Question: How Did The Infraspinatus Get Its Name?
The infraspinatus muscle is a triangular-shaped muscle that is located at the back of the shoulder joint, on the back surface of the scapula, attaching to the top of the humerus. The infraspinatus gets its name because this muscle is located in the infraspinous fossa, a concave surface at the back of the scapula.
What does infraspinatus mean in medical terms?
Medical Definition of infraspinatus: a muscle that occupies the chief part of the infraspinous fossa of the scapula, is inserted into the greater tubercle of the humerus, and rotates the arm laterally.
How did the supraspinatus muscle get its name?
Location. The supraspinatus muscle is one of four muscles in a group of muscles in the shoulder region known as the rotator cuff. These keep the top of your upper arm bone secured inside the socket of the shoulder. The first part of the name, ‘ supra-‘ comes from the term ‘superior’, meaning above or on top.
What does supraspinatus and infraspinatus mean?
Muscle, infraspinatus: A muscle that assists the lifting of the arm while turning the arm outward (external rotation). The supraspinatus muscle, which is responsible for elevating the arm and moving it away from the body; and. The subscapularis muscle, which moves the arm by turning it inward (internal rotation).
Is the subscapularis the same as infraspinatus?
Compared to the other rotator cuff muscles, the infraspinatus has the second-largest anatomic footprint on the humerus. The subscapularis has the largest. The infraspinatus also acts on the scapula. Scaption makes the scapula more mobile, which assists the other shoulder muscles in allowing for full shoulder abduction.
Does infraspinatus abduct or adduct?
Infraspinatus is the main external rotator of the shoulder joint. It assists in producing shoulder extension. With the arm fixed, it abducts the inferior angle of the scapula.
What is the Infraspinous fossa of the scapula?
It is called the infraspinous fossa because it lies below (infra) the spine of the scapula (-spinous). Accordingly, the fossa that lies superior to the spine of the scapula is the supraspinous fossa. The scapula consists of two surfaces – the costal surface and the posterior surface.
What is Subscap?
The subscapularis is a muscle in your shoulder that helps you internally rotate your arm. The subscapularis connects from your shoulder blade to your humerus, or upper arm bone. All the muscles of the rotator cuff, including the subscapularis, can tear from overuse, trauma, or age-related conditions.
What is the meaning of the suffix in the term rhabdomyolysis?
rhabd/o – combining form meaning rod-shaped or striated (found in skeletal muscles) my/o – combining form meaning muscle. -lysis – suffix meaning dissolution (damage or death)
Are the rhomboids under the trapezius?
The rhomboid muscles, located on your upper back underneath the trapezius muscle, play a big part when it comes to posture. This is especially true if you have overdeveloped chest muscles or your shoulders pronate forward. The rhomboids are rhombus-shaped and are used to pull the shoulder blades together.
What is the tricep Brachii?
The triceps brachii is the muscle that runs down the back of the humerus, which is the long bone of the upper arm, and ends at the top of the ulna, which is the long bone of the forearm.
Can a full thickness tear heal itself?
Full thickness tears do not heal by themselves because the muscles pull the edges of the tear apart. However it is possible for full or partial thickness tears to stabilize leaving the shoulder with reasonable comfort and function.
What is a Intrasubstance tear?
An intrasubstance meniscus tear (also called interstitial or degenerative) is essentially a painful blister that has formed within the substance of your meniscus due to the forces placed on it from the surrounding femur and tibia.
What is a SLAP tear?
SLAP tears happen when you tear cartilage in the inner part of your shoulder joint. The tears can be caused by injury or overuse and make it painful or difficult for you to move your shoulder and arm.