Muscles surrounding the glottis

1. Muscle wrinkling eyebrow, m. Corrugator supercilii, originates from the frontal bone located above the tear bone, is directed upward along the brow and attached to the skin of the eyebrows. Here, the muscle bundles are intertwined with muscle bundles of venter frontalis m. Occipitofrontalis.

Function: reduces the skin of the eyebrows to the median line, forming vertical folds in the region of the bridge of the nose (in the interbrow gap).

Blood supply: aa. Frontalis, supraorbitalis, temporalis, superficialis.

2. The muscles of the proud, m. Procerus, in the form of oblong-flat bundles, begins on the nasal bridge from the nasal bone or from the aponeurosis of the nasal muscle and is attached to the skin of the nadriposense.

Function: with the contraction of the muscle on both sides of the root of the nose, transverse folds are formed.

Blood supply: a. Angularis, a. Supraorbitalis.

3. Muscle, lowering eyebrow , m. Depressor supercilii, begins with a narrower part of the upper third of the lateral part of the nasal bone, outward from the previous muscle, and, gradually expanding, is directed upward; Is attached to the skin of the medial region of the eyebrows.

Function: lowers the eyebrow down and somewhat inside.

Blood supply: aa. Angularis, supraorbitalis.

4. Eye muscle , m. Orbicularis oculi, is located under the skin that covers the anterior sections of the orbit. In the muscle, three parts are distinguished: ocular, eyelid and lacrimal. All three parts of the muscle originate in the medial angle of the eye.

The glaucous part, pars orbitalis, begins with lig. Palpebrale mediale, frontal process of the upper jaw, nose of the frontal bone and follows along the upper and lower edges of the orbit, forming a muscular ring.

Internal muscle bundles in the lig. Palpebrale laterale form the lateral suture of the eyelids, raphe palpebralis lateralis.

The secular part, pars palpebralis, is a continuation of the ophthalmic part and is located directly under the skin of the eyelids. In its turn, two parts are distinguished: upper and lower, partes palpebrales superior et inferior. They begin respectively from the top and bottom edges of the lig. Palpebrale mediale and are directed to the lateral corner of the eye, where they attach to the lig. Palpebrale laterale.

The lacrimal part, pars lacrimalis, begins from the posterior crest of the lacrimal bone and is divided into two parts that cover the front and back of the lacrimal saccus saccus lacrimalis, and are lost among the muscle beams of the secular part. Outside, the lacrimal part of the muscle is not visible.

Function: pars orbitalis narrows the eye gap and smoothes the transverse folds in the area of ​​the forehead skin; Pars palpebralis closes the eye gap; Pars lacrimalis dilates the lacrimal sac.

Blood supply: aa. Facialis, temporalis superficialis, infraorbitalis, supraorbitalis.