Region: Oral Cavity

Hyoglossus Muscle

Hyoglossus Muscle The structure indicated is the hyoglossus muscle of the tongue. The hyoglossus muscle is one of the extrinsic muscles of the tongue. The muscles involved with the tongue consist of intrinsic muscles which lie within the tongue itself, and the extrinsic muscles which attach to the tongue and are responsible for depression, elevation, protraction and retraction of the tongue. There are four sets of extrinsic tongue muscles: Genioglossus Hyoglossus Palatoglossus Styloglossus Origin: Greater horn and body of hyoid bone Insertion: Lateral aspect of tongue Action: Depression and retraction of tongue Innervation:  Hypoglossal nerve (cranial nerve XII) Learn all …

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Hyoglossus

Genioglossus

Genioglossus The structure indicated is the genioglossus muscle of the tongue. The genioglossus muscle is one of the extrinsic muscles of the tongue. The muscles involved with the tongue consist of intrinsic muscles which lie within the tongue itself, and the extrinsic muscles which attach to the tongue and are responsible for depression, elevation, protraction and retraction of the tongue. There are four sets of extrinsic tongue muscles: Genioglossus Hyoglossus Palatoglossus Styloglossus The genioglossus is a large muscle which extends anteriorly from the chin, to the tongue. The genioglossus is involved in depression and protrusion of the tongue. Origin: Superior …

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Genioglossus

Soft Palate

Soft Palate The structure indicated is the soft palate. The hard and soft palates form the roof of the oral cavity. The oral cavity opens anteriorly on the face via the oral fissure. Posteriorly the oral cavity opens into the oropharynx via oropharyngeal isthmus. The floor is formed mainly of the tongue and surrounding soft tissue. Laterally, the oral cavity is bounded by the muscular cheeks. The hard palate forms the anterior portion of the roof of the oral cavity and consists of a plate of bone (from the maxilla and palatine bones) covered in mucosa. Posteriorly, the soft palate …

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Soft Palate

Fungiform Papilla

Fungiform Papilla The structure indicated represents a fungiform papillae, one of the four types of lingual papillae found on the surface of the tongue. There are four types of lingual papillae found on the tongue: Circumvallate papillae (top right) Fungiform papillae (bottom left) Filiform papillae (bottom middle) Foliate papillae (bottom right) The only papillae not associated with taste buds are the filiform papillae. Fungiform papillae are mushroom shaped and contain taste buds on their upper surface allowing distinction of all five modalities of taste: Bitter Sweet Sour Salty Umami
Fungiform Papilla

Orbicularis Oris Muscle

Orbicularis Oris The muscle indicated is the orbicularis oris muscle. The orbicularis oris muscle is one of the muscles of facial expression belonging to the oral group. The muscles of facial expression can be organised into functional groups to provide a more structured approach to understanding the muscles. The functional groups include the following: Orbital group Nasal group Oral group Other The oral group of muscles includes muscles that are responsible for moving the lips and the cheek. There are 11 muscles included in this functional group: orbicularis oris, depressor anguli oris, depressor labi inferioris, mentalis, risorius, buccinator, zygomaticus major, …

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Orbicularis Oris

Styloglossus Muscle

Styloglossus Muscle The muscle indicated is the styloglossus muscle       . The styloglossus muscles is one of three styloid muscles. The three styloid muscles are: Styloglossus Stylohyoid Stylopharyngeus Origin: Styloid process of temporal bone Insertion: lateral aspect of tongue Innervation: Hypoglossal nerve (cranial nerve 12) Action: Elevation and retraction of the tongue The styloid muscle is one of several extrinsic muscles of the tongue. Learn all about the extrinsic muscle of the tongue in this anatomy tutorial.
Styloglossus