DISSECTION OF THE HEAD AND NECK 255 



(ccaa) Buccinator nerve (N. buccinatorius) (0. 

 T. long buccal). 



(ccb) Auriculotemporal nerve (N. auriculotemporalis) . 



(ccba) Parotid rami (rami parotidei). 



(ccbb) Anastomotic branch of facial nerve 



(ramus anastomoticus cum N. fa- 

 cialis). 



(ccbc) Anterior auricular nerves (Nn. auricu- 



lares anteriores). 



(ccbd) Superficial temporal rami (rami tem- 



porales superficiales) . 



(ccc) Mental nerve (N. mentalis). 



(ccca) Mental rami (rami mentales). 



(cccb) Inferior labial rami (rami labiales infe- 



riores), 



Eyelids. (Figs. 106 and 107.) 



Dissect up the M. orbicularis palpebrarum in its entirety 

 and reflect it medialward, avoiding injury to the underlying 

 vessels and nerves. Study 



(a) Orbital septum (septum orbitale) (0. T. palpebral ligaments). Note 



its attachments. 



(b) Tarsi. 



(ba) Upper tarsus (tarsus superior). 



(bb) Lower tarsus (tarsus inferior). 



How do these differ? 



(c) Tarsal glands (glandulae tarsales [Meibomi]) (0. T. Meibomian 



glands). 



Compare those of the upper with those of the lower lid. Exam- 

 ine the orifices with a hand lens along the limbi palpebrales poste- 

 riores. Squeeze the lid between the thumb and finger, so as to 

 express some of the greasy secretion (sebum palpebrale). 



(d) Lateral palpebral raphe (raphe palpebralis lateralis) (0. T. external 



tarsal ligament). 



Examine its attachments to the os zygomaticum and to the tarsi. 



(e) Medial palpebral ligament (ligamentum palpebrale mediale) (0. T. 



internal tarsal ligament). 



Examine its attachments to the maxilla and to the tarsi. 



(f) Nerves and blood-vessels of the lids. 



These have been enumerated above in connection with the arteries, 

 veins, and nerves of the face. 



(g) Tendon of insertion of the M. levator palpebrae superioris. This can 



be exposed by cutting transversely through the upper part of the 

 septum orbitale close to the bone and reflecting it downward 

 towards the tarsus superior. 



Lacrimal Apparatus (Apparatus lacrimalis). 



Dissect out the upper and lower lacrimal glands (glandula 

 lacrimalis superior, inferior). Are any accessory lacrimal 



