Category: Human Anatomy

QUICK REVISION NOTES 📌 MOUTH (ORAL CAVITY) The mouth is the first part of the digestive system, playing a vital role in ingestion, mastication, taste, and speech. 1. Boundaries of Oral Cavity Roof: Hard and soft palate Floor: Tongue and mucosa covering mylohyoid muscle Anterior/Lateral: Lips and cheeks Posterior: Opens into oropharynx (via oropharyngeal isthmus)

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TOPIC: ANATOMY OF LARYNX 📌 INTRODUCTION:  🔹The larynx is the voice box – a short, tubular structure involved in phonation, breathing, and protection of lower airways. 🔹Extends from C3 to C6 vertebrae. 🔹Located in the anterior neck, continuous above with the laryngopharynx and below with the trachea. 1. CARTILAGES OF THE LARYNX A. Unpaired Cartilages […]

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TOPIC: ANATOMY OF TONGUE 📌INTRODUCTION:  The tongue is a muscular organ in the oral cavity, essential for taste, speech, mastication, deglutition, and oral hygiene. Divided anatomically and developmentally into anterior 2/3 and posterior 1/3.

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TOPIC: NERVE SUPPLY OF HEAD & NECK 📌OVERVIEW 👉 The head and neck region receives motor, sensory, and autonomic innervation from: 12 Cranial nerves (CN I–XII) Cervical spinal nerves (C1–C4) – from cervical plexus Sympathetic chain – cervical part 1️⃣ CRANIAL NERVES INVOLVED A. Sensory Supply Trigeminal nerve (CN V) – main sensory nerve of […]

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TOPIC: EMBRYOLOGY – Concise Notes 📌 INTRODUCTION 🔺Embryology is the study of prenatal development – from fertilization to birth. 🔺Divided into: General Embryology – early development (fertilization to trilaminar germ disc) Systemic Embryology – development of organ systems Head & Neck Embryology – especially important for dental students (pharyngeal arches, face, palate, teeth)

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TOPIC: VENOUS AND LYMPHATIC SUPPLY OF HEAD & NECK 🔍 VENOUS DRAINAGE OF HEAD & NECK 1. Overview 🔹Veins are valveless, interconnected, and accompany arteries. 🔹Classified into: Superficial veins (e.g., facial, retromandibular) Deep veins (e.g., internal jugular vein) 2. Major Veins A. External Jugular Vein (EJV): 🔹Formed by: Posterior auricular vein + Retromandibular vein (posterior […]

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TOPIC: MUSCLES OF HEAD AND NECK – Concise Notes 📌 INTRODUCTION 🔹The muscles of the head and neck perform crucial roles: facial expression, mastication, speech, swallowing, and neck movements. 🔹Classified based on location and function. 🔍 MUSCLES OF FACIAL EXPRESSION Supplied by Facial Nerve (CN VII) Located in subcutaneous tissue – insert into skin, not […]

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TOPIC: TRIANGLES OF THE NECK – Concise Notes 📌 INTRODUCTION 🔺The neck is divided into triangles for anatomical understanding and surgical reference. 🔺Two main triangles: Anterior triangle Posterior triangle 1. POSTERIOR TRIANGLE ➡️ Boundaries Anterior: Posterior border of sternocleidomastoid (SCM) Posterior: Anterior border of trapezius

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TRIGEMINAL & FACIAL NERVE – Concise Lecture Notes TOPIC: TRIGEMINAL & FACIAL NERVE I. TRIGEMINAL NERVE (CN V) 👉 Type: Mixed nerve (Motor + Sensory) 👉 Largest cranial nerve; Principal sensory nerve of face 1. ORIGIN Four nuclei in the pons: 1 Motor nucleus (pons) 3 Sensory nuclei (mesencephalic, main sensory, spinal) 2. DIVISIONS 👉 […]

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