Upper-Limb: Osteology, Ligaments, & Joints

Question 1

Identify each of the Letters.

Which muscles attach at;

A

D

E

G

H

Answer 1

A: Acromion
-Deltoids (O)

B: Scapular Notch

C: Superior Angle

D: Coracoid Process

• Pec minor (I)
• Biceps Brachii Short head (O)
• Coracobrachialis (O)

E: Supraglenoid Tubercle
-Biceps Brachii Long head (O)

F: Glenoid Fossa

G: Infraglenoid Tubercle
-Triceps Long head (O)

H: Subscapular Fossa
-Serratus anterior attaches at medial border between C&I

I: Inferior Angle

Question 2

Identify each of the letters.

Which muscles attach at;

A

B

E

F

H

Answer 2

Anterior Humerus:

A: Lesser Tubercle
-Subscapularis (I)

B: Greater Tubercle
-Supraspinatus (I)

C: Intertubercular Groove
-Lip of IT groove; Pec Major (I)

D: Head of Humerus

E: Deltoid Tuberosity

F: Lateral Epicondyle

• Common Head of Extensors (O)
• ECRL & ECRB (O)
• Brachioradialis (O)

G: Capitulum

H: Medial Epicondyle

• Common head fo Flexors (O)
• Pronator Teres (O)

I: Trochlea

Question 3

Identify the letters

What muscles attach at;

B

E

F

H

What is the clinical significance of D & E?

Answer 3

Posterior Humerus:

A: Head of Humerus

B: Greater Tubercle

• Supraspinatus (I)
• Infraspinatus (I)
• Teres Minor (I)

C: Anatomical Neck of Humerus

D: Surgical Neck of Humerus
-Posterior Circumflex humeral a. & Axillary n. are susceptible to damage if a fracture occurs ere

E: Radial Groove

• Radial n. & Deep arter of the arm travel in this groove and are susceptible to damage with a Mid-shaft fracture
• Adjactent Triceps Brachii Lateral Head (O)

F: Medial Epicondyle
-Common head of Flexors

G: Olecranon Fossa

H: Lateral Epicondyle

• Common Head of Extensors (O)
• ECRL & ECRB (O)
• Brachioradialis (O)
• Anconeus (O)

I: Trochlea

Question 4

What are the (3) Ligaments at the elbow joint?

What are their roles?

Answer 4

Question 5

What are the bursae of the Elbow?

What do they protect?

Answer 5

Several Bursae around the Elbow joint.

Olecranon Bursae:

• Protects the triceps brachii (tendon) & Olecranon process.