Practical 1 Triangles

Question 1

Deltopectoral Triangle:

Borders?
What runs through it?

Answer 1

Superior border = clavicle
Medial border = clavicular head of pectoralis major
Lateral border = anterior deltoid

Structures inside = cephalic vein

Question 2

What is the Deltopectoral Groove?

Answer 2

A depression btw pectoralis major and the deltoid

Question 3

Triangle of Auscultation

Significance?

Borders?

What intercostal space is this area at?

Answer 3

Significance = well suited for listening to sounds produced by thoracic organs, particularly the lungs

Inferior border = latissimus dorsi
Lateral border = Rhomboid major
Medial border = trapezius

6th intercostal space

Question 4

Lumbar Triangle (of Petit)

Borders?

Significance?

Answer 4

Medial border = latissimus dorsi
Lateral border = external oblique
Inferior border = iliac crest
Floor = internal oblique

Site of lumbar hernia

Question 5

Quadrangular Space

Borders?

What runs through this space?

Answer 5

Superior border = teres minor
Inferior border = teres major
Medial border= long head of triceps brachial
Lateral border = surgical neck of humerus

Contents = axillary nerve & posterior circumflex humeral artery

Question 6

Triangular Space

Borders?

Contents?

Answer 6

Superior border = Teres minor
Inferior border = teres major
Lateral border = long head of triceps brachial

Contents= Circumflex scapular artery