284 LABORATORY MANUAL OF HUMAN ANATOMY 



skull in moist carbolized cloths and oil-cloth and lay aside for 

 subsequent dissection. 



In the posterior part of the dissection work out the following : 



Muscles. 



(a) Lateral straight muscle of head (M. rectus capitis lateralis). 



This has been studied before in the deep dissection of the neck. 



(b) Anterior straight muscle of head (M. rectus capitis anterior) (O. 



T. rectus capitis anticus minor). 



(c) Long muscle of head (M. longus capitis) (0. T. rectus capitis an- 



ticus major). 



(d) Long muscle of neck (M. longus colli). 



Determine the form, position, origin, insertion, action, and innerva- 

 tion of each of the above muscles. Review the attachments of the Mm. 

 scaleni. Then cut away entirely the prevertebral and scalene muscles 

 and study from in front 



(e) Intertransverse muscles (Mm. intertransversarii) . 



(ea) Anterior (Mm. intertransversarii anteriores). 



(eb) Posterior (Mm. intertransversarii posteriores) . 



Nerves. 



Eight cervical nerves (Nn. cervicales I.~VIII.). 



(a) First cervical nerve (N. cervicalis I.). 



(aa) Anterior ramus (ramus anterior) (0. T. anterior primary 



division). 



(ab) Posterior ramus (ramus posterior, or N. suboccipitalis) 



(0. T. posterior primary division). 



(b) Second cervical nerve (N. cervicalis II.). 



(ba) Anterior ramus (ramus anterior) (0. T. anterior primary 



division ) . 



(bb) Posterior ramus (ramus posterior) (O. T. posterior pri- 



mary division). 



(bba) Medial ramus (ramus medialis, or N. occipitalis 



major). 



(bbb) Lateral ramus (ramus lateralis). 



(c) Third to eighth cervical nerves (Nn. cervicales III -VIII.). 



(ca) Anterior rami (rami anteriores) (0. T. anterior primary 



divisions). 



(cb) Posterior rami (rami posteriores) (0. T. posterior pri- 



mary divisions). 

 Blood-vessels. 



Remove the intertransverse muscles (Mm. intertransversarii), M. 

 rectus capitis lateralis, M. obliquus capitis superior, and M. obliquus 

 capitis inferior. With bone-forceps cut away the anterior tubercles 

 and costal processes of the transverse processes of the third, fourth, 

 fifth, and sixth cervical vertebrae. Study 



(a) Vertebral artery (A. vertebralis) . 



(aa) Spinal rami (rami spinales). 



Find the plexus vertebralis of the sympathetic around 

 the artery. 



(b) Vertebral vein (V. vertebralis). 



