What is the glenohumeral joint?

What is the glenohumeral joint?

The glenohumeral joint is a ball and socket joint that includes a complex, dynamic, articulation between the glenoid of the scapula and the proximal humerus. Specifically, it is the head of the humerus that contacts the glenoid cavity (or fossa) of the scapula.

Where is the scapula located?

shoulder blade
The scapula is a flat, triangular-shaped bone (colloquially as the “shoulder blade”). It is located in the upper thoracic region on the dorsal surface of the rib cage. It connects with the humerus at the glenohumeral joint as well as the clavicle at the acromioclavicular joint to form the shoulder joint.

Where is the acromion bone located?

scapula
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.

What is Circumduction of the shoulder joint?

Circumduction is the orderly combination of shoulder movements so that the hand traces a circle and the arm traces a cone. In order it is produced by shoulder flexion, abduction, extension and abduction (or the reverse).

What makes up the glenohumeral joint?

The glenohumeral joint is where the ball (humeral head) and the socket (the glenoid) meet. The rotator cuff connects the humerus to the scapula and is made up of the tendons of four muscles, the supraspinatus, infraspinatus, teres minor and the subscapularis. Tendons attach muscle to bone.

Why is it called the glenohumeral joint?

The shoulder joint (or glenohumeral joint from Greek glene, eyeball, + -oid, ‘form of’, + Latin humerus, shoulder) is structurally classified as a synovial ball and socket joint and functionally as a diarthrosis and multiaxial joint.

What 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.

Is 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 does Circumduction mean in anatomy?

Medical Definition of circumduction : movement of a limb or extremity so that the distal end describes a circle while the proximal end remains fixed.

What is Circumduction example?

The circular (or, more precisely, conical) movement of a body part, such as a ball-and-socket joint or the eye. It consists of a combination of flexion, extension, adduction, and abduction. “Windmilling” the arms or rotating the hand from the wrist are examples of circumductive movement.

Hvad er skulderleddet?

Skulderen består af knogle, ledbånd, sener og muskler, som forbinder armen med kroppen. De tre knogler, som udgør skulderleddet, er kravebenet (clavicula), skulderbladet (scapula) og overarmsknoglen (humerus). Skulderen har to led, som samarbejder for at sikre armens bevægelser.

Hvad er skulderens muskler?

Skulderens muskler består af de store skuldermuskler, der kan ses udefra. De fungerer som de stærke muskler til skulderen. Under disse er der en muskelgruppe kaldet rotator cuff. Den består af fire små muskler, hvis funktion er at stabilisere og koordinere skulderbevægelserne, så de store muskler kan bruge deres kraft.

Hvad er skulderleddets bevægelighed?

Skulder. Skulderleddets konstruktion hos mennesket er grundlag for armens meget store bevægelighed, en arv fra vore træklatrende forfædre. Ved store bevægeudslag ændrer også skulderbladet stilling: Når armen hæves fra nedhængende til lodret (180°), roterer skulderbladet således 60° udad, og nøglebenet rettes stejlt opad.

Hvad er årsagen til skuldersmerter?

Irritation og svækkelse af denne muskels sene er en almindelig årsag til skuldersmerter. Skulderens afrundede kontur fremkaldes af musculus deltoideus, deltamusklen, der medvirker ved alle bevægelser i skulderleddet.