Where does medial canthal tendon attach?
The medial palpebral ligament (medial canthal tendon) is a ligament of the face. It attaches to the frontal process of the maxilla, the lacrimal groove, and the tarsus of each eyelid. It has a superficial (anterior) and a deep (posterior) layer, with many surrounding attachments.
Where does the medial canthus insert?
The posterior limb of the MCT passes behind the lacrimal sac, inserting on the posterior lacrimal crest of the lacrimal bone.
What is medial canthal ligament?
Results (Fig. I). –The medial canthal ligament is a band of fibrous tissue which acts as a tendon of insertion for the orbicularis oculi muscle. It is situated between the medial borders of the eyelids and the bones of the medial orbital wall, viz. the lacrimal bone and the frontal process of maxilla.
What is the medial canthus of eye?
The medial canthus is the corner of the eye where the upper and lower lids meet. It is structurally very complicated as it is the connection point of the upper and lower lid and the nasal bridge. When the medial canthal is injured or disturbed there are few options to correct and they can be complicated.
What is the insertion of the orbicularis oculi?
Orbicularis oculi
| Origin | Nasal part of frontal bone, frontal process of maxilla, medial palpebral ligament, lacrimal bone |
|---|---|
| Insertion | Skin of orbital region, lateral palpebral raphe, superior and inferior tarsal plates |
What is lateral canthal tendon?
The lateral canthal tendon is attached to the inner aspect of the frontozygomatic process on the orbital osseous tubercle and is essential to the structural fixation of the lateral canthus as well as a check on the mobility of the lateral canthal angle of the eye itself.
Where is the canthus?
The canthus (pl. canthi, palpebral commissures) is either corner of the eye where the upper and lower eyelids meet. More specifically, the inner and outer canthi are, respectively, the medial and lateral ends/angles of the palpebral fissure.
What is the medial part of the eye?
The medial rectus is an extraocular muscle that attaches to the side of the eye near the nose. It moves the eye inward toward the nose. The lateral rectus is an extraocular muscle that attaches to the side of the eye near the temple. It moves the eye outward.
What is the origin insertion and action of the orbicularis oculi?
Orbicularis oculi
| Origin | Nasal part of frontal bone, frontal process of maxilla, medial palpebral ligament, lacrimal bone |
|---|---|
| Actions | Orbital part: Closes eyelids tightly Palpebral part: Closes eyelids gently Deep palpebral part: Compresses lacrimal sac |
| Innervation | Temporal and zygomatic branches of facial nerve (CN VII) |
What is the origin and insertion of the orbicularis oris?
This muscle originates from the mid-line of the mandible, which is the bone of the lower jaw, and the maxilla, which is the bone of the upper jaw. From the mandible and maxilla, the orbicularis oris muscle then travels forwards and inserts right into the tissues of the upper and lower lips.
Where does the lateral canthus attach?
Whitnall’s tubercle
Conclusions: The lateral canthal tendon attaches the upper and lower tarsal plates to Whitnall’s tubercle inside the orbital rim deep to the septum.