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CBN111: Shoulder (Axilla)
Medical Gross Anatomy, Fall 2011, USouthAL, Fields
25
Medical
Professional
08/24/2011

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Cards

Term
What is the pectoral girdle?
Definition
Where the clavicle meets the scapula
Term
[image]
Definition
1. clavicle
2. acromion process of the scapula
3. greater tubercle of the humerus
4. intertubercular sulcus
5. lesser tubercle of the humerus
6. coracoid process of the scapula
7. subscapular fossa
8. suprascapular notch
Term
At what vertebral level can one find the superior angle of the scapula? The inferior angle?
Definition
Superior = T2, Inferior = T7
Term
[image]
Definition
1. superior angle
2. supraspinous fossa
3. suprascapular notch
4. acromion process of the scapula
5. spiral/radial groove of the humerus
6. head of the humerus
7. glenoid fossa
8. spine of the scapula
9. infraspinous fossa
10. inferior angle of the scapula
Term
What structure crosses and creates a "foramen" at the suprascapular notch?
Definition
The transverse scapular ligament.
Term
What travels through the suprascapular foramen?
Definition
The suprascapular artery (branch of subclavian artery) and suprascapular nerve (derived from upper trunk, C5-C6).
Term
[image]
Definition
1. Trapezius
2. Latissimus dorsi
3. Levator scapulae
4. Rhomboid minor
5. Rhomboid major
6. Serratus anterior
Term
What innervates the trapezius?
Definition
CNXI, the Accessory Nerve
Term
What innervates the Latissimus dorsi?
Definition
thoracodorsal nerve, from the posterior cord of the brachial plexus (C6,7,8)
Term
What innervates the levator scapulae?
Definition
The dorsal scapular nerve, from the ventral ramus of C5
Term
What innervates the rhomboid muscles (major and minor)?
Definition
dorsal scapular nerve, ventral ramus of C5
Term
What innervates the serratus anterior?
Definition
long thoracic nerve, from the ventral rami of C5,6,7
Term
[image]
Definition
1. deltoid
2. abduct the arm 90 deg.
3. axillary n. (C5-6)
Term
[image]
Definition
1. supraspinatus
2. abduct arm the first 15 deg.
3. suprascapular n. (C5-6)
Term
[image]
Definition
1. infraspinatus
2. lateral rotator of arm
3. suprascapular n.
Term
[image]
Definition
1. teres minor
2. lateral rotator of arm
3. axillary n. (C5-C6)
Term
[image]
Definition
1. teres major
2. extensor and adductor of arm
3. lower subscapular n. (C5-6)
Term
[image]
Definition
1. long head of triceps
2. extensor of arm
3. radial n.

Note - this is an important landmark muscle. Also, all extensors are innervated by the radial nerve.
Term
What is the most important motion of the shoulder to examine for nerve lesions on C5-C6?
Definition
Abduction, bringing the arm away from the body.
Term
[image]
Definition
Triangular space. Borders include the teres minor (superior), teres major (inferior) and long head of triceps (lateral). Contents are the scapular circumflex artery.
Term
[image]
Definition
Quadrangular space. Borders include teres minor (superior), teres major (deep), long head of triceps (medial), shaft of humerus (lateral). Contents include the axillary nerve and the posterior humeral circumflex artery.
Term
[image]
Definition
1. Acromioclavicular ligament. Attaches to the acromion process of the scapula and the clavicle.
2. Coricoacromial ligament. Attaches to the coracoid and acromion processes of the scapula.
3. Trapezoid coracoclavicular ligament attaches to the clavicle and coracoid process.
4. Conoid Coracoclavicular ligament attaches to the clavicle and coracoid process.
5. Joint capsule (synovial capsule)
Term
What happens if you tear the ligaments holding your shoulder to your clavicle?
Definition
Only muscle will be left holding the shoulder to the body; the clavicle is the only articulation point between the shoulder and the body wall.
Term
Where is the weakest point of the shoulder joint?
Definition
Inferior
Term
What four muscles make up the musculotendinous cuff of the shoulder? (ie rotator cuff)
Definition
The supraspinatus (superior), subscapularis (anterior), infraspinatus (posterior), and teres minor (posterior)
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