Extrinsic Muscles of Tongue

The intrinsic muscles are confined entirely within the larynx and have their origin and insertion there. November 03 2021 Reading time.

Anatomy And Physiology Tongue Muscles Anatomy

The supra- and infrahyoid muscle groups attach to the hyoid boneThis in turn is bound to the larynx by strong ligaments.

. C the muscles of the tongue. The tongue is a muscular mass and although it is made up of several muscles all act in conjunction with each other to perform various movements. 3 minutes If youve ever attempted to learn the origins insertions innervations and functions of all 600 muscles in the body youll know what a soul-destroying task it can be.

B the muscles of vocal expression. Muscle anatomy reference charts Author. Tongue consists of eight muscles.

The extrinsic muscles originate outside of the tongue and inside the oral cavity and insert into the tongue itself. Gross anatomy Relations andor boundaries. The extrinsic muscles act on the region and pass between the larynx and parts around it but have their origin elsewhere.

The following functional groups except A the muscles of facial expression. Dimitrios Mytilinaios MD PhD Last reviewed. Key facts about the extrinsic muscles of the tongue.

The difference is that the later are connected to bones while the earlier are not. Allowing the whole of the larynx. To contract the triceps relaxes while the biceps contracts to lift the armReverse motions need antagonistic pairs located in opposite sides of a joint or bone including abductor-adductor.

Laterally by the thyroid cartilage and thyrohyoid membrane. Inferior fibres protrude the tongue middle fibres depress the tongue and superior fibres draw the tip back and down. The extrinsic muscles are as follows.

Molly Smith DipCNM mBANT Reviewer. Which eye muscle sends its tendon of origin through. Arises from the mandibular symphsis.

The additional speech sounds that the human tongue enables us to produce particularly i allow humans to. The tongue muscles can be divided into the intrinsic and extrinsic groups. Bilateral contraction - Depresses and protrudes tongue.

They are the genioglossus hyoglossus styloglossus and palatoglossus muscles. Inserts into the body of the hyoid bone and the entire length of the tongue. This is actually the same job of the extrinsic ones.

These various muscles are grouped as intrinsic muscles those entirely within the tongue that affect shape and extrinsic muscles those that originate outside the tongue attach to it and surrounding bones and affect its position. Antagonist and agonist muscles often occur in pairs called antagonistic pairsAs one muscle contracts the other relaxesAn example of an antagonistic pair is the biceps and triceps. The tongue is a mass of muscles covered by a mucous membrane that is important for taste sensation.

In some cases inadequate strength and placement of the tongue are due to an oral-motor disorder. The structure is a depression bounded. Medially by the aryepiglottic fold and arytenoid and cricoid cartilages.

The tongue is made up of 8 different muscles classified as intrinsic and extrinsic. Broadly the intrinsic muscles can alter the shape of the tongue while the extrinsic muscles change the position of the tongue. Inferiorly by the level of the inferior border of the cricoid cartilage.

Four of them are extrinsic and the other intrinsic. They are comprised of the suprahyoid and infrahyoid groups and the stylopharyngeus a muscle of the pharynx. Superiorly by the level of the hyoid bone.

The extrinsic muscles act to move the larynx superiorly and inferiorly. Muscles visible at the body surface are often called A internus. The tongue must work properly in cooperation with the lips teeth and jaw to properly and clearly execute speech sounds.

The intrinsic muscles are responsible for changing its shape through the movements the tongue can make.

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