V8 ANATOMY. 



Serratus Posti / cus Superior, from the ligamentum nuchae, and spines of the 

 yth cervical and 2 or 3 upper dorsal vertebrae, into the upper borders of 

 the 2d, 3d, 4th, and 5th ribs, by 4 digitations. Action, to raise ribs in in- 

 spiration. Nerves, external posterior branches of the cervical nerves. 



Serratus Posti'cus Inferior, 16 from the spines of the last 2 dorsal and first 3 

 lumbar vertebrae, into the lower borders of the 4 lower ribs, by 4 digi- 

 tations. Action, to depress these ribs in expiration. Nerves, external 

 branches of the dorsal nerves. 



Splenius Capitis I3 et Colli, u from the lower half of the ligamentum nuchae, 

 the last cervical and 6 upper dorsal spines, and the supra-spinous ligament, 

 the S.capitis into the mastoid process and a rough surface below the supe- 

 rior curved line of the occipital bone, the S. colli into the transverse processes 

 of the 3 or 4 upper cervical vertebrae. Action, to draw the head backwards 

 and the neck erect. Nerves, external posterior branches of the cervical nerves. 



Erector Spinae, 1 from the sacro-iliac groove, and by the lumbo-sacral tendon 

 from the sacral, lumbar and 3 lower dorsal spines, the iliac crest, and the 

 posterior eminences of the sacrum, divides into the sacro-lumbalis 2 and 

 longissimus dorsi 3 muscles. Action, to erect the spine and bend the trunk 

 backwards. Nerves, external posterior branches of the lumbar nerves. 



Sacro-lumbalis, 2 from the erector spinae, into the angles of the 6 lower 

 ribs. Action, as the erector spinae. Nerves, branches of the dorsal. 



Musculus Accessorius ad Sacro-lumbalem, 2 from the angles of 6 lower 

 ribs, into the angles of 6 upper ribs. Action, as the erector spinae. Nerves, 

 branches of the dorsal. 



Cervicalis Ascendens, 5 from the angles of 4 or 5 upper ribs, into the 

 transverse processes of the 4th, 5th, and 6th cervical vertebrae. Action, 

 to keep the neck erect. Nerves, branches of the cervical. 



Longissimus Dorsi, 3 from the erector spinae, into the transverse and 

 articular processes of the lumbar vertebrae, into the tips of the transverse 

 processes of all the dorsal vertebrae, and into from 7 to n ribs between 

 their tubercles and angles. Action , as the erector spinae. Nerves, branches 

 of the lumbar and dorsal nerves. 



Transversalis Colli, 6 from the transverse processes of the 3d, 4th, 5th, and 

 6th dorsal vertebrae, into the transverse processes of the 5 lower cervical. 9 

 Action, to keep the neck erect. Nerves, cervical branches. 



Trachelo-mastoid^/hwz the transverse processes of the 3d, 4th, 5th, and 6th 

 dorsal vertebrae, and the articular processes of the 3 or 4 lower cervical, 

 into the posterior margin of the mastoid process. Action, to steady the 

 head. Nerves, branches of the cervical. 



