200-Level Anatomy: Upper Limb High-Yield Review
Prepared by: [Lasisi Enoch]
Target: Exam Success & Clinical Relevance
1. The Brachial Plexus (The “Map” of the Arm)
Most students fail here. Learn the “MARMU” mnemonic for terminal branches.
Structure Roots Key Clinical Fact
Musculocutaneous C5-C7 Supplies the "Biceps"—Damage = loss of forearm flexion.
Axillary C5-C6 Wraps surgical neck of humerus—Damage = "Flat shoulder."
Radial C5-T1 The "Great Extensor"—Damage = Wrist Drop.
Median C5-T1 The "Laborer’s Nerve"—Involved in Carpal Tunnel.
Ulnar C8-T1 The "Musician's Nerve"—Damage = Claw Hand.
Pro-Tip: If a question mentions a "Mid-shaft humerus fracture," think Radial Nerve
immediately.
2. Muscles of the Rotator Cuff (SITS)
Remember "SITS" to keep the shoulder in its socket.
1. Supraspinatus (Initial abduction 0-15°)
2. Infraspinatus (Lateral rotation)
3. Teres Minor (Lateral rotation)
4. Subscapularis (Medial rotation)
3. The Cubital Fossa (The "Elbow Pit")
Boundaries:
• Superior: Imaginary line between epicondyles.
• Medial: Pronator teres.
• Lateral: Brachioradialis.
Contents (Medial to Lateral) - Mnemonic: "My Bottoms Be Red"
1. Median Nerve
2. Brachial Artery
3. Biceps Brachii Tendon
4. Radial Nerve
Prepared by: [Lasisi Enoch]
Target: Exam Success & Clinical Relevance
1. The Brachial Plexus (The “Map” of the Arm)
Most students fail here. Learn the “MARMU” mnemonic for terminal branches.
Structure Roots Key Clinical Fact
Musculocutaneous C5-C7 Supplies the "Biceps"—Damage = loss of forearm flexion.
Axillary C5-C6 Wraps surgical neck of humerus—Damage = "Flat shoulder."
Radial C5-T1 The "Great Extensor"—Damage = Wrist Drop.
Median C5-T1 The "Laborer’s Nerve"—Involved in Carpal Tunnel.
Ulnar C8-T1 The "Musician's Nerve"—Damage = Claw Hand.
Pro-Tip: If a question mentions a "Mid-shaft humerus fracture," think Radial Nerve
immediately.
2. Muscles of the Rotator Cuff (SITS)
Remember "SITS" to keep the shoulder in its socket.
1. Supraspinatus (Initial abduction 0-15°)
2. Infraspinatus (Lateral rotation)
3. Teres Minor (Lateral rotation)
4. Subscapularis (Medial rotation)
3. The Cubital Fossa (The "Elbow Pit")
Boundaries:
• Superior: Imaginary line between epicondyles.
• Medial: Pronator teres.
• Lateral: Brachioradialis.
Contents (Medial to Lateral) - Mnemonic: "My Bottoms Be Red"
1. Median Nerve
2. Brachial Artery
3. Biceps Brachii Tendon
4. Radial Nerve
