Human Anatomy

Suboccipital Triangle: Overview, Boundries & Contents

suboccipital triangle contents

The suboccipital triangle is placed at the back of the junction between head and neck, bounded by the three muscles of the suboccipital muscles: Obliquus capitis superior - above and laterally Rectus capitis posterior major - above and medially Obliquus...

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Posterior Scalene: Origin, Insertion, Action & Nerve Supply

Posterior Scalene

Posterior Scalene: The posterior scalene is the smallest and deepest of the scalene muscles. It is deeply placed, lying behind Sternocleidomastoid. Unlike the anterior and middle scalene muscles, it inserts into the second rib. Origin: Originates from the posterior tubercles...

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Anterior Scalene: Origin, Insertion, Action & Nerve Supply

Anterior Scalene

Anterior Scalene:The anterior scalene muscle is one of the lateral muscles of the neck, deep to the prominent sternocleidomastoid muscle. Origin: Anterior Scalene originates from the anterior tubercles of the transverse processes of C3-C6. Insertion: Anterior Scalene inserts into the...

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Thyrohyoid: Origin, Insertion, Action & Nerve Supply

Thyrohyoid Muscles

Thyrohyoid:The thyrohyoid is a short band of muscle, thought to be a continuation of the sternothyroid muscle, which depresses the hyoid and elevates the larynx. Origin: oblique line of the thyroid cartilage Insertion: lower border of the hyoid bone Actions:...

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Sternothyroid: Origin, Insertion, Action & Nerve Supply

Sternothyroid Muscles

Sternothyroid:The sternothyroid is a muscle in the neck.The sternothyroid muscle is wider and deeper than the sternohyoid. It is located within the deep plane. Origin: Posterior surface of the manubrium below the origin of the sternohyoid m. Insertion: Arises from...

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Sternohyoid: Origin, Insertion, Action & Nerve Supply

Sternohyoid Muscles

Sternohyoid: The sternohyoid muscle is located within the superficial plane. Origin: Posterior surface of manubrium and an adjoining part of the clavicle, and posterior sternoclavicular ligament. Insertion: lower border of the hyoid bone, medial to the omohyoid m. insertion. Actions: Depresses...

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Omohyoid: Origin, Insertion, Action & Nerve Supply

Omohyoid Muscles

Omohyoid: The omohyoid is comprised of two muscle bellies, which are connected by a muscular tendon. Origin: Inferior belly: upper border of the scapula medial to the scapular notch. Superior belly: intermediate tendon. It runs superomedially underneath the sternocleidomastoid muscle....

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Geniohyoid: Origin, Insertion, Action & Nerve Supply

Geniohyoid muscle

Geniohyoid: The geniohyoid muscle is a thin muscle located superior to the medial border of the mylohyoid muscle. Origin: The geniohyoid muscle originates from the inferior mental spine of the mandible Insertion: Then geniohyoid muscle travels inferiorly and posteriorly to...

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