ANATOMY

Sternohyoid Muscle is the muscle attaching the Hyoid Bone to the Sternum. It is one of the paired Strap Muscles of Infrahyoid group (four muscles in anterior of Neck) that helps in depressing the Hyoid Bone. The Muscle originates from the following regions.

• Medial end of Clavicle

• Posterior Sternoclavicular Ligament (band of fibers)

• Upper part of Manubrium Sterni

The muscle while passing upward medially inserts in the lower body of the Hyoid Bone by short Tendinous fibers. Sometimes it also presents a Transverse Tendinous inscription right after its origin.

INNERVATIONS

C1-C3 branch of the Ansa Cervicalis innervates Sternohyoid Muscle.

BLOOD SUPPLY

The nutrient and blood supply to Sternohyoid muscle is provided by Superior Thyroid Artery.

FUNCTIONS

Due to its location Sternohyoid Muscle is useful for several functions which are as follows.

• Hyoid bone depression

• Head and neck movements

• Speech

It is responsible for helping the Hyoid Bone its functions

CLINICAL SIGNIFICANCE

Conditions that affect Omohyoid Muscles are as follows.

• Injury due to overuse

• Tears

• Strain

• Contusions

• Myopathy (inherited or acquired disease of muscle)

• Atrophy

• Infectious myositis

Above conditions can result into following symptoms.

• Throat pain

• Difficulty in swallowing

• Difficulty in talking

• Fever

• Swelling

• Muscle spasm