What are strap muscles in the neck?

What are strap muscles in the neck?

The infrahyoid muscles or strap muscles are a group of four paired muscles in the anterior neck below the hyoid bone, within the muscular triangle. They are responsible for depressing the hyoid during swallowing. These muscles can be remembered by the mnemonic “TOSS”.

What nerve Innervates the Infrahyoid?

Ansa Cervicalis. The ansa cervicalis (or ansa hypoglossi) is the union of the C1, C2, and C3 nerves from the cervical plexus, which provides innervation to the infrahyoid muscles (Figure 31.2).

What Innervates the Thyrohyoid muscle?

The thyrohyoid muscles are innervated by a branch of the ventral ramus of C1 from the cervical plexus, which courses with the hypoglossal nerve. The nerve fibers are thus not from the hypoglossal nucleus.

What strap muscles overlie thyroid gland?

The thyrohyoid is a short band of muscle, thought to be a continuation of the sternothyroid muscle. Attachments: Arises from the thyroid cartilage of the larynx, and ascends to attach to the hyoid bone.

Which are the strap muscles?

The infrahyoid muscles, or strap muscles, are a group of four pairs of muscles in the anterior (frontal) part of the neck. The four infrahyoid muscles are the sternohyoid, sternothyroid, thyrohyoid and omohyoid muscles.

Is the Sternocleidomastoid a strap muscle?

The sternocleidomastoid and the outer layer of strap muscles. thyroid cartilage cricoid cartilage Page 3 rior to the angle of the mandible to the sternum (i.e. from your skull to your breastbone).

What nerve Innervates Geniohyoid?

The hypoglossal nerve innervates the geniohyoid (GH) muscle, the intrinsic muscles of the tongue, and the extrinsic muscles of the tongue, i.e., the genioglossus muscle (medial branch), the styloglossus (SG), and hyoglossus (HG) muscles (lateral branch) (Fig.

What is the Hyoglossus muscle?

The hyoglossus muscle is one of the four intrinsic muscles of the tongue. It is a quadrilateral muscle that originates along the whole length of the hyoid bone and inserts into the side of the tongue. The hyoglossus acts to both depress and retract the tongue.

What is the origin of the sternocleidomastoid?

Sternocleidomastoid Attachments It originates on the anterior surface of the manubrium, and the superior border and anterior surface of the medial third of the clavicle. The SCM converges into one point and inserts on the lateral surface of the mastoid process and the nuchal line of the occipital bone.

Why are these muscles called strap muscles?

The name “strap muscles” comes from their long and flat shape, similar to a belt or strap 3.