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.
Where is the scapular spine located?
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.
What is the acromion process of the scapula?
The acromion of the scapula is a large bony projection on the superior end of the scapula. It is an important landmark of the skeletal system and a muscle attachment point essential to the function of the shoulder joint. The acromion also forms the acromioclavicular (AC) joint with the clavicle.
Which bone feature of the scapula is posterior?
BordersSuperior, lateral and medialProcessesCoracoid, acromionIs the scapula axial or appendicular?
The appendicular skeleton is everything else. It’s everything that attaches on to the axial skeleton. Think “appendages”. The pelvis, femur, fibula, tibia and all of the foot bones as well as the scapula, clavicle, humerus, radius, ulna and all of the hand bones are classified as appendicular.
What is the definition of a scapular?
Definition of scapula : either of a pair of large triangular bones lying one in each dorsal lateral part of the thorax, being the principal bone of the corresponding half of the shoulder girdle, and articulating with the corresponding clavicle or coracoid. — called also shoulder blade.
What is under the scapula?
The rhomboid muscle is located in the upper back. It helps connect the shoulder blades to the rib cage and spine. It also helps you maintain good posture. Rhomboid pain is felt under the neck between the shoulder blades and spine.
Is the scapula a sesamoid bone?
The scapula is a sesamoid bone. phenomenon it was designed to replicate. … of the scapula press against the ribs and is held there by the upper part of the m.Is scapular spine anterior or posterior?
Spine – the most prominent feature of the posterior scapula. It runs transversely across the scapula, dividing the surface into two. Acromion – projection of the spine that arches over the glenohumeral joint and articulates with the clavicle at the acromioclavicular joint.
What vertebral level is the spine 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.
Article first time published onWhich bone is the scapula?
scapula, also called shoulder blade, either of two large bones of the shoulder girdle in vertebrates. In humans they are triangular and lie on the upper back between the levels of the second and eighth ribs.
How is the scapula attached to the posterior wall of the thorax?
The ventral surface of the scapula abuts the thoracic rib cage and has a large concavity called the subscapular fossa where the subscapularis attaches. … The dorsal surface divides into two unequal parts via the scapular spine which runs across from the posterior scapula before forming the acromion.
What bone classification is the scapula?
Bone classificationFeaturesExamplesShortCube-like shape, approximately equal in length, width, and thicknessCarpals, tarsalsFlatThin and curvedSternum, ribs, scapulae, cranial bonesIrregularComplex shapeVertebrae, facial bonesSesamoidSmall and round; embedded in tendonsPatellae
Is the acromion anterior or posterior?
On the anterior side, facing into the body, is a right-angled process called the coracoid process. While at the superior lateral edge of the scapula the glenoid cavity, which serves as the socket for the head of the humerus bone. The glenoid cavity always points laterally, while the spine and acromion are posterior.
Is the scapula an acromion?
In human anatomy, the acromion (from Greek: akros, “highest”, ōmos, “shoulder”, plural: acromia) is a bony process on the scapula (shoulder blade). Together with the coracoid process it extends laterally over the shoulder joint. The acromion is a continuation of the scapular spine, and hooks over anteriorly.
Is the acromion part of the scapula?
The shoulder is made up of two joints, the acromioclavicular joint and the glenohumeral joint. The acromioclavicular joint is where the acromion, part of the shoulder blade (scapula) and the collar bone (clavicle) meet.
What is axial and appendicular bones?
The bones of the human skeleton are divided into two groups. The appendicular skeleton includes all the bones that form the upper and lower limbs, and the shoulder and pelvic girdles. … The axial skeleton includes the bones that form the skull, laryngeal skeleton, vertebral column, and thoracic cage.
Is the temporal axial or appendicular?
The temporal bone is part of the axial skeleton. There are two temporal bones in the body, one found on each side of the head.
What are the example of appendicular?
The appendicular skeleton includes the bones of the shoulder girdle, the upper limbs, the pelvic girdle, and the lower limbs.
What organ is behind your left shoulder blade?
The spleen sits under your rib cage in the upper left part of your abdomen toward your back. It is an organ that is part of the lymph system and works as a drainage network that defends your body against infection.
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 organ is below right shoulder blade?
Shaped like a tiny pear, your gallbladder resides on your right side, just below your liver. It stores bile, which is a vital fluid your liver manufactures that plays an essential role in digestion. Every time you eat, your gallbladder releases bile that travels through ducts into your small intestine.
How do you wear a scapular?
It is similar to a poncho, placed over the head, sleeveless, and covers the wearer’s front and back down to below the knees. As scapular popularity grew among religious communities, laypeople also wanted to wear such garments as they sought to imitate the pious, holy ways of the monks.
Is Scapulae singular form?
Scapula: The shoulder blade (or “wingbone”), the familiar flat triangular bone at the back of the shoulder. The word “scapula” (with the accent on the first syllable) is Latin. The Romans always employed the plural “scapulae”, the shoulder blades. … The term “subscapular” means under (sub) the scapula.
Where is the medial border of scapula?
The thin medial border of the scapula runs parallel to the spinous processes of the thoracic vertebrae; hence, it is often called the vertebral border [2]. Four muscles attaches to the medial border.
What bones are sesamoid?
A sesamoid bone is a small round bone that is imbedded within a tendon, whose purpose is to reinforce and decrease stress on that tendon. You will mostly find sesamoid bones in the knee, thumb, and big toe1.
Are carpal bones sesamoid?
The pisiform bone (/ˈpaɪsɪfɔːrm/ or /ˈpɪzɪfɔːrm/), also spelled pisiforme (from the Latin pisifomis, pea-shaped), is a small knobbly, sesamoid bone that is found in the wrist. It forms the ulnar border of the carpal tunnel.
How many sesamoid bones are there?
Typically there are five sesamoid bones in each hand; two at the metacarpophalangeal (MCP) joint of the thumb, one at the interphalangeal (IP) joint of the thumb, one at the MCP joint of the index finger on the radial side, and one at the MCP joint of the little finger on the ulnar side.
What are the vertebral levels?
There are 7 cervical (neck), 12 thoracic (chest), 5 lumbar (back), and 5 sacral (tail) vertebrae. The spinal cord sends roots that exit the spinal canal between vertebral bodies. Spinal cord segmental levels are defined by their roots but are not always situated at the corresponding vertebral levels.
What are the borders of spine of scapula?
The scapula is described as having superior, medial, and lateral borders. Posteriorly, the scapula is divided into a supraspinous fossa and infraspinous fossa by the scapular spine. Anteriorly, on the costal surface, is the shallow subscapular fossa. Laterally is the glenoid fossa.
What vertebral level is the posterior superior iliac spine?
The line joining the superior aspect of the iliac crests posteriorly (the intercristal line) is commonly stated to cross the midline at the L4 or L4–5 spinal level on imaging.
