Lastly we’ll take a brief look at the attachments of the three muscles that pull the hyoid bone downwards. They’re the omohyoid

What muscles are attached to the hyoid bone?

• Superior. Middle pharyngeal constrictor muscle. Hyoglossus muscle. Genioglossus. Intrinsic muscles of the tongue. Suprahyoid muscles. Digastric muscle. Stylohyoid muscle. Geniohyoid muscle. Mylohyoid muscle.
• Inferior. Thyrohyoid muscle. Omohyoid muscle. Sternohyoid muscle.

How many bones are in the hyoid?

The posterior surface of the body is concave superoinferiorly and laterally and usually pierced by several vascular foramina. Parsons (1909) reported the ranges and means of the dimensions of the body of 81 adult hyoid bones. Figure 5-71. Adult hyoid: (A) anterior; (B) lateral.

How many hyoid muscles are there?

Key points. There are eight hyoid muscles, four suprahyoid and four infrahyoid muscles. The suprahyoid muscles include digastric, stylohyoid, mylohyoid and geniohyoid. The infrahyoid muscles include omohyoid, sternohyoid, sternothyroid and thyrohyoid.

What two muscles of the pig are inserted on the hyoid bone?

The stylohyoid, posterior digastric, and mylohyoid muscles constitute the first group of muscles that shorten in the initial stage of swallowing and are instrumental in moving the hyoid bone upward.

Which muscles depress the hyoid?

More specifically, all infrahyoid muscles (except the sternothyroid) depress the hyoid. The sternothyroid depresses the larynx whereas the thyrohyoid elevates it (when the hyoid bone is fixed).

What connects the hyoid bone to the larynx?

Hyoepiglottic ligament – connects the hyoid bone to the anterior aspect of the epiglottis.

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.

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.

Which of the following muscles runs between the larynx and the hyoid bone?

The thyrohyoideus is a flat rectangular muscle attached to the lateral surface of the thyroid cartilage lamina that inserts on the caudal part of the thyrohyoid bone. It is innervated by the hypoglossal nerve and moves the hyoid bone caudally or the larynx rostrally and dorsally.

Article first time published on

Is the hyoid bone the Adam's apple?

The hyoid bone (top yellow) is connected to the tongue and jaw muscles above and the thyroid cartilage below. The thyroid cartilage (central blue) is also known as the Adams Apple and protects the vocal cords which are attached on the backside in the middle.

Can you touch your hyoid bone?

The hyoid bone is a slender, U-shaped bone. It’s suspended just beneath the mandible. It isn’t directly attached to any other bone. You can feel your own hyoid bone here, and you can move it from side to side.

Do females have a hyoid bone?

A total of 100 hyoid bones, 66 males and 34 females, in different age groups were studied. According to the study, hyoid bones were highly polymorphic in shape across the ages in both sexes. In adult males, V shape is more common (36.16 %) when compared to U shaped hyoid bone (35.29%) in adult females.

Does the pectoralis major attach to the scapula?

The pectoralis major extends across the upper part of the chest and is attached to a ridge at the rear of the humerus (the bone of the upper arm). … The pectoralis minor lies, for the most part, beneath the pectoralis major, arising from the middle ribs and inserting into (attaching to) the scapula (shoulder blade).

What type of bone is the hyoid?

The hyoid bone is a small horseshoe-shaped bone located between the mandible and the shoulder girdle. It is classified as a sesamoid bone which means it is a freely floating bone.

What does SCM muscle do?

Function. The function of this muscle is to rotate the head to the opposite side or obliquely rotate the head. It also flexes the neck. When both sides of the muscle act together, it flexes the neck and extends the head.

What bone in the human body is not connected to another?

Famously, the hyoid bone is the only bone in humans that does not articulate with any other bone, but only has muscular, ligamentous, and cartilaginous attachments.

Why is my hyoid bone clicking?

Clicking hyoid is an abnormal condition of hyoid bone which is characterized by enlargement of greater cornua of hyoid bone. These enlarged cornua impinge on cervical vertebrae. This impingement of cervical vertebrae produces interosseus friction.

What does depressing the hyoid do?

This group of muscles contains four main muscles: the omohyoid muscle, the sternohyoid muscle, the sternothyroid muscle, and the thyrohyoid muscle. The primary function of this group of muscles is to depress the hyoid bone during speech and swallowing.

What is the Sternocleidomastoid attach to?

OriginInsertionSuperior border/anterior surface of medial third of clavicleNuchal line of occipital bone

Which muscle runs from the hyoid to the superior border of the scapula and is mostly inaccessible?

Omohyoid muscle The inferior belly continues from the intermediate in a horizontal direction to insert in the transverse scapular ligament and the superior border of the scapula.

How many strap muscles are there?

Gross anatomy There are four strap muscles: thyrohyoid: deep and lateral. omohyoid: superficial and lateral. sternohyoid: superficial and medial.

What is the longest strap muscle?

Anatomical terms of muscle The sartorius muscle (/sɑːrˈtɔːriəs/) is the longest muscle in the human body. It is a long, thin, superficial muscle that runs down the length of the thigh in the anterior compartment.

Is the Sartorius a strap muscle?

The sartorius muscle (SM) is a long strap muscle originating from the anterior superior iliac spine and inserting onto the medial surface of the proximal tibia. It crosses the anterior compartment of the thigh obliquely and descends towards the medial aspect of the knee.

Which Infrahyoid muscle attaches to the scapula and the hyoid?

MuscleInferior AttachmentSuperior AttachmentOmohyoidSuperior border of the scapula, near scapular notchHyoid boneSternohyoidManubrium of the sternum and the medial clavicleHyoid boneSternothyroidManubrium of the sternumThyroid cartilageThyrohyoidThyroid cartilageHyoid bone

Where are the hyoid muscles located?

MuscleGeniohyoidOriginInferior mental spine of Symphysis mentiInsertionHyoidInnervationCervical Spinal Nerve 1 via the hypoglossal nerve (CN XII)

How do I remember my hyoid muscles?

1. C: constrictor muscle (middle pharyngeal)
2. H: hyoglossus muscle.
3. D: digastric muscle (intermediate tendon)
4. S: stylohyoid muscle.
5. G: geniohyoid muscle.
6. M: mylohyoid muscle.
7. T: thyrohyoid muscle.
8. O: omohyoid muscle.

What muscles open the airway?

We conclude that the posterior cricoarytenoid opens the laryngeal airway. The cricothyroid together with the posterior cricoarytenoid accentuates this opening. The larynx is also opened by the geniohyoid, mylohyoid, sternothyroid, and middle constrictor.

What muscle attaches to both the thyroid cartilage of the larynx and to the hyoid bone?

The thyrohyoid muscle inserts on the thyroid cartilage and the body of the hyoid bone. The receives innervation from the first cervical nerve, along with the hypoglossal nerve. Its primary function is to depress the hyoid bone thus elevating the larynx.

Are the vocal cords muscles?

The vocal cords (also called vocal folds) are two bands of smooth muscle tissue found in the larynx (voice box). The vocal cords vibrate and air passes through the cords from the lungs to produce the sound of your voice.

Why do females not have Adam's apples?

During puberty, boys develop a larger larynx. This makes their voices deeper over time, and it can create the bump at the front of the throat that’s known as an Adam’s apple. … The degree of laryngeal growth in females isn’t as significant as in males, so most women don’t have Adam’s apples.