What divides the posterior side of the scapula?

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.

Besides, what divides the scapula into uneven portions?

Processes. Spine or Spinuous Process is a triangular plate of bone with 3 borders and 2 surfaces. It divides the dorsal surface of the scapula into supraspinous and infraspinous fossae. The posterior border is called the crest of the spine which has upper and lower lips.

Likewise, which is the posterior surface of the body of the scapula? 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.

One may also ask, what are the names of the two Fossae located on the posterior scapula?

The scapula has three depressions, each of which is called a fossa (plural = fossae). Two of these are found on the posterior scapula, above and below the scapular spine. Superior to the spine is the narrow supraspinous fossa, and inferior to the spine is the broad infraspinous fossa.

How is scapula attached?

The scapula is also known as the shoulder blade. 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!)

Why is the pectoral girdle an incomplete ring?

The pectoral girdle is an incomplete ring because it is open in the back between the The medial ends of the clavicles areticulate with the what of the sternum? The lateral ends of the clavicles areticulate with the what of the scapulae? This divides the scapula into unequal portions.

What are the five palmar bones?

Hand and Wrist Bones – Anterior (Palmar) ViewThe proximal row of bones in the hand include the scaphoid, lunate, triquetral, and pisiform bone. The distal row of bones in the hand include the trapezium, trapezoid, capitate, hamate bone. The metacarpals support the palm.

What bone serves as a brace between the sternum and scapula?

Clavicle

What part of the scapula articulates with the clavicle?

The scapula articulates with the clavicle through the acromion process, a large projection located superiorly on the scapula forming the acromioclavicular joint.

What bones are in your upper arm?

The humerus is the only bone of the upper arm. It is a long, large bone that extends from the scapula of the shoulder to the ulna and radius of the lower arm. The proximal end of the humerus, known as the head, is a round structure that forms the ball of the ball-and-socket shoulder joint.

When a person sits what supports the weight of the body?

The posterior margin of the ilium has the large greater sciatic notch. The posterolateral portion of the hip bone is the ischium. It has the expanded ischial tuberosity, which supports body weight when sitting. The ischial ramus projects anteriorly and superiorly.

What does the lateral end of the clavicle articulate with?

Medially, it articulates with the manubrium of the sternum (breastbone) at the sternoclavicular joint. At its lateral end it articulates with the acromion, a process of the scapula (shoulder blade), at the acromioclavicular joint. It has a rounded medial end and a flattened lateral end.

Where is the acromion found?

The acromion process is a bony structure located at the top of the scapula. This process provides an articulation (connection) point with the clavicle, which also produces the acromioclavicular joint.

What is the anatomical name of the lateral projection off the spine of the scapula?

Acromion - flat, lateral aspect of the spine of the scapula. Supraspinous Fossa - supraspinous means above (supra- superior- above) the spine (spinous) of the scapula. It's smaller than the infraspinous fossa but it's pretty deep. The supraspinatus muscle originates here.

Which terms correctly describe the scapula?

The scapula (commonly known as the shoulder blade) is a triangular shaped bone which has a part called the glenoid that forms the “socket” for the head of the humerus. The glenoid cavity is not even half the size of the humeral head so it does not provide the joint with much stability.

What does the scapula do?

The scapula is commonly referred to as the shoulder blade. It connects the humerus bone of the arm to the collarbone. There are only three muscles that are responsible for enabling the movement of the shoulder blade. The trapezius muscle implants into the collarbone.

How does the scapula work?

The scapula, commonly referred to as the shoulder blade, is the bone that sits above the rib cage in the upper back. It creates the shoulder joint where it meets with the head of the humerus—the bone of the upper arm. The scapulae can move in six directions and each movement is produced by specific, primary muscles.

Is the scapula part of the trunk?

The scapula, also known as the shoulder blade, is a flat triangular bone located at the back of the trunk and resides over the posterior surface of ribs two to seven. It also articulates with the humerus and clavicle, forming the glenohumeral (shoulder) joint and acromioclavicular joint respectively.

How do you strengthen your scapula?

Draw elbows back while squeezing shoulder blades together behind you. You should feel the muscles between your shoulder blades activate and your chest open up. This strengthens the scapular muscles that for improved posture and scapular positioning. Perform 2 sets of 10.

How many bones are in scapula?

two

What are the 3 angles of the scapula?

As it is a flat triangle, the scapula has three angles (superior/medial, lateral, inferior), three borders (medial, lateral/axillary, and superior), and two surfaces (ventral and dorsal). On top of that, the scapula has three processes, the acromion, the spine, and the coracoid process.

Where is the scapula located?

Scapula: More commonly known as the shoulder blade, the scapula is a flat triangular bone located in the upper back. It connects with the collarbone at the front of the body. Humerus: The largest bone of the arm, the humerus connects to the scapula and clavicle in the shoulder.

What is the muscle under the shoulder blade called?

The rhomboid muscles in your upper back connect the inner edges of your shoulder blades to your spine. A rhomboid strain is a stretch or tear of these muscles.

What does the scapula look like?

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.