DISSECTION OF THE HEAD AND NECK 



379 



() Posterior elastic layer (lamina elastica posterior [Demoursi, Desce- 



meti]) (0. T. Descemet's membrane). 

 (,;') Endothelium of anterior chamber (endothelium camerae anterioris). 



Vascular Coat of Eye (Tunica vasculosa oculi). 



In the CHORIOID COAT (chorioidea) study the following: 



(a) Suprachorioid layer (lamina suprachorioidea) . 



(b) Perichorioideal space (spatium perichorioideale) . 



(c) Vascular layer (lamina vasculosa). 



Observe the Vv. vorticosae. If the pigment be washed out with 

 a camel's-hair brush, these will become very evident. 



(d) Choriocapillary layer (lamina choriocapillaris) (0. T. tunica Ruysch- 



iana) . 



Between (c) and (d) observe the Aa. ciliares posteriores breves. 



In the CILIARY BODY (corpus ciliare) the ciliary wreath (corona 

 ciliaris) and the ciliary disk (orbiculus ciliaris) are to be studied. 

 To expose the ciliary wreath make a coronal section through an 

 eyeball a little in front of the equator, and remove cautiously the 

 vitreous humor from the anterior segment of the eyeball. Ex- 

 amine 



FIG. 182. 



- Orbiculus ciliaris 



Plicae ciliares 



.Corpus ciliare 



Processus ciliares 

 Iris (facies posterior) 



__Aequator lentis (lens capsule 

 separated off a little) 



Lens crystallina ( facies posterior) 



A part of the ciliary processes and ciliary folds , enlarged. (After Toldt, Anat. Atlas, Wien, 1903. 



3 Aufl., p. 895, Fig. 1342.) 



(a) Ciliary processes (processus ciliares). 



(b) Ciliary folds (plicae ciliares). 



With a camePs-hair brush wash out the pigment and note the 

 exact disposition of the processes and folds. 



The ciliary wreath may be exposed from in front in another 

 eyeball as follows : remove cornea with scissors at sclerocorneal 

 junction. Make four meridional cuts through sclera and reflect 



