Spaces

Question 1

Quadrangular Space

Answer 1

Boundaries:
Lateral - lateral head of the triceps brachii muscle
Medial - long head of the triceps brachii muscle
Superior - teres minor
Inferior - teres major

Contents:
Axillary Nerve
Posterior Circumflex Humeral Artery

Question 2

Triangular Space

Answer 2

Boundaries:
Superior - Teres Minor Muscle
Inferior - Teres Major Muscle
Lateral - Long Head of Triceps Brachii

Contents:
Circumflex scapular artery

Question 3

Deltopectoral Triangle

Answer 3

Boundaries:
Superior - Clavicle
Medial - Pectoralis Major
Lateral - Deltoid

Contents:
Cephalic Vein
Deltoid Branch of Thoracoacromial Trunk Artery

Question 4

Axilla

Answer 4

Definition: Pyrimidal Space inferior to the glenohumeral joint and superior to the axillary fascia at the junction of the arm and the thorax

Boundaries:
Apex - 
     Medially - First Rib
     Anteriorly - Clavicle
     Posteriorly - Superior Border of the Scapula/
     Subscapularis
Base - 
     Skin (most superficially)
     Subcutaneous Tissue
     Axillary Fascia (deepest)
Anterior Wall - 
     Pectoralis Major
     Pectoralis Minor
Posterior Wall - 
     Teres Major
     Latissimus Dorsi - inferiorly
     Subscapularis - superiorly
Medial Wall - 
     Thoracic Wall
     Serratus Anterior
Lateral Wall - 
     Intertubercular groove of the humerus

Contents:
     Lymphatic Vessels and Lymph Nodes
     Axillary Artery and its branches
     Axillary Vein
     Brachial Plexus

Question 5

Triangular Interval

Answer 5

Boundaries:
Lateral - lateral head of triceps brachii muscle
Medial - long head of the triceps brachii muscle
Superior - Teres Major

Contents:
Radial Nerve
Profunda Brachii Artery

Question 6

Cubital Fossa

Answer 6

Boundaries:
Lateral - brachioradials muscle
Medial - Pronator Teres Muscle
Superior - Line between the medial and lateral epicondyles      
                of the humerus
Roof - Superficial Fascia, Subcutaneous Tissue, Bicipital 
          Aponeurosis, and Skin
Floor - Brachialis, Supinator

Contents:
Veins: 
     Median Cubital Vein
     Cephalic Vein (lateral)
     Basilic Vein (medial)
Arteries:
     Brachial Artery
Nerves:
     Medial Nerve
Biceps Brachii Muscle Tendon and Bicipital Aponeurosis (goes anterior to the median nerve and brachial artery)

Question 7

Medial Cubital Tunnel

Answer 7

Aperture found posterior to the medial epicondyle of the humerus for passage of the ulnar nerve

“Funny Bone”

Question 8

Flexor Retinaculum - Structures that pass superficial

Answer 8

Palmaris Longus Tendon, Ulnar Nerve, Ulnar Artery, Flexor Carpi Ulnaris Tendon

Question 9

Flexor Retinaculum - Structures that pass deep

Answer 9

Carpal Tunnel: 4 tendons of FDS, 4 tendons of FDP, Median Nerve, Tendon of Flexor Pollicis Longus

Compartment for Tendon of Flexor Carpi Radialis: Tendon of Flexor Carpi Radialis

Question 10

Contents of Compartments Deep to the Extensor Retinaculum

Answer 10

1st Compartment: Tendon of Abductor Pollicis Longus, Tendon of Extensor Pollicis Brevis

2nd Compartment: Extensor Carpi Radialis Longus

3rd Compartment: Extensor Pollicis Longus

4th Compartment: 4 tendons of extensor digitorum and underlying tendon of extensor indicis

5th compartment: Tendon of extensor digiti minimi

6th compartment: Tendon of extensor carpi ulnaris

Question 11

Anatomic Snuffbox

Answer 11

Boundaries:
Lateral - Tendon of abductor pollicis longus and tendon of extensor pollicis brevis
Medial - Tendon of Extensor Pollicis Longus

Contents:
Superficial: Superficial Branch of the Radial Nerve, Lateral Antebrachial Cutaneous Nerve, Cephalic Vein
Deep: Radial Artery

Question 12

Guyon’s Canal

Answer 12

Between the pisiform and the hook of the hamate; superficial to the flexor retinaculum; ulnar nerve and artery run through here