Spine Of Scapula

At its upper and outer angle the scapula bears a shallow hollow with which the rounded head of the upper arm bone the humerus articulates. The spine and fossae give attachment to muscles that act in rotating the arm.

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It is a triangular flat bone which attachment for 17 muscles.

Spine of scapula

. A flat triangular bone with a prominent near-horizontal raised spine lying over the upper ribs of the back. The acromialglenoid complex comprises the S2 region and the bladespine portion comprises the S1. The shoulder blade is a flat bone with three anglesthe upper superior bottom inferior and lateral glenoid angle and three bordersthe superior lateral axillary and medial vertebral border Picture 3.

By doing this it reserves the upper 15 for the supraspinous fossa and the lower 45 for the infraspinous fossa. This artery is the origin of two main branches the circumflex scapular and the thoracodorsal artery. Thomason demonstrates in this video how a small portion of the scapula can often be confused by clinicians to be the first rib especially with patients.

Few radiology articles report the types and appearances of these tumors. The right scapula from the front and back side. Medical Dictionary for the Health Professions and Nursing Farlex 2012.

The scapula is also known as the shoulder blade. A scapulas posterior surface is crossed obliquely by a prominent ridge the spine which divides the bone into two concave areas the supraspinous and infraspinous fossae. The scapula and arm are connected to the body by multiple muscle and ligament attachments.

The spine of scapula is a prominent plate of bone which crosses obliquely the medial four-fifths of the dorsal surface of the scapula at its upper part and separates the supra- from the infraspinatous fossa. It articulates with the humerus at the glenohumeral joint and the clavicle at the acromioclavicular joint. The Musculoskeletal Tumor Society has developed a classification system for shoulder girdle tumors that divides the scapula into two zones.

The head of the humerus upper arm bone is the ball and the scapula shoulder blade forms the socket where the humerus sits. The spine of the scapula or scapular spine is a prominent plate of bone which crosses obliquely the medial four-fifths of the scapula at its upper part and separates the supra- from the infraspinatous fossa. About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy Safety How YouTube works Test new features Press Copyright Contact us Creators.

On the back side of the shoulder blade at about two-thirds of its height a bony ridge called the. The spine of the scapula is a thick prominent plate of bone that crosses obliquely the medial 45 of the posterior surface of the scapula. The superior supraspinous fossa and the much bigger inferior infraspinous fossa.

The Circumflex scapular divides into the following branches of relevance. Muscles of the Scapula. The Acromion Process has 2 borders medial and lateral.

Transverse cutaneous which supplies the scapular flap. Spine or Spinuous Process is a triangular plate of bone with 3 borders and 2 surfaces. The main trunk of the scapular vascular system is the subscapular artery.

Spine of scapula - animation02gif 450 450. Spine of scapula spn skapy-l TA The prominent triangular ridge on the dorsal aspect of the scapula providing attachment for the trapezius and deltoid muscles and separating the supraspinous and infraspinous fossae. It divides the dorsal surface of the scapula into supraspinous and infraspinous fossae.

At the back of the scapula is the convex and uneven posterior surface which has a protruding ridge of bone spine of the scapula that unevenly separates it into two divisions. The posterior border is called the crest of the spine which has upper and lower lips. The front of the scapula acromion is also connected to the clavicle collarbone through the acromioclavicular joint.

2 surfaces and a facet for clavicle. The scapula is a small bone in which many neoplasms can develop.

Scapula Anatomy Location Parts Joints Muscles Anatomy Bones Scapula Upper Limb Anatomy