It is a quadrilateral muscle that originates along the whole length of the hyoid bone
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What is the action of hyoglossus?

Function. The hyoglossus depresses and retracts the tongue and makes the dorsum more convex.

What is the hyoglossus muscle of the tongue?

The hyoglossus muscle is a thin, quadrilaterally shaped muscle in the upper neck and the floor of the mouth. It is one of the extrinsic muscles of the tongue. The submandibular ganglion suspended from the lingual nerve sits on it.

What happens when the hyoglossus contracts?

(2) They contract against blows to form a rigid protective wall for the viscera. (3) When the glottis is closed and the thorax and pelvis are fixed, these muscles take part in the expulsive efforts of urination, defecation, childbirth, vomiting, and of singing and coughing.

What do the hyoglossus and Palatoglossus muscles have in common?

The gluteus maximum is ____ to the gluteus medius. Which nerve would innervate muscles of the face? What do the hyoglossus and palatoglossus muscles have in common? a) They both insert into the tongue, depress the tongue, and are innervated by cranial nerve XII.

What nerve Innervates the hyoglossus muscle?

The hypoglossal nerve enables tongue movement. It controls the hyoglossus, intrinsic, genioglossus and styloglossus muscles.

What is the Sternohyoid muscle?

As for the sternohyoid muscle, it is a flat muscle located on both sides of the neck. This muscle originated from the medial edge of the clavicle bone, sternoclavicular ligament, and posterior side of the manubrium. The sternohyoid muscle then ascends the neck and attaches to the body of the hyoid bone.

What nerve does supply skin of upper lip?

The various branches of the trigeminal nerve, or cranial nerve V, provide sensory innervation to the lips. The infraorbital branch of the maxillary division of the trigeminal nerve (cranial nerve V2) supplies the upper lip.

Is hyoglossus a Suprahyoid muscle?

Some literature includes the hyoglossus muscle as part of the suprahyoid muscles; however, in most bibliographies, it is treated as an extrinsic tongue muscle, since it does not insert into any upper bone structure as do the rest of the suprahyoid muscles.

Which muscle elevates and retracts the tongue when contracting?

The longitudinal part of the styloglossus will then blend with fibers of the inferior longitudinal muscle, and the oblique part of the styloglossus muscle will blend with fibers of the hyoglossus muscles. By contracting, the styloglossus muscle retrudes/retracts the tongue and elevates its lateral aspects.

Is tongue the strongest muscle?

Many of us grew up believing the assertion that the tongue is the strongest muscle in the body. But is it really? The short answer is no.

What are the intrinsic muscles?

Based on the above definition, the intrinsic muscles refer to the muscles closest to the axial and appendicular skeleton. For example, the intrinsic muscles of the hand are those lying deeper in the hand, such as the interossei and lumbrical muscles.

What muscle is the strongest?

The strongest muscle based on its weight is the masseter. With all muscles of the jaw working together it can close the teeth with a force as great as 55 pounds (25 kilograms) on the incisors or 200 pounds (90.7 kilograms) on the molars.

Does the hyoglossus elevate the larynx?

These muscles attach to the superior aspect of the hyoid bone, and their main combined function is to elevate the hyoid and larynx and move them superiorly and anteriorly.

What does the Mylohyoid muscle do?

The mylohyoid mainly functions to elevate the hyoid bone, elevate the oral cavity, and depress the mandible. The source of motor innervation is via the mylohyoid nerve, which is a division of the inferior alveolar nerve, a branch of the mandibular division of the trigeminal nerve.

Where is the lingual artery?

The lingual artery is a branch of the external carotid artery between the superior thyroid and facial arteries. The lingual artery courses medially to the greater horn of the hyoid bone and crosses inferiorly and facially around the hypoglossal nerve.

What does the trigeminal nerve do?

The trigeminal nerve is the part of the nervous system responsible for sending pain, touch and temperature sensations from your face to your brain. It’s a large, three-part nerve in your head that provides sensation. One section called the mandibular nerve involves motor function to help you chew and swallow.

What is the main function of CN XII?

The hypoglossal nerve (CN XII) is exclusively a motor nerve carrying general somatic efferent fibers (GSE). It innervates all intrinsic and almost all extrinsic muscles of the tongue, as well as one suprahyoid muscle, the geniohyoid muscle.

What is the main function of CN XII quizlet?

CN XII is responsible for tongue movement. CN XI is responsible for neck and shoulder movement. CN IX is responsible for taste in the posterior two thirds of the tongue, pharyngeal sensation, and swallowing.

Why does my sternothyroid muscle hurt?

Causes of SCM pain can include chronic health conditions, such as asthma, and acute respiratory infections, such as sinusitis, bronchitis, pneumonia, and the flu. Other causes of SCM pain include: injuries such as whiplash or falls. overhead work such as painting, carpentry, or hanging curtains.

Does the Sternohyoid depress the larynx?

Infrahyoid muscles: Together, the infrahyoid muscles play an active role in swallowing through the movement of the larynx. The omohyoid, sternohyoid, and thyrohyoid act to depress the hyoid bone. The thyrohyoid elevates the larynx whereas the sternothyroid depress the larynx.

Are there two Sternohyoid muscles?

The sternohyoid, sternothyroid, and sternocleidomastoid muscles originate at the manubrium. The sternohyoid muscle runs from the dorsal manubrium to the ventrocaudal hyoid bone, with attachments to the sternoclavicular joint capsule, and the sternothyroid muscle attaches along the dorsal midline of the manubrium.

What is the V in your lips called?

The philtrum (Latin: philtrum from Ancient Greek φίλτρον phíltron, lit. “love charm”), or medial cleft, is a vertical indentation in the middle area of the upper lip, common to many mammals, extending in humans from the nasal septum to the tubercle of the upper lip.

What muscle moves the upper lip?

Lips and Perioral Region The upper and lower lips are comprised of the sphincteric orbicularis oris muscle, which is covered externally by skin and internally by mucosa.

What muscles elevate the upper lip?

The levator labii superioris muscle, also known as the quadratus labii, contributes to facial expression and movement of the mouth and upper lip. It courses alongside the lateral aspect of the nose, and its primary function is elevation of the upper lip.

What is the anterior belly of Digastric?

The anterior belly of the digastric is one of the three suprahyoid muscles which stabilizes the hyoid during swallowing, an action critical in protecting the airway while eating. Furthermore, the digastrics work to depress the mandible for jaw opening, chewing, and speech.

Does stylohyoid depress mandible?

Functions of the stylohyoid muscle include: elevation of the hyoid bone superiorly and posteriorly during swallowing. depression of the mandible.

What Innervates the posterior belly of Digastric?

The posterior belly of the digastric muscle is derived from the mesoderm of the second pharyngeal arch and is therefore innervated by the digastric branch of the facial nerve (cranial nerve 7).

What muscle is responsible for the flexion of the head?

The major muscle that laterally flexes and rotates the head is the sternocleidomastoid. In addition, both muscles working together are the flexors of the head.

What muscle flattens the tongue?

Hyoglossus flattens the tongue, and pulls it backwards and downwards. Here alongside hyoglossus is the third extrinsic tongue muscle, styloglossus, coming in from behind.

What is tongue retraction?

Tongue retraction. … The movement is retraction, a strong, pulling back of the tongue into the posterior portion of the oral cavity, associated with abnormal increased muscle tone. The tip of the tongue is not forward and even with the lower lip.

What is the second strongest muscle in your body?

  • Heart. The heart, which consists of cardiac muscle, is said to be the hardest working muscle in the body. …
  • Masseter. …
  • Soleus. …
  • Gluteus Maximus. …
  • Uterus.
What's the smallest muscle in the body?

Stapedius muscle is termed to be the smallest skeletal muscle in human body, which has a major role in otology. Stapedius muscle is one of the intratympanic muscles for the regulation of sound.

What is the strongest muscle in the female body?

By weight, the uterus is the strongest muscle in your body. Yes, the jaw is often listed as the winner of the strongest muscle category, but hear us out: the uterus is made up of vertical and horizontal muscle fibres that intertwine to create a mighty muscle force that can birth a baby.

What is extrinsic and intrinsic muscle?

The muscles of the hand can be subdivided into two groups: the extrinsic and intrinsic muscle groups. The extrinsic muscle groups are the long flexors and extensors. They are called extrinsic because the muscle belly is located on the forearm. The intrinsic group are the smaller muscles located within the hand itself.

What is an intrinsic back muscle?

There are three intermediate intrinsic back muscles – the iliocostalis, longissimus and spinalis. Together these muscles form a column, known as the erector spinae. The erector spinae is situated posterolaterally to spinal column, between the vertebral spinous processes and the costal angle of the ribs.

What does intrinsic and extrinsic mean in anatomy?

While intrinsic factors act from within an individual, extrinsic factors wield their influence from the outside (i.e., they are environmental, cultural, or related to lifestyle).

Is tongue a muscle?

Well, that’s only partly true: The tongue is really made up of many groups of muscles. These muscles run in different directions to carry out all the tongue’s jobs. The front part of the tongue is very flexible and can move around a lot, working with the teeth to create different types of words.

What is the longest muscle in the body?

The sartorius muscle is the longest muscle in the human body.

What's the fastest muscle in the human body?

How much do you know about eyes?

What muscles are responsible for laryngeal elevation?

Two muscle groups that suspend the hyoid, larynx, and pharynx have been proposed to elevate the hyolaryngeal complex: the suprahyoid and longitudinal pharyngeal muscles. Thought to assist both groups is the thyrohyoid, a muscle intrinsic to the hyolaryngeal complex.