Anatomy Flashcards
Human skeleton has ___ bones.
206
Number of bones in the axial skeleton.
80
Number of bones in appendicular skeleton.
126
First bone in body to ossify.
Clavicle.
Primary shoulder stabilizer in anterior translation with the arm abducted to 45 degrees.
Middle glenohumeral ligament.
Primary shoulder restraint in external rotation of the adducted arm.
Superior glenohumeral ligament.
Primary shoulder stabilizer for anterior and inferior translation in abduction.
Inferior glenohumeral ligament.
Intrinsic ligaments of the scapula (3).
- Superior transverse scapular ligament
- Inferior transverse scapular ligament
- Coracoacromial ligament
Muscles connecting the upper limb to the vertebral column (4).
- Trapezius
- Latissimus
- Rhomboid muscles
- Levator scapulae
Muscle connecting the upper limb to the thoracic wall (3).
- Pectoralis muscle
- Subclavius
- Serratus anterior
Roots contributing to the brachial plexus.
C5-T1
How cords of the brachial plexus are named.
Anatomic relationship to the axillary artery.
Brachial plexus lateral cord terminations (2).
- Musculocutaneous nerve
- Lateral pectoral nerve
- Median nerve
Brachial plexus posterior cord terminations (5).
- Radial nerve
- Axillary nerve
- Upper subscapular nerve
- Lower subscapular nerve
- Thoracodorsal nerve
Brachial plexus medial cord terminations (5).
- Ulnar nerve
- Medial pectoral nerve
- Medial brachial cutaneous nerve
- Medial antebrachial cutaneous nerve
- Median nerve
Supraspinatus innervation.
Suprascapular nerve.
Infraspinatus innervation.
Suprascapular nerve.
Teres minor innervation.
Axillary nerve.
Subscapularis innervation.
Upper and lower subscapular nerves.
Suprascpular nerve roots.
C5,6
Axillary nerve roots.
C5,6
Erb-Duchenne palsy root involvement.
C5,6
Klumpke’s palsy root involvement.
C8,T1
Better prognosis, Erb-Duchenne palsy or Klumpke’s?
Erb-Duchenne
Serratus anterior muscle dysfunction results in this.
Medial scapular winging.
Trapezius muscle dysfunction results in this.
Lateral scapular winging.
Four branches of the thoracoacromial artery.
- Deltoid
- Acromial
- Pectoralis
- Clavicular
Two branches of axillary artery in Part II.
- Thoracoacromial
2. Lateral thoracic
Three branches of axillary artery in Part III.
- Subscapular
- Anterior humeral circumflex
- Posterior humeral circumflex
Subclavian artery becomes axillary artery here.
After passes under clavicle.
Relationship to this structure organizes classification of axillary artery.
Pectoralis minor.
Glenoid position relative to plane of scapula.
Retroverted 5 deg.
Spiral groove of humerus position relative to the articular surface of trochlea.
13cm proximal.
Strongest of all elbow ligaments.
Anterior bundle of medial ulnar collateral ligament.
Anterior bundle of medial ulnar collateral ligament taut during this range.
60 to full extension.
Components of the medial ulnar collateral ligament (3).
- Anterior bundle
- Transverse bundle
- Posterior bundle
Eponym of transverse bundle of ulnar collateral ligament.
Cooper.
This is the most important constraint against valgus force at the elbow.
Anterior bundle of medial ulnar collateral ligament.
Anterior bundle of ulnar collateral ligament attaches here.
18mm distal to tip of coronoid.
Deficiency of this results in posterolateral rotatory instability.
Lateral ulnar collateral ligament.
Borders of the quadrilateral space.
- Superior: teres minor
- Lateral: surgical neck of humerus
- Medial: long head of triceps
- Inferior: teres major
Structures in the quadrilateral space (2).
- Axillary nerve
2. Posterior humeral circumflex artery
Borders of the triangular space.
- Superior: teres minor
- Lateral: long head of triceps
- Medial: teres major
Borders of the triangular interval.
- Superior: teres major
- Lateral: shaft of humerus
- Medial: long head of triceps
Structures in the triangular interval (2).
- Radial nerve
2. Profunda brachii artery
Structure in the triangular space.
Circumflex scapular artery.
Radial nerve pierces the lateral intermuscular septum here in relation to the trochlea.
7.5cm proximal to trochlea.
Median nerve accompanies this structure in the arm.
Brachial artery.
Termination of the musculocutanous nerve.
Lateral antebrachial cutaneous nerve.
Brachial artery bifurcates into these (2).
- Radial artery
2. Ulnar artery
Kocher interval to elbow.
Between anconeus (radial n.) and ECU (PIN).
Portals for elbow arthroscopy (3).
- Anterolateral portal
- Anteromedial portal
- Posteromedial portal
Structure at risk with anterolateral arthroscopy portal of elbow.
Radial nerve.
Structure at risk with anteromedial arthroscopy portal of elbow (2)
- Medial antebrachial cutaneous nerve
2. Median nerve
Distal radioulnar joint most stable in this position.
Supination.
Innervation of pronator teres.
Median nerve.
Innervation of flexor carpi radialis.
Median nerve.
Innervation of palmaris longus.
Median nerve.
Innervation of flexor carpi ulnaris.
Ulnar nerve.
Innervation flexor digitorum superficialis.
Median nerve.
Innervation of flexor digitorum profundus.
Median (AIN) and ulnar nerves
Innervation of flexor pollicis longus.
Median (AIN) nerve
Innervation of pronator quadratus.
Median (AIN) nerve
Innervation of brachioradialis.
Radial nerve.
Innervation of extensor carpi radialis longus.
Radial nerve.
Innervation of extensor carpi radlis brevis.
Radial nerve.
Innervation of anconeus.
Radial nerve.
Innervation of extensor digitorum.
PIN
Innervation of extensor digiti minimi.
PIN
Innervation of extensor carpi ulnaris.
PIN
Innervation of supinator.
PIN
Innervation of abductor pollicis longus.
PIN
Innervation of extensor pollicis brevis.
PIN
Innervation of extensor pollicis longus.
PIN