Anatomy of pectoral girdle

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What is the name of the part of the scapula that you can feel when you touch your shoulder?
The acromion
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What is the piece of bone which projects anteriorly from just next to the acromion?
The coracoid process
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Where is the spine of the scapula located?
On the posterior of the scapula, superiorly (near upper border)
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What are the names of the area of the scapula above and below the spine of the scapula?
Supraspinous fossa and infraspinous fossa
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What is the function of the clavicle?
It is the only attachment point of the upper limb to the sternum, any forces passing through the upper limb pass through the clavicle to reach the sternum, it also helps guide movement of the pectoral girdle
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What are the names of the 2 joints at the pectoral girdle?
The acromioclavicular joint and the sternoclavicular joint
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What types of joints are the 2 joints of the pectoral girdle?
Acromioclavicular= plane joint which allows sliding. Sternoclavicular= synovial joint which acts like a ball in socket joint
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What movement of the upper limb would cause lateral/medial rotation of the scapula?
Lateral- abduction Medially- adduction
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What is the name of the movements done when you shrug then relax your shoulders?
Elevation and depression
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What movement of the arm would bring about protraction and retraction of the scapula?
Reaching out forwards and then bringing the arm back inwards
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Where does the pectoralis major originate and insert?
Originate- sternum, costal cartilages and the clavicle Inserts-Small area of humorous
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Where does pectoralis minor originate and insert?
Originates from ribs 3-5 and inserts into the coracoid process of the scapula
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What movements doe pectoralis major bring about at the shoulder joint?
Adduction and medial rotation
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How does pectoralis major help with breathing when arms are in a fixed position?
It helps to bring the ribcage upwards and out to draw in more air
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What is the name of the large fan shaped muscle which makes the rounded shape of the shoulder?
Deltoid
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Where does the deltoid originate and insert?
Originates from the spine of the scapula, clavicle and acromion and insert into a muscle attachment point on the lateral side of the humorous
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What movements can the deltoid bring about at the shoulder joint?
Flexion, extension, abduction, medial and lateral rotation
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What is the large fan shaped muscle located on the posterior of the shoulder joint?
Trapezius
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Where does trapezius originate and insert?
Large origin spanning the cervical and thoracic vertebrae and inserts into the spine of the scapula and the acromion
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What are the 3 sections of the trapezius and what movements will they bring about?
Upper= elevation Middle= retraction Lower=depression
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What is the flat sheet of muscle located inferior to the trapezius?
Latissimus dorsi
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Where does the lat dorsi originate and insert?
Originates from the lower vertebral column and inserts into anterior of humorous
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What movements does lat dorsi bring about?
Adduction and extension at shoulder joint
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Where to the levator scapulae and rhomboid muscles lie?
Under the cover of the trapezius
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Where do the rhomboid mussels originate and insert?
Originate from cervical and thoracic vertebrae and insert into the medial border of the scapula
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Where does levator scapula originate and insert?
Originates from cervical vertebrae and inserts into the upper angle of the scapula
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Where is rhomboid minor located in comparison to rhomboid major?
Superior (just above)
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What muscle originates from the supraspinous fossa and inserts into the proximal end of the humerous?
Supraspinatous
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What is the name of the muscle which originates from the infraspinous fossa and inserts into the proximal end of the humorous?
Infraspinatous
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Where does theres minor originate and insert?
Originates from lateral border of scapula and inserts just below infraspinatous on the humorous
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Where does theres major originate and insert?
Originates from lateral border of scapula and inserts into anterior side of the proximal end of the humorous
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What movement does supraspinatous intiate?
Shoulder abduction
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What movement do infraspinatous and teres minor bring about?
Lateral rotation at the shoulder joint
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What movements does teres major cause?
Medial rotation and adduction
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Where is subscapularis located and where does it originate and insert?
Beneath the scapula (anterior surface) between scapula and ribs, originates from medial border and inserts into anterior of humorous
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Where does serratus anterior originate and insert?
Originates from ribs 1-8 and inserts into medial border
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Why is serratus anterior important?
It is key in bringing about protraction of the scapula and is essential in keeping the scapula in contact with the chest wall so very important is pectoral girdle stability
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What is the rotator cuff?
A collar of muscle surrounding the shoulder joint allowing it to move and helping its stability
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What are the 4 muscles which make up the rotator cuff?
supraspinatous, infraspinatous, teres minor and subscapularis
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Other cards in this set

Card 2

Front

What is the piece of bone which projects anteriorly from just next to the acromion?

Back

The coracoid process

Card 3

Front

Where is the spine of the scapula located?

Back

Preview of the front of card 3

Card 4

Front

What are the names of the area of the scapula above and below the spine of the scapula?

Back

Preview of the front of card 4

Card 5

Front

What is the function of the clavicle?

Back

Preview of the front of card 5
View more cards

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