因此是电诊断评定腰骶脊神经病损、胫神经和坐骨神经病损及骶丛病损最有价值的肌肉之一。胫后肌有助于鉴别腓神经病损和 L_s 脊神经病损,然而也是屈肌群中位置最深的。从胫后途径进针最常采用胫骨内缘的解剖标志,沿胫骨后内缘通过趾长屈肌向前外侧进针插入胫后肌。另一个胫后途径是在小腿中下1/3
The posterior tibialis is the major varus and plantar flexor of the foot that is covered by flexor hallucis longus and flexor hallucis longus, with the medial portion behind the posterior interosseous membrane and the lateral portion from the fibula behind 2/3. Tendon is mainly limited to the scaphoid. The posterior tibialis anterior 2/3 is mainly covered by the anterior tibialis and extensor digitorum longus. There are two neurovascular bundles with the muscle. The posterior tibialis muscle is dominated by the tibial nerve root by the L_s and S_1 spinal nerve roots and is therefore one of the most valuable muscles for the electrical diagnosis of lumbosacral spinal nerve lesions, tibial and sciatic nerve lesions and sacral plexus lesions. Posterior tibialis helps identify peroneal nerve lesions and L_s spinal nerve lesions, but is also the deepest in flexor muscles. From the posterior tibial approach, the most commonly used anatomical landmark of the medial tibial rim is the insertion of the posterior tibialis anterior to the anterolateral side of the tibia along the medial edge of the tibia. The other posterior tibial approach is one-third of the lower leg