Hyoid Muscles (Suprahyoid & Infrahyoid Muscles Animation) Dr G Bhanu Prakash

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Suprahyoid & Infrahyoid Muscles Animation – Actions & Nerve Supply | Dr G Bhanu Prakash

In this animated and high-yield anatomy video, Dr G Bhanu Prakash clearly explains the suprahyoid and infrahyoid muscles of the neck — focusing on their location, actions, and nerve supply, all beautifully visualized for easier understanding. These muscle groups play essential roles in swallowing, speaking, and stabilizing the hyoid bone and larynx, and are frequently tested in MBBS anatomy, clinical exams, and even surgical practice. 🧠🎯

The suprahyoid muscles (above the hyoid bone) include:
– Mylohyoid – elevates the floor of the mouth (nerve to mylohyoid from CN V3)
– Geniohyoid – pulls hyoid anterosuperiorly (C1 via hypoglossal nerve)
– Stylohyoid – elevates and retracts the hyoid (CN VII – facial nerve)
– Digastric (anterior and posterior bellies) – depresses mandible, elevates hyoid
– Anterior belly: nerve to mylohyoid (CN V3)
– Posterior belly: CN VII (facial nerve)

The infrahyoid muscles (below the hyoid bone), often called “strap muscles,” include:
– Sternohyoid, Sternothyroid, Omohyoid, and Thyrohyoid
– Most are innervated by the ansa cervicalis (C1–C3)
– Thyrohyoid is uniquely innervated by C1 via hypoglossal nerve

You’ll also learn how these muscles work together during:
– Swallowing (deglutition)
– Speech
– Stabilization of the larynx and trachea

This animation simplifies the anatomical planes and clearly shows muscle origins, insertions, and clinical correlations, such as how damage to the facial nerve or ansa cervicalis can affect swallowing or speech. Perfect for MBBS anatomy exams, NEET PG, USMLE Step 1, and clinical oral viva preparation.

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