The extraocular muscles are six. Straight inner or middle, or lateral rectus, superior rectus, inferior rectus, superior oblique and inferior oblique or more or less. Five of them have their origin in the orbital apex (rectus muscles and the superior oblique muscle), while only one, the inferior oblique muscle born on the front of the orbit.
The four straight and superior oblique tendon do for common Zinn ring. Among them is a space called muscle cone, within which enrolled the optic nerve, ophthalmic artery, veins, ciliary nerves, oculomotor nerve and sympathetic. Within the muscle cone is also the ciliary ganglion (Plate 1, Figure 4).
The right half is the shortest of the upright. The superior rectus attends all the way under the upper eyelid levator, in establishing intimate relation to their level of muscle sheaths visual impact muscle building review
The expansions of the inferior rectus muscle sheath establish a very close relationship with the inferior oblique (Lockwood ligament).
The superior oblique is the longest of the extraocular muscles. The superior oblique has two portions (Plate 1, Photo 5), the muscular portion reaching the trochlea and out of this portion reflects that flattens and spreads out, to go straight inserted below the top, in the posterior portion of the eyeball, a tendon very thin, nearly transparent measuring approximately 10 mm wide.
The inferior oblique muscle is the one originating from the front of the orbit for a short tendon born in inferointerno angle and then inserted into the back of the eyeball, through a tendon very short (1 to 2 mm) .
The superior rectus muscle sheath is intimately related to the levator aponeurosis. Both are attached at multiple sites by fine trabeculae and in some places come to merge.
The extraocular muscles are innervated by the III, IV and VI cranial nerves.
The oculomotor innervates all extraocular muscles except the superior oblique, which is innervated by the trochlear nerve and the lateral rectus is innervated by the abducens.
The four straight and superior oblique tendon do for common Zinn ring. Among them is a space called muscle cone, within which enrolled the optic nerve, ophthalmic artery, veins, ciliary nerves, oculomotor nerve and sympathetic. Within the muscle cone is also the ciliary ganglion (Plate 1, Figure 4).
The right half is the shortest of the upright. The superior rectus attends all the way under the upper eyelid levator, in establishing intimate relation to their level of muscle sheaths visual impact muscle building review
The expansions of the inferior rectus muscle sheath establish a very close relationship with the inferior oblique (Lockwood ligament).
The superior oblique is the longest of the extraocular muscles. The superior oblique has two portions (Plate 1, Photo 5), the muscular portion reaching the trochlea and out of this portion reflects that flattens and spreads out, to go straight inserted below the top, in the posterior portion of the eyeball, a tendon very thin, nearly transparent measuring approximately 10 mm wide.
The inferior oblique muscle is the one originating from the front of the orbit for a short tendon born in inferointerno angle and then inserted into the back of the eyeball, through a tendon very short (1 to 2 mm) .
The superior rectus muscle sheath is intimately related to the levator aponeurosis. Both are attached at multiple sites by fine trabeculae and in some places come to merge.
The extraocular muscles are innervated by the III, IV and VI cranial nerves.
The oculomotor innervates all extraocular muscles except the superior oblique, which is innervated by the trochlear nerve and the lateral rectus is innervated by the abducens.
No comments:
Post a Comment