MYOLOGY 8 I 



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

 to the spur process. 



Shape. Thin, flat. 



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

 between the cornua of the os hyoides. 



Action. Approximates the cornua of the os hyoides. 



THE CERVICAL MUSCLES 



Complexus Rectus capitis anticus minor 



Flexor capitis inferior Rectus capitis posticus major 



Biventer cervicis Longus colli posticus 



Obliquus colli Longus colli anterior 



Rectus capitis lateralis Trachelo-mastoideus 



Interspinales 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 minor.) 



Location. Infero-lateral portion of the neck. 



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

 the third, and the fourth cervical vertebae. 



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 colli anterior. 



