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There are seven extraocular muscles – the levator palpebrae superioris, superior rectus, inferior rectus, medial rectus, lateral rectus, inferior oblique and superior oblique. Functionally, they can be divided into two groups: Responsible for eye movement – Recti and oblique muscles.
The extraocular muscles, or extrinsic ocular muscles, are the seven extrinsic muscles of the eye in humans and other animals. [1] Six of the extraocular muscles, the four recti muscles, and the superior and inferior oblique muscles, control movement of the eye. The other muscle, the levator palpebrae superioris, controls eyelid elevation.
Extraocular muscles are the most specialized skeletal muscles in the human body. These are broadly divided into voluntary and involuntary muscles. The voluntary muscles include seven extraocular muscles that control the movements of the eye and eyelids, and are important for binocular single vision.
The 4 extraocular muscles that control eye movement in the cardinal directions (along with their functions) are the superior rectus, inferior rectus, lateral rectus and medial rectus muscles.
There are 7 extraocular muscles. There are 4 rectus muscles, 2 oblique muscles, and the standalone levator palpebrae superioris. The 4 rectus muscles are the medial rectus, lateral rectus, superior rectus, and inferior rectus.
Extraocular Muscle Origins. Orbit, right eye, demonstrating the extraocular muscle insertions. The four rectus muscles originate from the tendinous ring called the Annulus of Zinn, which lies just anterior to the superior orbital fissure which is straddled by the greater and lesser wings of the sphenoid bone.
In this article we discuss in detail about the anatomy of the extraocular muscles in the eye. and the angle of the eye. We will begin with classifying the various eye muscles and then delve deep into the anatomy of individual muscles and their supporting structures like muscle pulleys and fascias.
Extrinsic eye muscles (also called extraocular muscles) are attached to the outside of the eyeball and enable the eyes to move in all directions of sight. There are six extraocular eye muscles and one muscle that controls movement in the upper eyelid.
Muscles directly associated with the eye include the extraocular muscles which control the external movement of the eye; the intraocular muscles, which are responsible for pupil accommodation and reaction to light; and the protractor and retractors of the eyelids.
visual pigment. Six muscles outside the eye govern its movements. These muscles are the four rectus muscles —the inferior, medial, lateral, and superior recti—and the superior and inferior oblique muscles.