By What is the name of the posterior ridge of the scapula?
Spina scapulae
Scapular spine (Spina scapulae) is a long ridge that runs diagonally across the upper posterior surface of the bone.
Where is the posterior scapular region?
The scapular region is on the superior posterior surface of the trunk and is defined by the muscles that attach to the scapula (shoulder blade).
Is the Scapular a posterior?
The back of the scapula (also called the dorsal or posterior surface) is arched from above downward, and is subdivided into two unequal parts by the spine of the scapula. The portion above the spine is called the supraspinous fossa, and that below it the infraspinous fossa.
What posterior muscles support the scapula?
The anterior muscles include the subclavius, pectoralis minor, and serratus anterior. The posterior muscles include the trapezius, rhomboid major, and rhomboid minor. When the rhomboids are contracted, your scapula moves medially, which can pull the shoulder and upper limb posteriorly.
Which bone feature of the scapula is posterior?
Spine
Spine – the most prominent feature of the posterior scapula. It runs transversely across the scapula, dividing the surface into two.
What are the two major nerves in the posterior scapular region?
Dorsal scapular nerve (C5) and long thoracic nerve (C5, C6, C7).
What muscle holds the scapula in place?
The scapula is only attached to the thorax by ligamentous attachments at the acromioclavicular joint and through a suction mechanism provided by the muscular attachments of the serratus anterior and subscapualaris.
What are the names of the two Fossae located on the posterior scapula?
Three ridges within this fossa allow for tendinous attachment. The dorsal surface divides into two unequal parts via the scapular spine which runs across from the posterior scapula before forming the acromion. Above the spine is the supraspinous fossa and below it is the infraspinous fossa.
What muscle does not attach to the scapula?
The muscle that does not attach to the scapula is the latissimus dorsi.
What nerve causes scapular pain?
In a third of C8 radiculopathy cases, the medial branches from the dorsal rami reached the scapula, suggesting that this nerve root conveys interscapular and scapular pain.
What does dorsal scapular nerve pain feel like?
They may complain of sharp, stabbing, burning, or knife-like medial scapular pain, lateral arm and forearm pain, neck and back dull ache, and a sense of “traction” within the shoulder. If DSN dysfunction is chronic, there may be rhomboid or levator atrophy.
What are the bone markings of the posterior scapula?
Swipe for answers. The bone markings of the posterior scapula include the superior border, medial border, lateral border, superior angle, lateral angle, inferior angle, scapular spine, acromion, supraspinous fossa, infraspinous fossa, glenoid cavity and the infraglenoid tubercle.
What is the concave surface of the scapula called?
Scapula. The convex posterior surface of the scapula is unevenly divided by a thick projecting ridge of bone, the spine of the scapula, into a small supraspinous fossa and a much larger infraspinous fossa. The concave costal surface (ventral surface) of most of the scapula forms a large subscapular fossa.
Where is the subscapular fossa located in the scapula?
Anterior Scapula Bone Anatomy. Subscapular fossa ( Fossa subscapularis) is a large, slightly depressed region in the middle of scapula’s anterior surface. The subscapularis muscle attaches to this region of the bone.
Is the scapula part of the shoulder girdle?
The scapula is a flat, triangular-shaped bone that lies adjacent to the posterior surface of ribs. Seventeen muscles attach to the scapula, and it articulates with the clavicle to form the shoulder girdle or pectoral girdle, which supports movements of the humerus.