Tongue Muscles: Their Role And Function Explained

The tongue is a muscular organ situated in the oral cavity, and it is entirely made up of muscle. The tongue is made up of 8 muscles, which are classified as either intrinsic or extrinsic. The four intrinsic muscles are not attached to bone and change the shape of the tongue. The four extrinsic muscles are anchored to bone and change the position of the tongue. The genioglossus muscle, for example, is a large, thick muscle that protrudes the tongue and is also known as the tongue's safety muscle. The tongue's position can influence the whole body, for example, when placed against the palate, the parasympathetic system reduces its activity.

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The genioglossus muscle is a large, thick muscle that sticks the tongue out

The tongue is a muscular organ situated in the oral cavity, and it is made up of eight muscles that combine to form a flexible matrix. These muscles are classified as either intrinsic or extrinsic. The intrinsic muscles are not attached to bone, and they alter the shape of the tongue. The extrinsic muscles, on the other hand, are anchored to bone and change the position of the tongue.

The genioglossus muscle is one of the four extrinsic muscles of the tongue. It is a large, thick muscle that contributes significantly to the shape of the tongue. The genioglossus arises from the mandible and is attached to the body of the hyoid bone and the entire length of the tongue. Its main function is protrusion, or 'sticking the tongue out', and depression of the tongue. It is also known as the tongue's "safety muscle" as it is the only muscle that propels the tongue forward.

The sublingual artery branches at the anterior border of the hyoglossus muscle and passes between the genioglossus muscle and mylohyoid muscle to the sublingual gland. The deep lingual artery, a termination of the lingual artery, passes between the genioglossus muscle and the inferior longitudinal muscle, supplying the apex of the tongue.

The genioglossus muscle is innervated by the hypoglossal nerve (CN XII), which provides motor innervation to all of the intrinsic and extrinsic muscles of the tongue except for the palatoglossus muscle, which is innervated by the vagus nerve (CN X). The blood supply to the tongue comes predominantly from the lingual artery, a branch of the external carotid artery.

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The hyoglossus muscle is located in the floor of the oral cavity and retracts and depresses the tongue

The tongue is a muscular organ situated in the oral cavity, and it has several functions, including tasting, chewing, swallowing, speaking, and clearing the oral cavity. The tongue is separated medially into two halves by a connective septum, the lingual septum.

The hyoglossus muscle is located in the floor of the oral cavity and plays a key role in depressing and retracting the tongue. The hyoid bone gives rise to this thin, quadrilateral extrinsic muscle, which inserts into the tongue's side. The hypoglossal nerve (cranial nerve XII) innervates the hyoglossus muscle.

The hyoglossus muscle is one of four intrinsic muscles of the tongue. It is also one of the extrinsic muscles of the tongue, which originate from structures outside the tongue and insert into it. The other extrinsic muscles are the genioglossus, styloglossus, and palatoglossus muscles.

The hyoglossus muscle's main function is to depress and retract the tongue. It also makes the dorsum more convex. Tongue retraction and downward compression of the lower third of the tongue by the hyoglossus muscle are essential during normal physiological swallowing as they aid bolus propulsion. Tongue movement control also plays a role in speech articulation.

The hyoglossus muscle receives its blood supply from the lingual artery, which is the third branch of the external carotid artery. The dorsal lingual artery, a branch of the lingual artery, supplies the mucous membrane of the tongue's posterior dorsum region. The sublingual branch of the lingual artery primarily supplies the hyoglossus muscle, with additional supply from the submental branch of the facial artery.

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The styloglossus muscle is a thin, paired muscle that retracts and elevates the tongue

The tongue is a muscular organ situated in the oral cavity, with rich motor and sensory innervation. It has both intrinsic and extrinsic muscles. The intrinsic muscles of the tongue are involved primarily in changing its shape, which is essential for speaking. The extrinsic muscles, on the other hand, originate from structures outside the tongue and insert into it, altering its position.

The styloglossus muscle is one of the four pairs of extrinsic muscles of the tongue. It is a thin, bilaterally paired muscle that originates at the styloid process of the temporal bone and inserts onto the side of the tongue. The styloglossus is more lateral than the other tongue muscles. Its contraction results in retrusion of the tongue, and it also elevates the tongue's lateral margin.

The styloglossus muscle is the shortest and smallest of the three styloid muscles. It arises from the anterior and lateral surfaces of the styloid process of the temporal bone near its apex, and from the stylomandibular ligament. It passes anterioinferiorly from its origin to its insertion between the internal carotid artery and the external carotid artery, and between the superior pharyngeal constrictor muscle and the middle pharyngeal constrictor muscle. It divides upon the side of the tongue near the dorsal surface of the tongue, blending with the fibers of the longitudinalis inferior muscle anterior to the hyoglossus muscle.

The styloglossus muscle is innervated by the hypoglossal nerve (cranial nerve XII), which innervates all the muscles responsible for tongue movement. The styloglossus draws up the sides of the tongue to create a trough for swallowing. Acting bilaterally, with both styloglossus muscles contracting simultaneously, they aid in retracting the tongue.

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The four intrinsic muscles alter the shape of the tongue and are not attached to bone

The tongue is a muscular organ situated in the oral cavity, and it is an accessory digestive organ. Its main functions include tasting, chewing, swallowing, speaking, and clearing the oral cavity. The tongue is a muscular hydrostat that forms part of the floor of the oral cavity. The left and right sides of the tongue are separated by a vertical section of fibrous tissue known as the lingual septum. The tongue is an entirely muscular organ. Its rich motor and sensory innervation is carried by four cranial nerves.

The four intrinsic muscles of the tongue are not attached to bone. They originate and attach to other structures within the tongue. These muscles alter the shape of the tongue by lengthening and shortening it, curling and uncurling its apex and edges, and flattening and rounding its surface. This provides shape and helps facilitate speech, swallowing, and eating. The four intrinsic muscles are:

• Superior longitudinal muscle: This muscle runs along the upper surface of the tongue under the mucous membrane and functions to shorten and curl the tongue upward. It originates near the epiglottis, at the hyoid bone, from the median fibrous septum.
• Inferior longitudinal muscle: This muscle lines the sides of the tongue and is joined to the styloglossus muscle. It functions to shorten and curl the tongue downward.
• Vertical muscle: This muscle is located in the middle of the tongue and joins the superior and inferior longitudinal muscles. It functions to flatten the tongue.
• Transverse muscle: This muscle divides the tongue in the middle and is attached to the mucous membranes that run along the sides. It functions to lengthen and narrow the tongue.

The four extrinsic muscles of the tongue, on the other hand, are anchored to bone and change the position of the tongue. They are the genioglossus, the hyoglossus, the styloglossus, and the palatoglossus.

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The four extrinsic muscles change the position of the tongue and are anchored to bone

The tongue is a muscular organ situated in the oral cavity, with eight muscles that combine to form a flexible matrix. The tongue has two groups of muscles: the intrinsic and extrinsic muscles. The four intrinsic muscles are responsible for altering the shape of the tongue and are not attached to any bone. On the other hand, the four extrinsic muscles change the position of the tongue and are anchored to bone. These four extrinsic muscles are the genioglossus, hyoglossus, styloglossus, and palatoglossus.

The genioglossus muscle is a large, thick muscle that significantly contributes to the tongue's shape. It arises from the mandibular symphysis and inserts itself into the body of the hyoid bone and the entire length of the tongue. This muscle is responsible for protrusion, or 'sticking the tongue out', and the depression of the tongue.

The hyoglossus muscle is located on the floor of the oral cavity, immediately lateral to the geniohyoid. It arises from the hyoid bone and inserts itself into the lateral aspect of the tongue. The hyoglossus muscle functions to depress and retract the tongue.

The styloglossus muscle is a thin, paired muscle found on either side of the oropharynx. It originates from the styloid process of the temporal bone and inserts itself into the lateral aspect of the tongue. This muscle retracts and elevates the tongue.

The palatoglossus muscle is associated with the soft palate and is innervated by the vagus nerve. It arises from the palatine aponeurosis and inserts itself across the tongue. The function of the palatoglossus muscle is to elevate the posterior portion of the tongue.

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