Infraspinous Fossa – large scooped out hollow beneath the spine of the scapula
What is Infraspinous?
Medical Definition of infraspinous
: lying below a spine especially : lying below the spine of the scapula.
What is the function of the scapula infraspinous fossa?
| Origin Infraspinous fossa of scapula | Insertion Greater tubercle of humerus | Action Shoulder joint: Arm external rotation; Stabilizes humeral head in glenoid cavity | Innervation Suprascapular nerve (C5, C6) | Blood supply Suprascapular artery, circumflex scapular arteries |
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Where is the infraspinous fossa located on the scapula?
The infraspinous fossa extends over a wide area covering most of the lower two-thirds of the dorsal surface of the scapula bone , that is – most of the area below the spine of scapula.
What is the scapular fossa?
The front of the scapula (also known as the costal or ventral surface) has a broad concavity called the subscapular fossa , to which the subscapularis muscle attaches. The medial two-thirds of the fossa have 3 longitudinal oblique ridges, and another thick ridge adjoins the lateral border; they run outward and upward.
Which bone is the shortest in the forearm?
...the two bones of the forearm when viewed with the palm facing forward. All land vertebrates have this bone. In humans it is shorter than the other bone of the forearm, the ulna .
What does Subscapular fossa mean?
Medical Definition of subscapular fossa
: the concave depression of the anterior surface of the scapula .
Where is the inferior angle of the scapula?
One such landmark is the inferior angle of the scapula (IAS), which is said to correlate with the T7, T8, or T9 spinous process or spinal level , depending on the source. Gray’s Anatomy indicates that the IAS corresponds to the level of the ninth rib, which attaches to the spine at the T8–9 interspace.
What is the action of the serratus anterior?
Action. The main actions are protraction and upward rotation of the scapulothoracic joint, moving the scapula forward across the thoracic wall . It also keeps the medial boarder and inferior angle of the scapula close to the thoracic wall.
What is the main function of the scapula?
The scapula is an important bone in the function of the shoulder joint . It engages in 6 types of motion, which allow for full-functional upper extremity movement including protraction, retraction, elevation, depression, upward rotation, and downward rotation.
How many fossa are on the scapula?
In humans they are triangular and lie on the upper back between the levels of the second and eighth ribs. A scapula’s posterior surface is crossed obliquely by a prominent ridge, the spine, which divides the bone into two concave areas, the supraspinous and infraspinous fossae.
What part of the body is the scapula?
The scapula, or shoulder blade, is a large triangular-shaped bone that lies in the upper back . The bone is surrounded and supported by a complex system of muscles that work together to help you move your arm.
What are the 3 processes of the scapula?
The scapula has three angles (superior/medial, lateral, inferior), three borders (medial, lateral/axillary, and superior), and two surfaces (ventral and dorsal). The scapula has three processes: the acromion, the spine, and the coracoid process .
What is a scapular and why have one?
The scapular (from Latin scapulae, “shoulders”) is a Western Christian garment suspended from the shoulders. ... As an object of popular piety, it serves to remind the wearers of their commitment to live a Christian life .
What are the features of the scapula?
It articulates with the humerus at the glenohumeral joint, and with the clavicle at the acromioclavicular joint. In doing so, the scapula connects the upper limb to the trunk . It is a triangular, flat bone, which serves as a site for attachment for many (17!) muscles.
