Tubbs R Shane, Mortazavi Martin M, Farrington Woodrow J, Chern Joshua J, Shoja Mohammadali M, Loukas Marios, Cohen-Gadol Aaron A
Department of Pediatric Neurosurgery, Children's Hospital, Birmingham, Alabama, USA.
J Neurol Surg A Cent Eur Neurosurg. 2013 Sep;74(5):290-3. doi: 10.1055/s-0033-1343986. Epub 2013 May 21.
Little information can be found in the literature regarding the relationships of the posterior interosseous nerve (PIN) while it traverses the supinator muscle. Because compression syndromes may involve this nerve at this site and researchers have investigated using branches of the PIN to the supinator for neurotization procedures, the authors' aim was to elucidate information about this anatomy.
Dissection was performed on 52 cadaveric limbs to investigate branching patterns of the PIN within the supinator muscle.
On 29 sides, the PIN entered the supinator muscle as a single nerve and from its medial side provided two to four branches to the muscle. On 23 sides, the nerve entered the supinator muscle as two approximately equal-size branches that arose from the radial nerve on average 2.2 cm from the proximal edge of this muscle. In these cases, the medial of the two branches terminated on the supinator muscle, and the lateral branch traveled through the supinator muscle; in 13 specimens, it provided additional smaller branches to the supinator muscle. The length of PIN within the supinator muscle was 4 cm on average, and the diameter of its branches to the supinator muscle ranged from 0.8 to 1.1 mm. In 10 specimens, the PIN left the supinator muscle before the most distal aspect of the muscle. In two specimens with a single broad PIN, muscle fibers of the supinator muscle pierced the PIN as it traveled through it.
This knowledge of the anatomy of the PIN as it passes through the supinator muscle may be useful to neurosurgeons during decompressive procedures or neurotization.
关于骨间后神经（PIN）在穿过旋后肌时的关系，文献中几乎没有相关信息。由于压迫综合征可能在此部位累及该神经，且研究人员已利用PIN至旋后肌的分支进行神经移植手术，因此作者的目的是阐明有关这一解剖结构的信息。
对52具尸体的上肢进行解剖，以研究PIN在旋后肌内的分支模式。
在29侧，PIN以单支神经进入旋后肌，并从其内侧向该肌发出2至4支分支。在23侧，神经以两支大小近似的分支进入旋后肌，这两支分支平均从桡神经发出，距该肌近端边缘2.2厘米。在这些病例中，两支分支中的内侧支在旋后肌上终止，外侧支穿过旋后肌；在13个标本中，它向旋后肌发出额外的较小分支。PIN在旋后肌内的长度平均为4厘米，其至旋后肌分支的直径范围为0.8至1.1毫米。在10个标本中，PIN在旋后肌最远端之前离开该肌。在两个具有单一粗大PIN的标本中，旋后肌的肌纤维在PIN穿过时穿透了它。
了解PIN穿过旋后肌的解剖结构，可能对神经外科医生进行减压手术或神经移植手术有用。
