MYOLOGY 8 I 



Origin and Insertion. — It extends from the inner side of one comu 

 to the spur process. 



Shape.— Thva., flat. 



Relations. — Posterior to the euro-hyal, which it envelops, and 

 between the comua of the os hyoides. 



Action. — ^Approximates the comua of the os hyoides. 



THE CERVICAL MUSCLES 



Complexus Rectus capitis anticus minor 



Flexor capitis inferior Rectus capitis posticus majoiV 



Biventer cervicis Longus colli posti6uS'::u- 



Obliquus colli Longus coUi anterior 



Rectus capitis lateralis Trachelo-mastoideus 



InterspinalesJ^ / Interarticulares 



Obliquo-transversales Intertransversales "^ 

 Scalenus medius"^ 



Complexus (Fig. 19, No. 5). Location. — Supero-lateral portion 

 of the neck. 



Origin. — By three tendinous slips from the antero-lateral portion 

 of the transverse process of the fourth, the fifth, and the sixth 

 cervical vertebrae. 



Insertion. — The muscular fibers pass around the neck and meet 

 their fellows in the median line in a fascia formation. The thin 

 tendinous sheet inserts into the occiput just above the occipital 

 ridge. 



Shape. — From point of origin this muscle expands into a broad 

 sheet. 



Relations. — It overlies the muscles of the occipital region. 



Action. — It extends the head. 



Rectus Capitis Anticus Minor (Fig. 19, No. 8). (Synonym. — 

 Rectus capitis ventralis nlinor.) 



Location. — Infero-lateral portion of the neck. 



Origin. — From the apices of the hyapophyses of the second, 

 the third, and the fourth cervical vertebas. 



Insertion. — To the occiput just below the complexus. 



Shape. — ^A long and rather thick fasciculus. 



Relations. — Externally with the skin. The tendinous slips of origin 

 pass between the flexor capitis inferior and longus coUi anterior. 



