… While the cranial nerves that enter and exit the brain are peripheral nerves related to the functions of the head and face, the spinal nerves that enter and exit the spinal cord are nerves that mainly affect the functions of the parts of the body below the neck. The spinal cord is divided into the cervical, thoracic, lumbar, sacral, and coccygeal spinal cord according to the parts of the body that it corresponds to, while the spinal nerves that enter and exit these parts are called the cervical nerves, thoracic nerves, lumbar nerves, sacral nerves, and coccygeal nerves. In humans, there are 8 pairs of cervical nerves, 12 pairs of thoracic nerves, 5 pairs of lumbar nerves, 5 pairs of sacral nerves, and 1 pair of coccygeal nerves, for a total of 31 pairs of spinal nerves. … *Some of the terminology that mentions "lumbar nerves" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
… 脳に出入する脳神経が,頭顔部の機能にかかわる末梢神経であるのに対し,脊髄に出入する脊髄神経は,主として頸部以下の身体部位の機能にかかわる神経である。脊髄はその対応する身体部位にしたがって,頸髄,胸髄,腰髄,仙髄,尾髄に区分され,一方,それらの部位に出入する脊髄神経は頸神経cervical nerves,胸神経thoracic nerves,腰神経lumbar nerves,仙骨神経sacral nerves,尾骨神経coccygeal nervesと呼ばれる。ヒトでは,頸神経は8対,胸神経は12対,腰神経は5対,仙骨神経は5対,尾骨神経は1対で,全部で31対の脊髄神経がある。… ※「lumbar nerves」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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