n, pl  spi*na*les   :  the most medial division of the sacrospinalis situated next to the spinal column and acting to extend it or any of the three muscles making up this division:  a  :  SPINALIS THORACIS  b  :  SPINALIS CERVICIS  c  :  SPINALIS CAPITIS
  - see MEDULLA SPINALIS  .
 
   
 
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