What is the difference between oblique and rectus

Where is the inferior oblique muscle located? The inferior oblique muscle or obliquus oculi inferior is a thin, narrow muscle placed near the anterior margin of the floor of the orbit. The inferior oblique is an extraocular muscle, and is attached to the maxillary bone origin and the posterior, inferior, lateral surface of the eye insertion. What is the shortest extraocular muscle?

What does the lateral rectus do? The lateral rectus muscle is a muscle on the lateral side of the eyeball in the orbit. It is one of six extraocular muscles that control the movements of the eye. The lateral rectus muscle is responsible for lateral movement of the eyeball, specifically abduction. What does Intorsion mean? Medical Definition of intorsion : inward rotation as of a body part about an axis or a fixed point especially : rotation of the eye around its anteroposterior axis so that the upper part moves toward the nose — compare extorsion.

What does the superior rectus muscle do? The main actions provided by the superior rectus are elevation and adduction of the eyeball, and medial rotation of the eyeball. To obtain the upward movement, the muscle must function in synergy with the inferior oblique. What does the medial rectus muscle do? Specifically, the medial rectus muscle works to keep the pupil closer to the midline of the body. It helps move the eye up and down and from side to side.

It also works with the two oblique muscles, whose function is to move the eye in and out. What does the Trochlear nerve do? Location and Function The trochlear nerve is also known as the fourth cranial nerve.

Internal Oblique: This muscle lies under the external oblique. When it contracts, it rotates you to the same side as the muscle that is contracting. So that means if your internal oblique on the right contracts, it turns you to the right and if the internal oblique on the left contracts, it turns you to the left.

It also is a lateral flexor of the spine or a side bending muscle and bends you to the same side as the muscle that is contracting. As with all things in anatomy, the more you apply it in teaching, the better it sticks in your brain.

Keep re-reading and applying it and eventually the information will come more naturally. If you enjoy learning about anatomy, check out my online courses on anatomy. Anatomy Stories: How can I tell the difference between my internal and external obliques? The oblique muscles are also primarily responsible for torsional movements. Clinical Significance Instead, as mentioned above, the superior oblique is tested by having the patient look down and in.

By canceling the action of the inferior rectus muscle via contraction of the medial rectus, one can isolate the action of the superior oblique.

Eye muscle anatomy. There are six extraocular muscles that move the globe eyeball. These muscles are named the superior rectus , inferior rectus , lateral rectus , medial rectus , superior oblique, and inferior oblique. Asked by: Alexandr Thevissen asked in category: General Last Updated: 23rd June, What is the difference between rectus and oblique? The Actions and Innervation of Extraocular Muscles.

Elevation is due to the action of the superior rectus and inferior oblique muscles, while depression is due to the action of the inferior rectus and superior oblique muscles. When the eye is abducted, the rectus muscles are the prime vertical movers.

Which way does the superior oblique move the eye? The trochlear nerve supplies only the superior oblique muscle, which moves the eye downwards and medially towards the nose. Where is the inferior oblique muscle located? The inferior oblique muscle or obliquus oculi inferior is a thin, narrow muscle placed near the anterior margin of the floor of the orbit.

The inferior oblique is an extraocular muscle, and is attached to the maxillary bone origin and the posterior, inferior, lateral surface of the eye insertion. What is the shortest extraocular muscle? What does the lateral rectus do? The lateral rectus muscle is a muscle on the lateral side of the eyeball in the orbit.

It is one of six extraocular muscles that control the movements of the eye. The lateral rectus muscle is responsible for lateral movement of the eyeball, specifically abduction.