DR1 The Back and Shoulder

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30 Questions

Which muscles attach the pectoral girdle to the trunk?

Latissimus dorsi

Where do the upper fibres of the trapezius muscle originate from?

External occipital protuberance of the skull

Which muscles lie below the trapezius muscle?

Rhomboids

What is the origin of the rhomboid muscles?

Spinous processes of the lower thoracic vertebrae

Where does the latissimus dorsi muscle have its origin from?

Thoracolumbar fascia of the back

Where does the trapezius muscle insert into?

Clavicle, acromion, and spine of the scapula

Which fibres of the trapezius muscle originate from the spinous processes of the lower thoracic vertebrae?

Lower fibres

Which muscle originates from a series of individual slips from the upper eight ribs and inserts along the medial border of the scapula?

Serratus anterior

Which muscle group incorporates spinalis, longissimus, and iliocostalis?

Erector spinae

Which muscle is located deep to the erector spinae muscle and runs superiorly from its origin on the transverse processes to its insertion on the spinous processes?

Multifidus

Which bones articulate at the acromioclavicular joint?

Clavicle and scapula

Which joint comprises a shallow articulation between the head of the humerus and the glenoid fossa of the scapula?

Glenohumeral joint

Which muscle passes through a small space formed by the coracoacromial ligament and can be impinged during repetitive overhead activities?

Supraspinatus

Which space is formed by teres minor, teres major, the shaft of the humerus, and the long head of triceps brachii?

Quadrangular space

Which muscles form the walls of the axilla?

Pectoralis major, Serratus anterior, Pectoralis minor, Latissimus dorsi

Which nerve supplies the serratus anterior muscle?

Long thoracic nerve

Which artery is a continuation of the subclavian artery?

Axillary artery

What divides the axillary artery into three parts?

Pectoralis minor muscle

What is the terminal branch of the brachial plexus that supplies the deltoid muscle?

Musculocutaneous nerve

What are the four rotator cuff muscles?

Supraspinatus, Infraspinatus, Teres minor, Subscapularis

What is the origin of the infraspinatus muscle?

Infraspinous fossa

Which muscle of the shoulder has an origin from the subscapular fossa and inserts onto the lesser tubercle of the humerus?

Subscapularis

Which muscle gives the characteristic rounded shape to the shoulder?

Deltoid

Which muscle has an origin from the inferior angle of the scapula and inserts onto the medial lip of the intertubercular sulcus of the humerus?

Teres major

Which nerve passes through the quadrangular space?

Axillary nerve

Which ligament forms an arch superiorly over the glenohumeral joint?

Coracoacromial ligament

Which ligament helps stabilize the glenohumeral joint anteriorly?

Glenohumeral ligament

Which structure deepens the shallow glenoid fossa?

Glenoid labrum

Which muscle is NOT part of the rotator cuff?

Deltoid

Which muscle has an origin from the lateral third of the clavicle, the acromion, and spine of the scapula?

Deltoid

Test your knowledge of the axilla and its anatomical structures with this quiz. Learn about the apex, base, and four walls of the axilla, as well as the muscles that form its boundaries. Perfect for anatomy enthusiasts and medical students.

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