12. Upper Limb I Flashcards
What are the main bony features of the Clavicle?
- Acromial End
- Sternal End
- Acromial Facet
- Conoid Tubercle
- Trapezoid Line
- Sternal Facet

What is the shape of the Clavicle Medially and Why?
Medially the Clavicle has a Convex Shape,
This allows the Brachial Plexus and Axillary Neurovascular Structures to run behind it.
Where do most Clavicle Fractures occur?
Between the Lateral 1/3 and Medial 2/3
What deformity results from a Fractured Clavicle?
Usually an obvious Bump at the site of Fracture.
What are the main bony features of the Scapula?
- Acromion/Acromial Angle
- Coracoid Process
- Glenoid Fossa
- Infraglenoid Tubercle
- Infraspinous Fossa
- Medial Border
- Lateral Border
- Inferior Angle
- Neck of Scapula
- Subscapular Fossa
- Superior Border
- Superior Angle
- Spine of Scapula
- Suprascapular Notch
- Supraspinous Fossa
How is the Scapula connected to the Skeleton?
The Scapula does not articulate directly with the Axial Skeleton.
It is connected by Muscles.
What does a Shallow Glenoid Fossa allow?
A wide range of movement of the Upper Limb.
What is the disadvantage of the
Shallow Glenoid Fossa?
It is prone to Dislocation.
It is the Most Commonly Dislocated Joint.
Where does the Tendinous Attachment
of the Short Head of Biceps arise from?
Coracoid Process of Scapula
What are the main bony features of the Humerus?
- Anatomical Neck
- Surgical Neck
- Greater Tubercle
- Lesser Tubercle
- Crest Of Greater Tubercle
- Crest Of Lesser Tubercle
- Intertubercular Sulcus
- Deltoid Tuberosity
- Radial Groove
- Radial Groove
- Medial Supracondylar Ridge
- Lateral Supracondylar Ridge
- Olecranon Fossa
- Lateral Epicondyle
- Trochlea
- Groove For Ulnar Nerve
- Medial Epicondyle
- Coronoid Fossa
- Radial Fossa
- Capitulum And Trochlea
Where is the Radial Groove found?
The Posterior Surface of the Humeral Shaft
What are the Epicondyles?
The two wing-like structures of the Distal Humerus
What is the difference between the two Epicondyles?
Why are they different?
The Medial Epicondyle is Larger,
And extends more Distally.
This is because:
The Ulnar Nerve passes through a Groove on the Posterior aspect of Medial Epicondyle.
Desribe the passage of the Ulnar Nerve down the Arm?
After arising from the Brachial Plexus,
The Ulnar Nerve descends down the Medial Aspect of the Upper Arm.
At the Elbow, it passes Posterior to the Medial Epicondyle of the Humerus,
And gives rise to an Articular Branch that supplies the Elbow Joint.
Where is the Ulnar Nerve vulnerable?
The Ulnar Nerve is palpable and vulnerable to injury at the Medial Epicondyle
What are the main bony features of the Radius?
- Head of Radius
- Neck of Radius
- Radial Tuberosity
- Shaft of Radius
- Oblique Line
What are the main bony features of the Ulna?
- Olecranon Process
- Coronoid Process
- Trochlear Notch
- Radial Notch
What is the Olecranon Process?
What Muscle attaches to it?
Projection of Bone extends Proximally forming part of Trochlear Notch.
Triceps Brachii attaches to its Superior Surface.
What is the Coronoid Process?
Ridge of Bone projects outwards Anteriorly forming part of Trochlear Notch.
Where is the Radial Notch located?
What does it Articulate with?
Located on Lateral Surface of Trochlear Notch
Articulates with the Head of the Radius.
What is the Trochlear Notch formed by?
Formed by Olecranon and Coronoid Process.
Which 3 Joints form the Shoulder Complex?
- Sternoclavicular Joint
- Acromioclavicular Joint
- Glenohumeral Joint
Which Ligaments form the Sternoclavicular Joint?
Interclavicular Ligament
Costoclavicular Ligament
Anterior Sternoclavicular Ligament
What does the Costoclavicular Ligament help attach?
Helps to attach the Clavicle securely to the First Costal Cartilage.