Humerus (Upper Arm Bone): Parts, Landmarks & Clinical Notes | Clinical Anatomy скачать в хорошем качестве

Humerus (Upper Arm Bone): Parts, Landmarks & Clinical Notes | Clinical Anatomy

Content: 00:00 Introduction & Content 00:37 Humerus Anatomy 00:58 Proximal Humerus 04:40 Surgical Neck Clinical Note 06:02 Shaft of Humerus, Landmarks & Clinical Points 07:37 Distal Humerus Structures 10:40 Summary and Next Topic ------------------ 🫀Help me make more free educational content:    / @taimtalksmed   📲Other Links: Website: https://taimtalksmed.com/ Instagram:   / taimtalksmed   Discord:   / discord   ------------------- Humerus Anatomy: Landmarks, Surfaces & Clinical Notes | Upper Arm Bone This video covers the detailed anatomy of the humerus, the long bone of the upper arm, which connects the shoulder joint (glenohumeral joint) to the elbow joint. We explore its proximal, shaft, and distal parts — including all muscle insertions, surface landmarks, clinical relevance, and articulations. Major Sections of the Humerus: • Proximal end – Participates in the shoulder joint • Shaft (Body) – Attachment point for major arm muscles • Distal end – Forms the upper half of the elbow joint Proximal Humerus Structures: • Head of humerus (Caput humeri) – Articulates with glenoid cavity • Anatomical neck (Collum anatomicum) – Separates the head from tubercles • Greater tubercle (Tuberculum majus) – Insertion for supraspinatus, infraspinatus, teres minor • Lesser tubercle (Tuberculum minus) – Insertion for subscapularis • Intertubercular sulcus (Sulcus intertubercularis) – Pathway for long head of biceps brachii tendon • Crest of greater tubercle (Crista tuberculi majoris) – Insertion of pectoralis major • Crest of lesser tubercle (Crista tuberculi minoris) – Insertion of teres major • Floor of sulcus – Insertion of latissimus dorsi • Surgical neck (Collum chirurgicum) – Common fracture site; surrounds axillary nerve and circumflex humeral arteries • Deltoid tuberosity (Tuberositas deltoidea) – Insertion of deltoid muscle Shaft of Humerus – Landmarks & Clinical Points: • Radial (spiral) groove (Sulcus nervi radialis) – Contains radial nerve and deep brachial artery • Radial nerve injury – Wrist drop in midshaft fractures • Nutrient foramen (Foramen nutricium) – Entry point for nutrient artery • Surfaces:  • Anterolateral surface (Facies anterolateralis)  • Anteromedial surface (Facies anteromedialis)  • Posterior surface (Facies posterior) • Borders:  • Medial border (Margo medialis)  • Lateral border (Margo lateralis) Distal Humerus Structures: • Medial epicondyle (Epicondylus medialis) – Origin for forearm flexors • Medial supracondylar ridge (Crista supracondylaris medialis) – Muscle and fascia attachment • Groove for ulnar nerve (Sulcus nervi ulnaris) – “Funny bone” site; vulnerable to trauma • Lateral epicondyle (Epicondylus lateralis) – Origin for forearm extensors • Lateral supracondylar ridge (Crista supracondylaris lateralis) – Attachment for brachioradialis, extensor carpi radialis longus Articular Surfaces & Fossae: • Coronoid fossa (Fossa coronoidea) – Receives coronoid process of ulna during flexion • Radial fossa (Fossa radialis) – Receives head of radius during flexion • Olecranon fossa (Fossa olecrani) – Receives olecranon during extension • Trochlea (Trochlea humeri) – Articulates with ulna (hinge joint) • Capitulum (Capitulum humeri) – Articulates with head of radius Muscles Mentioned & Insertions: • Supraspinatus, Infraspinatus, Teres Minor – Greater tubercle • Subscapularis – Lesser tubercle • Pectoralis Major – Crest of greater tubercle • Teres Major – Crest of lesser tubercle • Latissimus Dorsi – Floor of bicipital groove • Deltoid – Deltoid tuberosity • Triceps Brachii (lateral/medial heads) – Near radial groove • Brachioradialis – Lateral supracondylar ridge • Extensor carpi radialis longus – Lateral supracondylar ridge • Forearm flexor group – Medial epicondyle • Forearm extensor group – Lateral epicondyle Clinical Concepts Covered: • Surgical neck fractures • Axillary nerve injury • Radial nerve palsy (wrist drop) • Midshaft humerus fractures • Ulnar nerve entrapment at medial epicondyle • Lateral epicondylitis (Tennis elbow) • Medial epicondylitis (Golfer’s elbow) • Elbow joint mechanics (flexion, extension, radial articulation) Elbow Joint Articulations (briefly shown): • Trochlea → Ulna • Capitulum → Radius • Coronoid fossa → Coronoid process (ulna) • Radial fossa → Head of radius • Olecranon fossa → Olecranon (ulna) Sources: • Kozlowski, T. (2017). Memorix Anatomy, 2nd ed. • Standring S. (2020). Gray’s Anatomy, 42nd edition • Tubbs RS, Shoja MM, Loukas M. (2016). Bergman’s Encyclopedia of Human Anatomic Variation • White TD, Folkens PA. (2005). The Human Bone Manual Programs used: Complete Anatomy, Biorender, PowerPoint