Bisc 130 Superficial Back And Deltoid Region/brachium

Front 1

What constitutes the Triangle of Auscultation?

Back 1

Bounded superiorly by the trapezius, inferiorly by the latissimus dorsi, and laterally by the vertebral border of the scapula.

Good place to place stethoscope to hear breath sounds.

Front 2

What muscles attach the scapula to the trunk?

Back 2

Pectoralis major, serratus anterior, trapezius, rhomboids (major and minor), and levator scapulae

Front 3

What would occur if the long thoracic nerve was damaged, paralyzing the serratus anterior?

Back 3

Winging of the scapula

Front 4

What muscles protract the scapula?

Back 4

Serratus anterior and pectoralis minor

Front 5

What muscles retract the scapula?

Back 5

Trapezius (middle) and rhomboids

Front 6

What muscles elevate the scapula?

Back 6

Levator scapulae and trapezius (upper)

Front 7

What muscles depress the scapula?

Back 7

Pectoralis minor, trapezius (lower) and latissimus dorsi (when it attaches to the inferior scapula)

Front 8

Where does rotation occur in the scapula?

Back 8

Around a horizontal axis through the middle of the scapular spine and the sternoclavicular joint

Front 9

What muscles can medially rotate the scapula? What is medial rotation also known as?

Back 9

Levator scapulae, rhomboids, and pectoralis major

Medial rotation is also known as downward rotation, as the glenoid in pointed down.

Front 10

What muscles can laterally rotate the scapula? What is lateral rotation also known as?

Back 10

Trapezius (upper/lower) and serratus anterior

Lateral rotation is also known as upward rotation, because the glenoid cavity points up.

Front 11

What is accomplished by contracting all muscles that attach the scapula to the trunk?

Back 11

A stable base is formed on which movements of the upper limb can take place.

Front 12

What is unusual about the insertion of the latissimus dorsi?

Back 12

The muscle twists on itself as it inserts into the intertubercular groove of the humerus; the lower border becomes the upper border (and vice versa) at insertion.

Front 13

What muscles (7) attach the humerus to the scapula?

Back 13

Deltoid, teres major, coracobrachialis, subscapularis, supraspinatus, infraspinatus, teres minor

Front 14

What are the four rotator cuff muscles?

Back 14

Subscapularis, supraspinatus, infraspinatus, teres minor

Front 15

How is shoulder motion inhibited by a rotator cuff tear?

Back 15

The arm can't be lifted above shoulder level, as the deltoid is the only muscle contracting to bring the humerus up.

Front 16

What two muscles of the deltoid region are innervated by the axillary nerve?

Back 16

Deltoid and teres minor

Front 17

What movements are possible at the shoulder?

Back 17

Flexion, extension, abduction, adduction, and rotation (lateral and medial)

Front 18

What is the significance of the scapular anastomosis?

Back 18

It permits blood to pass from the first part of the subclavian artery to the third part of the axillary artery when either vessel (subclavian or axillary) is blocked between these points.

Front 19

What nerve and vessel are transmitted through the quadrangular space?

Back 19

Axillary nerve and posterior humeral circumflex artery

Front 20

What are the boundaries of the quadrangular space (from posterior view)?

Back 20

Superior: teres minor
Inferior: teres major
Medial: long head of triceps
Lateral: surgical neck of humerus

Front 21

What vessel is transmitted through the Triangular Space?

Back 21

Circumflex scapular artery

Front 22

What muscles make up the anterior compartment of the arm?

Back 22

Long head of the biceps, short head of the biceps, brachialis, and coracobrachialis

Front 23

What muscle in the anterior brachium is the most powerful supinator?

Back 23

Biceps (long head)

Front 24

What nerve innervates all four muscles of the anterior brachium?

Back 24

Musculocutaneous nerve

Front 25

What movements do the muscles of the anterior brachium allow?

Back 25

Flexion of the shoulder, flexion of the elbow, and supination of the forearm

Front 26

What muscles compose the posterior compartment of the brachium?

Back 26

Lateral, long, and medial heads of the triceps

Front 27

What arm muscle is considered the 'workhorse' of elbow flexion?

Back 27

The brachialis (can flex the elbow no matter what position it's in)

Front 28

True or false: Of the three heads of the triceps, one is superficial and two are deep.

Back 28

False; the medial head is deep, while the lateral and long heads of the triceps are superficial.

Front 29

What are the six components of the NAV of the arm?

Back 29

Brachial artery, brachial and basilic veins, median nerve, ulnar nerve, radial nerve, and medial antebrachial cutaneous nerve