PQ1 – Shoulder Anatomy & Muscles | 2025/2026 | 70+ Verified Exam Questions on Origins, Insertions, Actions & Nerve Supply

This high-yield resource contains over 70 graded and verified exam questions and answers from the PQ1 section of the 2025/2026 anatomy curriculum at a U.S. medical school. Structured for maximum clarity, the document comprehensively covers the anatomy of the shoulder and upper back, including detailed muscle charts with origins, insertions, actions, and innervations. It integrates clinical correlations and functional testing, making it ideal for both memorization and application in practical exams. Main topics include: Detailed breakdowns of key muscles: deltoid (anterior, posterior, medial), rotator cuff (SITS), trapezius, latissimus dorsi, pectoralis major, subscapularis, infraspinatus, teres major/minor Bone and joint anatomy: scapula, clavicle, humerus, glenohumeral and acromioclavicular joints Nerve supply: axillary, suprascapular, dorsal scapular nerves; brachial plexus structure Clinical conditions and tests: rotator cuff testing (drop arm, empty can), axillary nerve injury, keratoses types (seborrheic vs actinic) Arterial supply: scapular anastomosis, key vessel names and paths Bonus section: overview of fertilization steps relevant to reproductive physiology Who should use this document: Medical students in anatomy, MSK, or clinical integration blocks Pre-PA, physiotherapy, chiropractic, or kinesiology students studying musculoskeletal systems Students preparing for NBME Anatomy, USMLE Step 1, COMLEX, or lab-based practicals Tutors and anatomy educators needing clear, structured Q&A content for teaching or review The content is concise, practical, and visually oriented—perfect for fast-paced learning, clinical prep, and long-term retention. Keywords: shoulder anatomy, deltoid muscle, rotator cuff, supraspinatus, infraspinatus, subscapularis, teres minor, axillary nerve, shoulder joints, glenohumeral joint, scapula landmarks, clavicle, humerus, muscle origin, muscle insertion, muscle action, nerve innervation, brachial plexus, axillary nerve injury, serratus anterior, scapular anastomosis, keratosis, actinic keratosis, seborrheic keratosis, shoulder ligaments, quadrangular space, muscle tests, orthopedic exam