Axillary nerve

Japanese: 腋窩神経 - えきかしんけい
Axillary nerve

…In humans, the cervical plexus (formed by the anterior rami of the first through fourth cervical nerves), the brachial plexus (formed mainly by the anterior rami of the fifth through first thoracic nerves), the lumbar plexus (formed mainly by the anterior rami of the twelfth thoracic nerves through the fourth lumbar nerve), the sacral plexus (formed mainly by the anterior rami of the fourth lumbar nerve through the third sacral nerve), the pudendal plexus (formed mainly by the anterior rami of the second through fourth sacral nerves), and the coccygeal plexus (formed mainly by the anterior rami of the fourth and fifth sacral nerves and the anterior rami of the coccygeal nerve). The brachial plexus is connected to the axillary, musculocutaneous, median, ulnar, and radial nerves, which control the upper limbs. The brachial plexus is located near the base of the neck, so if the neck is pulled to one side with strong force during a traffic accident, the nerve fibers that make up the brachial plexus are easily damaged at their roots.

*Some of the terminology that mentions the "axillary nerve" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…このような神経叢として,ヒトでは頸神経叢(第1頸神経から第4頸神経までの前枝によって形成される),腕神経叢(主として第5頸神経から第1胸神経までの前枝によって形成),腰神経叢(主として第12胸神経から第4腰神経までの前枝によって形成),仙骨神経叢(主として第4腰神経から第3仙骨神経までの前枝によって形成),陰部神経叢(主として第2から第4までの仙骨神経の前枝によって形成),尾骨神経叢(主として第4および第5仙骨神経と尾骨神経の前枝によって形成)がある。 以上の神経叢のうち腕神経叢brachial plexusには上肢を支配する腋窩(えきか)神経,筋皮神経,正中神経,尺骨神経,橈骨(とうこつ)神経などがつづいている。腕神経叢は頸の付け根の付近にあるから,交通事故などの際に頸が一方に強い力で引っ張られると,腕神経叢を形成している神経繊維がその根のところで損傷されやすい。…

※「腋窩神経」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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