Localization of the centers of intramuscular nerve dense regions of the adult teres major muscle and its significance in blocking spasticity

doi:10.13418/j.issn.1001-165x.2021.04.005

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Chinese Journal of Clinical Anatomy ›› 2021, Vol. 39 ›› Issue (4) : 392-395. DOI: 10.13418/j.issn.1001-165x.2021.04.005

Localization of the centers of intramuscular nerve dense regions of the adult teres major muscle and its significance in blocking spasticity

Luo Huaixiang, Ji Songling, Yang Shengbo

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Abstract

Objective　To localize the centers of intramuscular nerve dense region (CINDR) of teres major muscle accurately. 　Methods　Twenty-four adult cadavers were collected. The curved lines close to skin surface connecting the superior angle of scapula and the acromion, and the inferior angle of scapula were designed as the horizontal (H) and longitudinal (L) reference lines, respectively. A modified Sihler's staining was used to show the intramuscular nerve dense region of one side teres major muscle. The corresponding position of the intramuscular nerve dense region of the other side muscle was anatomically exposed. And the CINDR was labeled with barium sulfate, and its body surface projection points（P and P'） of CINDR on the back and chest were determined by spiral computed tomography. The position of intersections（PH and PL） of point P vertical with H and L lines, and the depth of CINDR were determined by the Syngo system. 　Results　There was only one intramuscular nerve dense region in teres major muscle. The PH of CINDR was located at (86.71±0.85) % of line H and the PL was at (72.07±1.08) % of line L. The depth of CINDR was at (40.06±2.44) % of line P-P'. 　Conclusions　These results should be used as a guidance for intramuscular injection of botulinum toxin A to block the spasticity of teres major muscle.

Key words

/ Teres major muscle；　Spasticity；　 Intramuscular nerve dense region；　 Localization

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Luo Huaixiang, Ji Songling, Yang Shengbo. Localization of the centers of intramuscular nerve dense regions of the adult teres major muscle and its significance in blocking spasticity[J]. Chinese Journal of Clinical Anatomy. 2021, 39(4): 392-395 https://doi.org/10.13418/j.issn.1001-165x.2021.04.005

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