We are independent & ad-supported. We may earn a commission for purchases made through our links.
Advertiser Disclosure
Our website is an independent, advertising-supported platform. We provide our content free of charge to our readers, and to keep it that way, we rely on revenue generated through advertisements and affiliate partnerships. This means that when you click on certain links on our site and make a purchase, we may earn a commission. Learn more.
How We Make Money
We sustain our operations through affiliate commissions and advertising. If you click on an affiliate link and make a purchase, we may receive a commission from the merchant at no additional cost to you. We also display advertisements on our website, which help generate revenue to support our work and keep our content free for readers. Our editorial team operates independently of our advertising and affiliate partnerships to ensure that our content remains unbiased and focused on providing you with the best information and recommendations based on thorough research and honest evaluations. To remain transparent, we’ve provided a list of our current affiliate partners here.

What is the Medial Rectus?

By Meshell Powell
Updated Mar 03, 2024
Our promise to you
The Health Board is dedicated to creating trustworthy, high-quality content that always prioritizes transparency, integrity, and inclusivity above all else. Our ensure that our content creation and review process includes rigorous fact-checking, evidence-based, and continual updates to ensure accuracy and reliability.

Our Promise to you

Founded in 2002, our company has been a trusted resource for readers seeking informative and engaging content. Our dedication to quality remains unwavering—and will never change. We follow a strict editorial policy, ensuring that our content is authored by highly qualified professionals and edited by subject matter experts. This guarantees that everything we publish is objective, accurate, and trustworthy.

Over the years, we've refined our approach to cover a wide range of topics, providing readers with reliable and practical advice to enhance their knowledge and skills. That's why millions of readers turn to us each year. Join us in celebrating the joy of learning, guided by standards you can trust.

Editorial Standards

At The Health Board, we are committed to creating content that you can trust. Our editorial process is designed to ensure that every piece of content we publish is accurate, reliable, and informative.

Our team of experienced writers and editors follows a strict set of guidelines to ensure the highest quality content. We conduct thorough research, fact-check all information, and rely on credible sources to back up our claims. Our content is reviewed by subject-matter experts to ensure accuracy and clarity.

We believe in transparency and maintain editorial independence from our advertisers. Our team does not receive direct compensation from advertisers, allowing us to create unbiased content that prioritizes your interests.

The medial rectus is a muscle located in the eye socket. This muscle works within a sort of pulley-system and, along with other extraocular muscles, helps to control certain movements of the eye. The role of the medial rectus in eye movement is that of adduction. That is to say, the eye moves in an inward direction, as toward the nose. Several medical conditions have the potential to compromise the function of this important muscle of the eye.

The nerve supply to the medial rectus muscle is provided by the oculomotor nerve, also referred to as the third cranial nerve. While working to control the majority of the movements of the eye itself, this nerve provides other functions as well. The oculomotor nerve is also responsible for holding the eyelid in an open position in addition to constricting the pupil.

Medial rectus palsy is a medical condition known to have an adverse effect on the medial rectus muscle. This condition occurs frequently when there has been a traumatic brain injury. The damage to the oculomotor nerve causes nerve and sometimes muscle paralysis. Improper eye movement and double vision are typical symptoms of this condition. Medications are sometimes helpful in alleviating troubling symptoms, although surgical intervention is sometimes necessary.

Esotropia is another condition affecting the medial rectus muscle. In this condition, the patient exhibits what is commonly referred to as a squint. What this means is that the eye, or sometimes both eyes, turn in an inward position. This is commonly known as being cross-eyed. A surgical procedure called medial rectus recession is often employed in an attempt to correct this condition.

Medial wall fractures sometimes occur when there has been some sort of facial trauma. This type of fracture is another common cause of damage to the medial rectus muscle. The orbital floor is normally affected along with the medial wall itself. Swelling and skin discoloration are often the only outward signs that this type of fracture has occurred. While symptoms sometimes resolve on their own, surgery is very often required.

An abnormal muscle thickness involving the medial rectus is sometimes found in a patient with Grave's Disease, although it can be present with no sign of disease. This condition causes pain as well as impaired vision. The use of medications such as eye drops along with the use of a humidifier is often enough to relieve troublesome symptoms in those with mild cases of this condition. Radiation or surgery are only necessary modes of treatment in rare cases which do not respond to more conservative treatments.

The Health Board is dedicated to providing accurate and trustworthy information. We carefully select reputable sources and employ a rigorous fact-checking process to maintain the highest standards. To learn more about our commitment to accuracy, read our editorial process.
Discussion Comments
The Health Board, in your inbox

Our latest articles, guides, and more, delivered daily.

The Health Board, in your inbox

Our latest articles, guides, and more, delivered daily.