PALPEBRAL GROUP. 173 



PALPEBRAL GROUP. 



The palpebral, or muscles of the eyelids, are four in number, 

 named as follows : 



Orbicularis palpebrarum. 



Lachryrnalis. 



Levator palpebrse superioris externus. 



Levator palpebrse superioris interims. 



ORBICULARIS PALPEBRARUM. 

 (Musculiis Ciliaris.) 

 (Pt. II. 5. FIG. 70. //.) 



A large, thin, oval sphincter, common to the upper and lower 

 eyelids, and situated around them. 



Attachments. It is covered by the skin, to which it inti- 

 mately adheres. The superior portion is the larger, and consists 

 of numerous fleshy fasciculi, with a small flat tendon which is 

 attached to the lachrymal tubercle, near the nasal angle of the 

 eye. 



Action. It closes the eyelids. 



LACHRYAIALIS. 

 (Lachrymo- Labial i.?. ) 



A very thin muscle placed below and before the orbit, con- 

 tinuous with the levator labii superioris in front, the panniculus 

 behind, and the orbicularis palpebrarum above. It becomes 

 blended with the buccinator. 



LEVATOR PALPEBRJE SUPERIORIS EXTERXUS. 



(Fronto-superciliaris. ) 



(Fie. 70. e.) 



Situated immediately above the orbit, it is subcutaneous, short, 

 thin, and narrow. 



Attachments. It arises from the external surface of the 

 frontal bone, near the supra-orbital foramen. The fibres pass 

 downwards and outwards, blending with the orbicularis at the 

 superior part of the lid, towards the inner angle of the eye. 



