2.1.1. The Humerus Flashcards
What does the Proximal part of the Humerus articulate with?
The Glenoid Fossa of the Scapula
What are the 6 important Proximal Features of the Humerus?
- The Head of the Humerus
- The Anatomical Neck of the Humerus
- The Surgical Neck of the Humerus
- The Greater Tubercle of the Humerus
- The Lesser Tubercle of the Humerus
- The Intertubercular Sulcus
What connects the Head to the Greater and Lesser Tubercles of the Humerus?
The Anatomical Neck
Where is the Greater Tubercle located on the Humerus?
Laterally
- How many Faces does the Greater Tubercle of the Humerus have?
- What are they?
- 2
- a) Anterior Face
- b) Posterior Face
What is the function of the Greater Tubercle of the Humerus?
It serves as an Attachment Site for 3 of the Rotator Cuff Muscles:
- Supraspinatus
- Infraspinatus
- Teres Minor
Where is the Lesser Tubercle located on the Humerus?
Medially to the Greater Tubercle of the Humerus
- How many Face does the Lesser Tubercle of the Humerus have?
- What are they?
- 1
2. An Anterior Face
What is the function of the Lesser Tubercle of the Humerus?
It serves as an Attachment Site for a Rotator Cuff Muscle:
Subscapularis
What separates the Greater and Lesser Tubercles of the Humerus?
The Intertubercular Sulcus (Groove)
What runs along the Intertubercular Sulcus?
The Long Head of the Biceps Brachii
What are the Edges of the Intertubercular Sulcus known as?
Lips
What attaches to the Lips of the Intertubercular Sulcus?
- Tendon of the Pectoralis Major
- Tendon of the Teres Major
- Tendon of the Latissimus Dorsi
What runs between the Greater and Lesser Tubercles, and the Shaft of the Humerus?
The Surgical Neck of the Humerus
- What important Bony Landmarks are found on the Shaft of the Humerus?
- What do these serve as?
- a) Deltoid tuberosity
- b) Radial Groove
- Attachment sites for Various Muscles
Where is the Deltoid Tuberosity located?
On the Lateral Surface of the Humeral Shaft
How is the Delotid Tuberosity described?
A Roughened Surface on the Lateral Humeral Shaft
What attaches to the Deltoid Tuberosity?
The Deltoid Muscle
What is the Radial Groove?
A Shallow Depression
Where is the Radial Groove located?
It Runs Diagonally down the Posterior Surface of the Humerus
How does the Radial Groove run, in relation to the Deltoid Tuberosity?
Parallel to it
What lies in the Radial Groove?
- Radial Nerve
2. Profunda Brachii Artery
What Muscles attach to the Humeral Shaft Anteriorly?
- Coracobrachialis
- Deltoid
- Brachialis
- Brachioradialis
What Muscles attach to the Humeral Shaft Posteriorly?
- Medial Head of the Triceps
2. Lateral Head of the Triceps
